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We present measurements and modeling of collimating surface states in slow-light photonic crystal superlattices consisting of alternating dispersive and homogeneous media. Superlattice periodicity allows evanescent-wave resonant coupling to surface photon bound states, supporting collimation.
The first experimental demonstration of resonant optical trapping of dielectric particles in a hollow photonic crystal cavity is reported. The existence of mutual interaction between the confined field and the particle is revealed.
We find beams that self-bend to highly nonparaxial angles in a general periodic optical system, demonstrating how light can be guided in structures by only tailoring the incoming field, without altering the structure itself.
We experimentally demonstrate simultaneous selective detection of xylene and trichloroethylene using photonic crystal waveguide. Sensitivity is improved by slow light effect of PC to 1ppb (v/v) for xylene and 10ppb (v/v) for TCE in water.
Thermo-optic switch based on W1 photonic crystal waveguide is demonstrated, high extinction ratio of 23.5 dB has been experimentally achieved under a switching power as low as 8.9 mW while the device is only 16.8-μm-long.
A compact photonic crystal drop filter has been designed using 3D topology optimization and fabricated in silicon-on-insulator material. Measurements and modeling are in excellent agreement showing a low-loss ∼11nm 3dB bandwidth of the filter.
We experimentally demonstrate a new 2D photonic crystal design with index of refraction detection limit of 1×10−7 [RIU]. This new type of photonic crystal opens new avenues for label-free bio-sensing applications.
We present a mass fabrication method of diamond nanoscale slabs by alternating plasma etching and mask deposition. These slabs support NV− spins with long coherence times and are suitable for a range of nanophotonic devices.
We propose a two-colors all-optical gate based on two coupled single-mode Photonic Crystals. Real-time switching and wavelength conversion at a rate up to 10 GHz have been demonstrated.
We experimentally demonstrate a compact two-photon path entanglement source based on 2D nonlinear quasi phase matching technique. Photon pairs are directly generated into well defined and easy to collect non-collinear beamlike modes.
Silicon photonic crystal nanocavities were monolithically integrated to construct multichannel all-optical switches. Successful operation of 25 resonant channels was demonstrated with a length of only 200 μm and an energy consumption in the femtojoule regime.
We demonstrate that coupled cavity-waveguide architectures can lead to enhanced experimentally measured detection limit of 300 fM (20pg/ml) for sensing the binding of avidin to biotin in photonic crystal micro-cavity based biosensor.
We demonstrate high-speed diffraction-limited 3D direct laser writing using pivoted galvo mirrors. High photoresist curing speeds and stitching of individual scan fields allow for the fabrication of diffractive and refractive micro-optical elements on large areas.
We present a high-sensitivity, multi-use optical gas sensor based on a one-dimensional polymer photonic crystal cavity. With an experimental Q exceeding 13100, we predict detection levels on the parts-per-billion range for a variety of gases.
A 16 element corrugated waveguide array fabricated in a single step is demonstrated to achieve over 15° of steering via wavelength tuning. Optical crosstalk suppression is achieved by inserting 2D photonic crystal between array elements.
We report room-temperature lasing in a photonic crystal nanobeam cavity. The electrical current pulse is injected through a central post placed underneath the nanobeam. Lasing action is observed at a wavelength of ∼1470 nm with a threshold current of ∼ 9μA.
Through experimental study of an array of coupled photonic crystal cavities, we find that the intercavity coupling is significantly larger than the fabrication-induced disorder, a necessary condition for the generation of strongly correlated photons.
We develop a Q-factor controllable photonic crystal nanobeam cavity incorporating quantum dots. Wide Q-factor control from 3,500 to 14,000 is demonstrated by means of MEMS, supplying bias from 0 to 18 V.
We have demonstrated a multi-color array of photonic crystal lasers on a single chip. By lithographically defining the geometrical properties of the photonic crystals we have achieved tuning from 376–435 nm using a single epitaxial growth.
We report an on-chip single photon buffer experiment using a coupled-resonator optical waveguide. A pulsed photon from a correlated photon pair source was successfully delayed by 160 ps while maintaining non-classical intensity correlation.
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