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We demonstrate that type II InAs/GaSb superlattice photodetector can reach the detection wavelength shorter than $2~\mu \text{m}$ by inserting AlSb barriers. The detector exhibits a narrow-band photoresponse feature ($\delta \lambda /\lambda =10.3\%$ ). At 77 K, the photoresponse maximum is at 1.84 $\mu \text{m}$ and the Johnson noise limited detectivity is $1.1\times 10^{13}$ Jones. We show...
A 2D Active Lattice Filter ALF combining a Manhattan grid of waveguide gain segments with nanophotonic couplers at the waveguide intersections is presented. The particular application reported herein is a basic channelizer. The resulting structure is readily described, designed, and analyzed in Z-transform space. Critical to the implementation of the 2D ALF circuit is a highly efficient small footprint...
We report extremely compact (30 ??m ?? 7 ??m) silicon based two-dimensional (2D) thermo-optically tunable photonic crystal lens which operates at around telecommunication wavelength (1.55 ??m) with transverse magnetic (TM) like polarized light. A 150 nm thick NiCr micro-heater was placed directly on top of the photonic crystal lens to provide localized heating. The focal length of the photonic crystal...
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