Xavier LETARTRE                                Version française               

Directeur de recherche C.N.R.S

INL
Site Ecole Centrale de Lyon
Batiment F7
36, Avenue Guy de Collongue
69134 Ecully
France

Tel : (33).04 72 18 60 81

E-mail : xavier.letartre@ec-lyon.fr

Localisation : F7 1er étage


Research activities

HDR

Department : Photonique / Photovoltaïque

Group : Nanophotonique

Activities :


C.V.


Publications (last 5 years)

Articles Conférences invitées Communications
 

Articles (16)

Engineering of slow Bloch modes for optical trapping
L. Milord, E. Gerelli, C. Jamois, A. Harouri, C. Chevalier, P. Viktorovitch, X. Letartre, T. Benyattou, , , , , , , , , , , ,
Applied Physics Letters 106 121110 2015 AbstractIn the present paper, we propose an approach based on slow Bloch mode microcavity that enables the optical trapping of small nanoparticles over a broad surface. A specific design based on a double-period photonic crystal is presented. It enables an easy coupling using a wide free-space Gaussian beam and the cavity Q factor can be tuned at will. Moreover, the microcavity mode is mainly localized within the photonic crystal holes, meaning that each hole of the microcavity behaves as efficient nanotweezers. Experimental studies have shown that 200 nm and 100 nm particles can be trapped within the microcavity, in a spatial region that corresponds to the size of one hole (200 nm wide). The experimental trap stiffness has been extracted. It shows that this approach is among the most performant ones if we take into account the size of the cavity.       
Optical polarization properties of InAs/InP quantum dot and quantum rod nanowires
R. Anufriev, J. Barakat, G. Patriarche, X. Letartre, C. Bru-Chevallier, J.C. Harmand, M. Gendry, N. Chauvin
Nanotechnology 26 395701 2015       Full pdf (Restricted access)
Nanoantenna-induced fringe splitting of Fabry-Perot interferometer: a model study of plasmonic/photonic coupling
H. Liu, M. Erouel, E. Gerelli, A. Harouri, T. Benyattou, R. Orobtchouk, L. Milord, A. Belarouci, X. Letartre, C. Jamois, , , , , , , , , ,
Optics Express 23 31085 2015       
Tuneable dual-mode micro-resonator associating photonic crystal membrane and Fabry-Pérot cavity
K. Kusiaku, J.L. Leclercq, P. Viktorovitch, X. Letartre
IEEE Photonics Journal Vol 6, N°2 4700209 2014       
Perturbation approach for the control of the quality factor in photonic crystal membranes: Application to selective absorbers
C. Blanchard, P. Viktorovitch, X. Letartre
Physical Review A: Atomic, Molecular and Optical Physics 90 033824 2014       
Inhibition of light emission in a 2.5 D photonic structure
R. Peretti, C. Seassal, X. Letartre, X. Letartre
Journal of Applied Physics 116 023107 2014       
Huge light-enhancement by coupling a bowtie nano-antenna’s plasmonic resonance to a photonic crystal mode
A. El Eter, T. Grosjean, P. Viktorovitch, X. Letartre, T. Benyattou, F. Baida
Optics Express 22 14464 2014       
Optical mode study of III–V-nanowire-based nanophotonic crystals for an integrated infrared band microlaser
Z. Lin, M. Gendry, X. Letartre
Photonics Research 2, Issue 6 pp. 182-185 (2014) 2014       
Optical mode study of III–V-nanowire-based nanophotonic crystals for an integrated infrared band microlaser
Z. Lin, M. Gendry, X. Letartre
Photonics Research 2(6) 182 2014       
Differential ultrafast all-optical switching of the resonances of a micropillar cavity
C. Blanchard, P. Viktorovitch, X. Letartre
Applied Physics Letters 105 2014 AbstractWe perform frequency-and time-resolved all-optical switching of a GaAs-AlAs micropillar cavity using an ultrafast pump-probe setup. The switching is achieved by two-photon excitation of free carriers. We track the cavity resonances in time with a high frequency resolution. The pillar modes exhibit simultaneous frequency shifts, albeit with markedly different maximum switching amplitudes and relaxation dynamics. These differences stem from the non-uniformity of the free carrier density in the micropillar, and are well understood by taking into account the spatial distribution of injected free carriers, their spatial diffusion and surface recombination at micropillar sidewalls. (C) 2014 AIP Publishing LLC.       
Effect of SAM chain length and binding functions on protein adsorption: beta-Lactoglobulin and apo-transferrin on gold
K. Kusiaku, J.L. Leclercq, P. Viktorovitch, X. Letartre
Collection Symposium Series on Chemistry of Nucleic Acid Components 116 2014 AbstractControlled immobilization of proteins is crucial in many applications, including biosensors. Allergen biosensing, for example, requires molecular recognition of suitably immobilized proteins by specific antibodies and sensitive measurement of this interaction. Self-assembled monolayers (SAMs), terminated by active functions, and are of great interest for the immobilization of biomolecules. The efficiency of further biorecognition involving molecules immobilized on these surfaces demonstrates an interesting dependence on the chain length and terminal function of the SAM. This motivated us to investigate adsorption of two proteins both known as milk allergens-beta-lactoglobulin and apo-transferrin-on amine-terminated SAMs. We varied the chain length by using either short or long chain amine-terminated thiols (cysteamine, CEA, and 11-mercaptoundecylamine, MUAM). We also investigated the influence of the addition of a rigid cross-linker, p-phenylene diisothiocyanate (PDITC), to these amine layers prior to protein adsorption. Protein binding was studied using polarization modulation-infrared reflection absorption spectroscopy (PM-IRRAS) and atomic force microscopy (AFM) to characterize their amount and dispersion. We found that protein immobilization varies with SAM chain length and is also influenced by the presence of a cross-linker. The presence of a rigid cross-linker favours the binding of proteins on long chain SAMs, while the effect is almost nonexistent on shorter chains. In addition, the presence of the cross-linker induces a better dispersion of the proteins on the surfaces, regardless of the length of the thiols forming the SAMs. The effects of chain length and chemistry of protein binding are discussed. (C) 2014 Published by Elsevier B.V.       
Spherical curves design for micro-origami using intrinsic stress relaxation
A. Danescu, C. Chevalier, G. Grenet, P. Regreny, X. Letartre, J.L. Leclercq
Applied Physics Letters 102 (12) 123111 2013       
III-V-on-Si Photonic Crystal VCSEL Arrays for Wavelength Division Multiplexing
C. Sciancalepore, B. Ben Bakir, S. Menezo, X. Letartre, D. Bordel, P. Viktorovitch
IEEE Photonics Technology Letters 25 1111 2013 AbstractDouble photonic crystal mirror vertical-cavity surface-emitting laser (PCM-VCSEL) arrays for the heterogeneous integration on complementary metal-oxide-semiconductor (CMOS) are presented. The trimming of one-dimensional photonic crystal mirrors spectral and modal features allows a fine tailoring of the lightwave which results in compact VCSEL arrays exhibiting a fully-controllable dense wavelength distribution. Optically-pumped double PCM-VCSELs emit 1.55-m single-mode beams within the C-band with sub-milliwatt thresholds and spectral purity, making these devices highly-suitable for telecommunication-oriented applications. The intrinsic capability exhibited by PCM-VCSEL arrays for a selective addressing of dense wavelength division multiplexing (DWDM) channels suggests a strong perspective potential for several applications such as high-capacity ultra-wideband optical interconnects, passive optical networks (PONs), free-space data transmission and sensing.       
Strong confinement of light in low index materials: the Photon Cage
C. Sieutat, R. Peretti, J.L. Leclercq, P. Viktorovitch, X. Letartre
Optics Express 21 - 17 20015-20022 2013 AbstractNew photonic microstructures are proposed for an efficient light trapping in low index media. Cylindrical hollow cavities formed by bending a photonic crystal membrane are designed. Using numerical simulations, strong confinement of photons is demonstrated for very open resonators. The resulting strong light matter interaction can be exploited in optical devices comprising an active material embedded in a low index matrix like polymer or even gaz. (C)2013 Optical Society of America       
Mode competition in a dual-mode quantum-dot semiconductor microlaser
L. Chusseau, F. Philippe, P. Viktorovitch, X. Letartre
Frontiers of characterization and metrology for nanoelectronics: AIP Conference 88 015803 2013 AbstractThis paper describes the modeling of quantum-dot lasers with the aim of assessing the conditions for stable cw dual-mode operation when the mode separation lies in the THz range. Several possible models suited for InAs quantum dots in InP barriers are analytically evaluated, in particular quantum dots electrically coupled through a direct exchange of excitation by the wetting layer or quantum dots optically coupled through the homogeneous broadening of their optical gain. A stable dual-mode regime is shown possible in all cases when quantum dots are used as active layer whereas a gain medium of quantum well or bulk type inevitably leads to bistable behavior. The choice of a quantum-dot gain medium perfectly matched the production of dual-mode lasers devoted to THz generation by photomixing.       
Effects of Photonic Crystals on the Light Output of Heavy Inorganic Scintillators
A. Knapitsch, E. Auffrey, C. Fabjan, J.L. Leclercq, X. Letartre, R. Mazurczyk, P. Lecoq, , , , , , , , , , , , ,
IEEE Transcations on Nuclear Science 60 2322 2013       

Conférences invitées (22)

Hybrid Bloch modes for controlling the spatio-temporal properties of photons
T. Deschamps, F. Dubois, H. Nguyen, P. Viktorovitch, J.L. Leclercq, C. Seassal, X. Letartre, , , , , , , , , , , , ,
2nd International Conference on Physics of 2D Crystals, ICP2C2 2017 Ha Long, Vietnam April 25-30, 2017       
High index dielectric optical meta-surfaces with broken vertical symmetry
F. Dubois, T. Deschamps, H. Nguyen, X. Letartre, J.L. Leclercq, C. Seassal, P. Viktorovitch, , , , , , , , , , , , ,
High Contrast Metastructures VI, Photonics West San Francisco, USA 27 January - 1 February, 2017       
Vers la réalisation de composants optiques nonlinéaires intégrés sur puce exploitant du graphène
A. Pavlova, M. Kemiche, J. Lhuillier, T. Wood, R. Mazurczyk, P. Regreny, P. Rojo Romeo, B. Vilquin, C. Grillet, S. Callard, X. Letartre, C. Monat, , , , , , , ,
colloque SFO-PAMO, 24ème Congrès Général de la SFP  Orsay, France 3-7 juillet 2017       
Widened photonic functionality of asymmetric high-index contrast/photonic crystal gratings
H. Nguyen, X. Letartre, J.L. Leclercq, C. Seassal, P. Viktorovitch, , , , , , , , , , , , , , ,
Photonics West 2016 San-Francisco, USA 13-18 February 2016       
Dispersion engineering of exciton polariton in double period photonic crystal
H. Nguyen, F. Dubois, X. Letartre, J.L. Leclercq, C. Seassal, P. Viktorovitch, , , , , , , , , , , , , ,
17th PLMCN Nara (Japan) March 28-31, 2016       
High index dielectric optical “meta-surfaces” with broken vertical symmetry
H. Nguyen, F. Dubois, T. Deschamps, X. Letartre, J.L. Leclercq, C. Seassal, P. Viktorovitch, , , , , , , , , , , , ,
OSA Subwavelength Photonics Incubator washington USA 21-23 September 2016       
Caractéristiques de dispersion à la demande dans les structures diffractives tout diélectriques à fort contraste d’indice et à symétrie transverse brisée
H. Nguyen, F. Dubois, T. Deschamps, X. Letartre, J.L. Leclercq, C. Seassal, P. Viktorovitch, , , , , , , , , , , , ,
« Nouveaux systèmes périodiques / Instrumentation diffractive» Journées du CCT-CNES et du GT2 – GDR Ondes  Toulouse 29 et 30 novembre       
Mid-IR integrated photonics for sensing applications
L. Carletti, C. Monat, R. Orobtchouk, P. Rojo Romeo, Z. Lin, C. Jamois, J.L. Leclercq, P. Viktorovitch, X. Letartre, C. Grillet, , , , , , , , , ,
Photonics west 2015, Quantum Sensing and Nanophotonic Devices  San Francisco, USA 8 février 2015 AbstractThe mid-infrared (mid-IR, wavelength range between 2 and 10 μm) is of great interest for a huge range of applications such as medical and environment sensors, security, defense and astronomy. I will give a broad overview of the different activities recently launched in INL Lyon, in close collaboration with several French and Australian institutions, under the umbrella of “Mid-IR integrated photonics” with a particular focus on novel integrated sources for the Mid-IR including hybrid III-V semiconductors on SiGe sources, thermal sources and nonlinear sources. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.        
Directional and Selective Mid-Infrared Thermal Emitters for Sensing Applications
C. Blanchard, Q. Levesque, D. Costantini, C. Jamois, J.L. Leclercq, A. Coutrot, F. Marquier, L. Milord, C. Grillet, H. Benisty, P. Viktorovitch, X. Letartre, J. Greffet, , , , , , ,
Optical Sensors 2015 Boston (USA) 27 June–1 July 2015       
High-Contrast Gratings for Long-Wavelength Laser Integration on Silicon
C. Sciancalepore, A. Descos, D. Bordel, H. Duprez, X. Letartre, S. Menezo, B. Ben Bakir
Photonics West 2014 San Francisco - California - United States 1 - 6 February 2014       
Confinement of photons and control of their emission using surface addressable photonic crystal membrane
X. Letartre, R. Peretti, C. Blanchard, C. Sciancalepore
Photonics West 2014 San Francisco - California - United States 1 - 6 February 2014       
High-index contrast/photonic crystal gratings: a wealth of new photonic functionality
P. Viktorovitch, X. Letartre, B. Ben Bakir, S. Menezo
Photonics West 2014 San Francisco - California - United States 1 - 6 February 2014       
Photonic crystal membrane resonators: A wealth of new photonic functionality
P. Viktorovitch, X. Letartre, B. Ben Bakir, S. Menezo
International Conference on Transparent Optical Networks (ICTON) Graz (Austria) 6-10 july 2014       
Photonic crystal mirrors: a cornucopia of nanopatterned structures for the taming of light at the wavelength scale
R. Artinyan, C. Belacel, Z. Lin, J.L. Leclercq, S. Callard, X. Letartre
Advanced Laser Technologies International Conference (ALT) Cassis (France) 6-10 october 2014       
Silicon CMOS Compatible Transition Metal Dioxide Technology for Boosting Highly Integrated Photonic Devices with Disruptive Performance
P. Sanchis, L. Sanchez, P. Castera, A. Rosa, A. Gutierrez, A. Brimont, G. Saint-Girons, R. Orobtchouk, S. Cueff, P. Rojo Romeo, R. Bachelet, P. Regreny, B. Vilquin, C. Dubourdieu, X. Letartre, E. Grenier, J. Penuelas, X. Hu, S. Abel, J. Fompeyrine
16th International Conference on Transparent Optical Networks (ICTON) Graz, Austria July 06-10, 2014 AbstractIn this work we will present the objectives and last results of the FP7-ICT-2013-11-619456 SITOGA project. The SITOGA project will address the integration of transition metal dioxides (TMO) materials in silicon photonics and CMOS electronics. TMOs have unique electro-optical properties that will offer unprecedented and novel capabilities to the silicon platform. SITOGA will focus on two disruptive TMO materials, barium titanate (BaTiO3) and vanadium didioxide (VO2), for developing advanced photonic integrated devices for a wide range of applications. Innovative integration processes with silicon photonics circuits and CMOS electronics will be developed. The whole technology chain will be validated by two functional demonstrators: a 40 Gbit/s DPSK transceiver and an 8x8 switching matrix with 100 Gbit/s throughput.       
Heterostructures combining functional oxides and semiconductors for integrated photonics
G. Saint-Girons, S. Cueff, B. Meunier, X. Hu, L. Louahadj, L. Mazet, R. Orobtchouk, P. Rojo Romeo, R. Bachelet, B. Vilquin, P. Regreny, N. Chauvin, G. Grenet, J. Penuelas, A. Danescu, C. Dubourdieu, X. Letartre, G. Renaud, V. Favre-Nicolin, G. Saint-Girons
Workshop “Les oxydes pour l’optique et la photonique” Meudon (France) 8-9 décembre 2014       
Slow Bloch mode cavity for optical trapping
T. Benyattou, E. Gerelli, C. Jamois, C. Seassal, A. Belarouci, X. Letartre, P. Viktorovitch
ICTON 2013 Cartagena, Espagne 23-27 juin 2013       
Double Photonic Crystal Vertical-Cavity Surface-Emitting Lasers
P. Viktorovitch, C. Sciancalepore, B. Ben Bakir, X. Letartre, C. Seassal
Photonics West 2013 San Francisco - CA - USA 2-7 February 2013       
Ultra-Compact Vertical-Cavity Surface-Emitting Lasers Using a Double Set of Photonic Crystal Mirrors
C. Sciancalepore, P. Viktorovitch, B. Ben Bakir, X. Letartre, C. Seassal
Photonics West 2013 San Francisco - CA - USA 2-7 February 2013       
CMOS compatible photonic crystal VCSELs: a wealth of new photonic functionality
P. Viktorovitch, B. Ben Bakir, S. Menezo, X. Letartre, C. Sciancalepore, D. Bordel, C. Seassal
IEEE Summer Topicals 2013 Hawaii Islands (Hawaii) - United States 8-10 July 2013 AbstractCMOS-compatible III-V/Si vertical-cavity surface-emitting lasers (VCSELs) based on a double set of photonic crystal reflectors are demonstrated, showing single-mode continuous-wave operation at 1.55-µm with thresholds in the sub-mW range. The natural propensity of these VCSEL devices for achieving a wide range of functionality is discussed.       
Potential and pitfalls of silicon photonics computing and interconnect
S. Le Beux, I. O Connor, Z. Li, X. Letartre, C. Monat, J. Trajkovic, G. Nicolescu
IEEE International Symposium on Circuits and Systems (ISCAS) Beijing, China 19-23 May 2013       
PHOTONIQUE INTEGREE HETEROGENE SUR SILICIUM
X. Letartre
Optique Paris 2013 Villetaneuse 8-11 juillet AbstractLa convergence de la Photonique et de l'Electronique ("Photonics on CMOS") est aujourd'hui reconnue comme un enjeu majeur dans le domaine du traitement de l'information. Elle est en effet rendue nécessaire non seulement pour améliorer les performances des systèmes électroniques tout en réduisant leur consommation, mais aussi pour l'intégration sur une même puce de différentes fonctionnalités (capteurs optiques et circuits de traitement par exemple). Cette convergence passe nécessairement par l'intégration sur le silicium, matériau incontournable de l’électronique, de nouveaux matériaux. C'est notamment le cas des semiconducteurs III-V indispensables à la réalisation de sources de lumières performantes. Nous montrerons que cette contrainte est aussi un atout pour l'intégration multifonctionnelle, notamment parce que l'optoélectronique bénéficie ainsi de la maturité des technologies silicium. Nous discuterons d'abord des différentes voies d'intégration de nouveaux matériaux, essentiellement III-V (collage moléculaire, hétéroépitaxie), sur silicium. Ce propos sera illustré par des exemples récents de microlasers intégrés sur silicium. Nous tracerons enfin des perspectives pour la convergence Photonique/Electronique en discutant d'une part de l'introduction d'autres matériaux (tels que le graphène) et, d'autre part, des nouveaux champs d'applications de cette association.        

Communications (20)


Addressing nanoantennas with slow Bloch mode cavity: application to optical trapping
L. Milord, C. Jamois, X. Letartre, P. Viktorovitch, A. El Eter, T. Grosjean, F. Baida, T. Benyattou, , , , , , , , , , , ,
High Contrast Metastructures VI, Photonics West San Francisco, USA 27 January - 1 February, 2017       
Tight control of light trapping in surface addressable photonic crystal membranes: application to spectrally and spatially selective optical devices
X. Letartre, C. Blanchard, C. Grillet, C. Jamois, J.L. Leclercq, P. Viktorovitch, , , , , , , , , , , , , ,
Conference on Photonic Crystal Materials and Devices XII, Photonics Europe Brussels, Belgium april 5-7, 2016       
Perturbation model for the control of the spectral properties of high contrast gratings
C. Blanchard, C. Jamois, P. Viktorovitch, C. Grillet, J.L. Leclercq, T. Benyattou, X. Letartre, , , , , , , , , , , , ,
SPIE Photonics West 2015 San Francisco (USA) february 2015       
Self-assembly “micro-origami” photon cages as hollow micro-resonators
A. Danescu, C. Chevalier, R. Artinyan, P. Regreny, G. Grenet, S. Callard, P. Rojo Romeo, X. Letartre, J.L. Leclercq
SPIE Microtechnologies Barcelona, Spain 4-6 mai 2015 AbstractSelective etching of pre-stressed multi-layered structures releases intrinsic stresses creating flexible macroscopic shapes (rolls, spirals, tubes…). Combining mechanical and photonic concepts, we develop an experimental approach by controlling material composition, mask design and etching process in order to obtain prescribed macroscopic 3D hollow optical micro-cavities. New photonic microstructures are proposed for an efficient light trapping in low index media. Cylindrical hollow cavities formed by bending a photonic crystal membrane are designed. Using numerical simulations, strong confinement of photons is demonstrated for very open resonators. The resulting strong light matter interaction can be exploited in optical devices comprising an active material embedded in a low index matrix like polymer or even gaz.       
Multilevel Modeling Methodology For Reconfigurable Computing Systems Based On Silicon Photonics
Z. Li, S. Le Beux, C. Monat, X. Letartre, I. O Connor, , , , , , , , , , , , , , ,
2015 IEEE Computer Society Annual Symposium on VLSI (ISVLSI) Montpellier (France) 8-10 juillet       
mid-infrared integrated photonics on a SiGe platform
L. Carletti, C. Blanchard, D. Allioux, C. Monat, R. Orobtchouk, P. Rojo Romeo, Z. Lin, C. Jamois, J. Leclercq, P. Viktorovitch, X. Letartre, C. Grillet, P. Ma, Y. Yu, B. Luther-Davies, D. Hudson, S. Madden, M. Brun, S. Ortiz, P. Labeye
Opto Electronics Communications Conference (OECC),  Shanghai, PEOPLES R CHINA,  JUN 28-JUL 02, 2015 AbstractThe mid-infrared is of great interest for a huge range of applications such as medical and environment sensors, security, defense and astronomy. I will give a broad overview of the different activities recently launched in INL Lyon, in close collaboration with several French and Australian institutions, under the umbrella of ``Mid-IR        
PbS-based active photon cages
R. Artinyan, A. Benamrouche, C. Belacel, A. Berthelot, P. Rojo Romeo, R. Peretti, B. Gonzalez-Alcevedo, G. Beaudin, V. Aimez, J.L. Leclercq, X. Letartre, S. Callard, , , , , , , ,
Europ. Material research Society EMRS lille (fr) 11-15 mai 2015       
Mid-infrared integrated photonics in a SiGe platform
L. Carletti, C. Blanchard, D. Allioux, C. Monat, R. Orobtchouk, P. Rojo Romeo, Z. Lin, C. Jamois, J.L. Leclercq, C. Grillet, X. Letartre, P. Ma, Y. Yu, B. Luther-Davies, S. Madden, D. Hudson, M. Sinobad, M. Brun, S. Nicoletti, P. Labeye
OECC 2015 shanghai (china) 28 june - 2 july 2015       
Photoluminescence polarization and piezoelectric properties of InAs/InP quantum rod-nanowires
R. Anufriev, N. Chauvin, J. Barakat, H. Khmissi, K. Naji, G. Patriarche, X. Letartre, M. Gendry, C. Bru-Chevallier
CSW 2014 Montpellier, France May, 11-15, 2014       
Optical characterization of active photon cages
R. Artinyan, A. Benamrouche, C. Belacel, A. Berthelot, A. Jurdyc, G. Beaudin, V. Aimez, P. Rojo Romeo, J.L. Leclercq, R. Peretti, X. Letartre, S. Callard
Photonics Europe Brussels, Belgium 14-17 April 2014 AbstractRecently, we developed a new family of 3D photonic hollow resonators which theoretically allow tight confinement of light in a fluid (gaz or liquid): the photon cages. These new resonators could be ideal for sensing applications since they not only localize the electromagnetic energy in a small mode volume but also enforce maximal overlap between this localized field and the environment (i.e. a potential volume of nano-particles). In this work, we will present numerical and experimental studies of the interaction of a photon cage optical mode with nano-emitters. For this, PbS quantum dot emitters in a PDMS host matrix have been introduced in photon cages designed to have optimal confinement properties when containing a PDMS-based active medium. Photoluminescence measurements have been performed and the presence of quantum dot emitters in the photon cages has been demonstrated. Keywords: Near-infrared microcavity, photonic-crystal, air-mode, colloidal quantum dots       
Coupling of quantum dots with a photon cage
R. Artinyan, A. Benamrouche, C. Belacel, A. Berthelot, P. Rojo Romeo, R. Peretti, B. Gonzalez-Alcevedo, G. Beaudin, V. Aimez, J.L. Leclercq, X. Letartre, S. Callard
CLEO 2014 San José, California, USA 8-13 June 2014       
Photonic crystal mirror based optical microsources for silicon photonics
X. Letartre, C. Blanchard, J.L. Leclercq, C. Seassal, P. Viktorovitch
The 7th International Photonics and OptoElectronics Meetings (POEM) Wuhan (China) 18-21 June 2014       
Complementary logic interface for high performan optical computing with OLUT
Z. Li, S. Le Beux, I. O Connor, C. Monat, X. Letartre
Very Large Scale Integration (VLSI-SoC), 2014 22nd International Conference playa del carmen (Mexico) 6-8 october 2014       
High index contrast/Photonic Crystal gratings: a wealth of new photonic functionality
P. Viktorovitch, X. Letartre, B. Ben Bakir, S. Menezo
Conference on High Contrast Metastructures III  San Francisco, CA FEB 04-06, 2014 AbstractHigh index contrast / Photonic Crystal membrane (HCG/PCM) resonators can be exploited to perform an arbitrarily adjustable molding of light at the wavelength scale: they can process free-space as well as wave-guided optical modes along a variety of addressing configurations and transfer functions, where the spectral, spatial, polarization, phase, group delay ... characteristics can be resolved accurately and adjusted at will. The physics of HCG resonators will be revisited based on a simple analytical approach and intuitive arguments, thus providing direct routes for design rules. Specifically, such desired functionalities as wavelength tuning and beam steering will be emphasized. Practical implementation of these functionalities will be presented in the case of VCSEL devices, where silicon HCG/PCM resonators are used as reflectors and are heterogeneously integrated with III-V semiconductor gain material, along a CMOS compatible technological approach.       
Double Photonic Crystal Vertical-Cavity Surface-Emitting Lasers
P. Viktorovitch, C. Sciancalepore, B. Ben Bakir, X. Letartre, C. Seassal
Conference on High Contrast Metastructures II  San Francisco, CA FEB 05-07, 2013 AbstractThe periodic patterning of the optical medium achieved through photonic crystal membranes (PCMs) can be employed for controlling the resonant coupling of external radiation continuum to above-the-light-line flat edges of the folded band structure in strongly corrugated waveguides, resulting in high reflectivity for an efficient quasi-3D light harnessing. Recently, vertical-cavity surface-emitting lasers (VCSELs) emitting in C-band using a double set of one-dimensional Si/SiO2 photonic crystals as compact, flexible, and power efficient mirrors have been realized within a mass-scale fabrication paradigm by employing standard 200-mm microelectronics pilot lines. Conceived as the basic building block for photonics-on-silicon back-end integration of group III-V laser microsources, the extreme flexibility of the novel photonic architecture enables to perform a tailored modal selection of the optical cavity, including polarization and far-field control. It also offers a wide range of functionality, such as on-chip optical routing and a variety of efficient wavelength tuning-trimming schemes. Device compactness ensures a considerable reduction in the device footprint, power consumption, and parasitics. Furthermore, high fabrication yields obtained thanks to the state-of-the-art molecular wafer bonding of III-V alloys on silicon conjugate excellent device performances with cost-effective high-throughput production, indicating strong perspective industrial potential.       
CMOS-Compatible Photonic Crystal VCSEL Arrays for Wavelength Division Multiplexing
C. Sciancalepore, B. Ben Bakir, S. Menezo, X. Letartre, D. Bordel, G. Chareyre, P. Viktorovitch
CLEO 2013 San Jose - CA - United States 9-14 June 2013 Abstract Arrays of CMOS-compatible double photonic crystal mirror vertical-cavity surface-emitting lasers (PCM-VCSELs) for dense wavelength division multiplexing (DWDM) are presented. An optically-pumped16xλ VCSEL array emitting in the C-band with a frequency channel spacing of 100 GHz is demonstrated.       
High-Contrast Metastructures for VCSEL Photonics on Silicon
C. Sciancalepore, B. Ben Bakir, S. Menezo, X. Letartre, D. Bordel, G. Chareyre, P. Viktorovitch
6th European VCSEL Day 2013 Lausanne - Switzerland (CH) 31 May - 1st June 2013       
Reconfigurable photonic switching: Towards all-optical FPGAs
S. Le Beux, Z. Li, C. Monat, X. Letartre, I. O Connor
IFIP/IEEE 21st International Conference on Very Large Scale Integration (VLSI-SoC)  2013 Abstract180-185       
Experimental characterization of hydrogenated amorphous silicon photonic crystal waveguides
L. Carletti, C. Grillet, R. Orobtchouk, T. Benyattou, P. Rojo Romeo, X. Letartre, J.M. Fedeli, C. Monat
Conference on Lasers and Electro-Optics Europe -CLEO EUROPE/IQEC Munich, Germany May 2013       
Optical look up table
Z. Li, S. Le Beux, C. Monat, X. Letartre, I. O Connor
Proceedings of the Conference on Design, Automation and Test in Europe, DATE  March 2013 Abstract873-876