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Negative refraction in semiconductor metamaterials.
TLDR
A comparatively low-loss, three-dimensional, all-semiconductor metamaterial that exhibits negative refraction for all incidence angles in the long-wave infrared region and requires only an anisotropic dielectric function with a single resonance is demonstrated.
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Fabrication of 5 nm linewidth and 14 nm pitch features by nanoimprint lithography
We report advances in nanoimprint lithography, its application in nanogap metal contacts, and related fabrication yield. We have demonstrated 5nm linewidth and 14nm linepitch in resist using…
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Midinfrared doping-tunable extraordinary transmission from sub-wavelength Gratings
The authors demonstrate doping-tunable extraordinary transmission from subwavelength apertures in a periodic two-dimensional metallic grating deposited upon n-doped GaAs. By varying the doping of the…
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All-semiconductor plasmonic nanoantennas for infrared sensing.
TLDR
A new type of infrared plasmonic antenna for long-wavelength nanoscale enhanced sensing with very weak molecular absorption signatures when these signatures are in spectral proximity to the antenna resonance.
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Next-generation mid-infrared sources
The mid-infrared (mid-IR) is a wavelength range with a variety of technologically vital applications in molecular sensing, security and defense, energy conservation, and potentially in free-space…
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Review of mid-infrared plasmonic materials
Abstract. The field of plasmonics has the potential to enable unique applications in the mid-infrared (IR) wavelength range. However, as is the case regardless of wavelength, the choice of plasmonic…
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Direct observation of minority carrier lifetime improvement in InAs/GaSb type-II superlattice photodiodes via interfacial layer control
We present improved performance in strain-balanced InAs/GaSb type-II superlattice photodetectors grown using InSb interfacial layers, measured using a cross-sectional electron beam induced current…
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Strong absorption and selective thermal emission from a midinfrared metamaterial
We demonstrate thin-film metamaterials with resonances in the midinfrared (mid-IR) wavelength range. Our structures are numerically modeled and experimentally characterized by reflection and…
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Room-temperature continuous-wave quantum cascade lasers grown by MOCVD without lateral regrowth
We report on room-temperature continuous-wave (CW) operation of lambda~8.2 mum quantum cascade lasers grown by metal-organic chemical vapor deposition without lateral regrowth. The lasers have been…
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High-Performance Quantum Cascade Lasers: Optimized Design Through Waveguide and Thermal Modeling
We present a comprehensive model to study the thermal effects in quantum cascade (QC) lasers for continuous-wave (CW) operation at and above room temperature. This model self-consistently solves the…
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