Person
Romuald Houdré
Related publications (106)
Single particle detection, manipulation and analysis with resonant optical trapping in photonic crystals
Romuald Houdré, Nicolas Maxime André Descharmes, Ulagalandha Perumal Dharanipathy, Zhaolu Diao, Mario Lucien Henri Tonin
We demonstrate a resonant optical trapping mechanism based on two-dimensional hollow photonic crystal cavities. This approach benefits simultaneously from the resonant nature and unprecedented field overlap with the trapped specimen. The photonic crystal s ...
Royal Society of Chemistry2013Continuous-wave vertically emitting photonic crystal terahertz laser
Romuald Houdré, Jérôme Faist, Zhaolu Diao, Christopher Bonzon
Compact semiconductor light sources with high performance continuous-wave (CW) and single mode operation are highly demanded for many applications in the terahertz (THz) frequency range. Distributed feedback (DFB) and photonic crystal (PhC) quantum cascade ...
Wiley-VCH Verlag Berlin2013Statistics of the disorder-induced losses of high-Q photonic crystal cavities
Romuald Houdré, Vincenzo Savona, Momchil Minkov, Ulagalandha Perumal Dharanipathy
We analyze and compare the effect of fabrication disorder on the quality factor of six well-known high-index photonic crystal cavity designs. The theoretical quality factors for the different nominal structures span more than three orders of magnitude, ran ...
Optical Society of America2013Self-trapping and back-action effects in hollow photonic crystal cavity optical trap
Romuald Houdré, Nicolas Maxime André Descharmes, Ulagalandha Perumal Dharanipathy, Zhaolu Diao, Mario Lucien Henri Tonin
We report on the first experimental demonstration of resonant optical trapping of dielectric particles in a two-dimensional hollow photonic crystal cavity. The cavities are implemented in an optofluidic chip consisting of a silicon-on-insulator substrate a ...
Spie-Int Soc Optical Engineering2013All-optical polariton transistor
Although optical technology provides the best solution for the transmission of information, all-optical devices must satisfy several qualitative criteria to be used as logic elements. In particular, cascadability is difficult to obtain in optical systems, ...
Nature Publishing Group2013Imaging of high-Q cavity optical modes by electron energy-loss microscopy
Romuald Houdré, Cécile Hébert, Marco Cantoni, Duncan Thomas Lindsay Alexander, Nicolas Le Thomas
We show a technique that images the intensity distribution and local state of polarization of the optical field of high-quality factor optical modes confined in dielectric planar photonic crystal nanocavities. Based on energy-loss spectroscopy of swift ele ...
Amer Physical Soc2013Numerical modelling of optical trapping in hollow photonic crystal cavities
Romuald Houdré, Ulagalandha Perumal Dharanipathy
Photonic crystal (PhC) devices owing to their strong confinement of electromagnetic energy are considered to be excellent candidates for on chip optical trapping of dielectric or biological particles in the nanometer range. In this work, we study and prese ...
Springer US2012Near-infrared characterization of gallium nitride photonic-crystal waveguides and cavities
Nicolas Grandjean, Romuald Houdré, Jean-François Carlin, Noelia Vico Triviño, Ulagalandha Perumal Dharanipathy, Zhaolu Diao
We report the design and optical characterization of fully suspended wire waveguides and photonic crystal (PhC) membranes fabricated on a gallium nitride layer grown on silicon substrate operating at 1.5 mu m. W1-type PhC waveguides are coupled with suspen ...
Optical Society of America2012Surface emitting Terahertz Photonic Crystal Quantum Cascade Laser realized by Bragg boundary condition
Romuald Houdré, Jérôme Faist, Zhaolu Diao, Christopher Bonzon
We theoretically and experimentally investigate a band edge Photonic Crystal (PhC) Quantum Cascade Laser (QCL) operating at 3.1 THz. The surface emission is achieved by using a second-order Bragg grating at the PhC tile boundaries. Highly directional surfa ...
Ieee2012High quality factor two dimensional GaN photonic crystal cavity membranes grown on silicon substrate
Nicolas Grandjean, Romuald Houdré, Jean-François Carlin, Raphaël Butté, Jacques Levrat, Antonino Francesco Castiglia, Kirill Atlasov, Georg Rossbach, Noelia Vico Triviño, Ulagalandha Perumal Dharanipathy
We report on the achievement of freestanding GaN photonic crystal L7 nanocavities with embedded InGaN/GaN quantum wells grown by metal organic vapor phase epitaxy on Si (111). GaN was patterned by e-beam lithography, using a SiO2 layer as a hard mask, and ...
American Institute of Physics2012