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We present the design, fabrication and characterization of cubic (3C) silicon carbide microdisk resonators with high quality factor modes at visible and near infrared wavelengths which couple to the intrinsic luminescence in silicon carbide.
We present a novel structure that simultaneously achieves high tensile strain, pseudo-heterostructure, and high-Q optical cavity in a pure Ge layer. Employing our structure in a GeSn layer will enable a truly practical Si-compatible laser.
We demonstrate second harmonic generation in photonic crystal cavities in (001)- and (111)-oriented GaAs, with fundamental resonance at 1800nm, leading to second harmonic below the GaAs bandgap. Below bandgap operation minimizes linear and nonlinear absorption.
We present high quality factor (Q ∼ 103) photonic crystal cavities in cubic silicon carbide (3C-SiC) films grown directly on silicon. We show results in shifted-L3 and nanobeam cavity geometries for applications in nonlinear and quantum photonics.
We demonstrate a nanophotonic platform based on 2D materials coupled to photonic crystal cavities. We show strong enhancement (∼60 times) of light emission due to the photonic crystal.
We describe a photonic crystal nanocavity with multiple spatially overlapping resonances that can serve as a platform for nonlinear frequency conversion. We show nonlinear characterization of structures with two resonances nearly degenerate in frequency. We also demonstrate structures with resonances separated by up to 592 nm.
We demonstrate enhanced second harmonic generation in a GaP photonic crystal waveguide with external conversion efficiency of 5×10−7/W. Our results are promising for frequency conversion of ultrashort pulses and on-chip integrated emitters with broad spectra.
The combination of a single quantum emitter (a quantum dot) and an optical nanocavity has been employed to demonstrate devices ranging from quantum sources and gates to optical switches and modulators controlled with sub-fJ energies.
A combination of a single quantum emitter (a semiconductor quantum dot) with a semiconductor optical nanocavity has been employed to demonstrate devices ranging from optical switches and modulators controlled with sub-fJ energies, to quantum sources.
We demonstrate a 300 MHz quantum dot single photon source at 900 nm triggered by a telecommunications wavelength laser. The quantum dot is excited by on-chip-generated second harmonic radiation, resonantly enhanced by a photonic nanocavity.
A photonic crystal cavity allowing at least two separately tunable resonances is designed. Both frequency degenerate structures and structures with frequency separations of up to 500 nm are experimentally demonstrated.
An investigation of the dielectric properties of polyamine buffer prepared human chromosomes is presented in this paper. Chromosomes prepared in this buffer are only a few micrometers in size and shaped roughly like spherical discs. Dielectrophoresis was therefore chosen as the method of manipulation combined with a custom designed microfluidic system containing the required electrodes for dielectrophoresis...
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