6533b82afe1ef96bd128c48f
RESEARCH PRODUCT
Real space observation of two-dimensional Bloch wave interferences in a negative index photonic crystal cavity
Benoit CluzelL. SalomonColette DumasFrédérique De FornelChristian SeassalNicolas LouvionSégolène CallardLoïc Lalouatsubject
010302 applied physicsPhysicsbusiness.industryPhysics::OpticsMicrostructured optical fiberCondensed Matter Physics01 natural sciencesYablonoviteElectronic Optical and Magnetic MaterialsOpticsSemiconductorNegative refraction0103 physical sciencesMicroscopyBand diagram[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics010306 general physicsbusinessComputingMilieux_MISCELLANEOUSPhotonic crystalBloch wavedescription
We report here the direct observation of two-dimensional (2D) Bloch wave interferences in a negative index photonic crystal by using optical near-field microscopy techniques. The photonic crystal is formed by a defectless honeycomb lattice of air holes etched in III-V semiconductor slab. A scanning near-field optical microscope is used to visualize spatially, as well as spectrally, the light distribution inside the photonic crystal. The recorded near-field spectra and maps presented here unambiguously demonstrate the Bloch wave interferences within the photonic crystal. Then, the spectral and spatial evolution of these interferences allows us to recover experimentally the 2D band diagram of the photonic crystal demonstrating that this structure operates in a negative refraction regime and acts as a left-handed cavity.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-12-01 |