Single mode emitting ridge waveguide quantum cascade lasers coupled to an active ring resonator filter
Quantum cascade ridge waveguide lasers with coupled ring resonators have been fabricated. Coupling of an actively pumped microring resonator to a ridge waveguide device allows for filtering the numero...
Quantum cascade ridge waveguide lasers with coupled ring resonators have been fabricated. Coupling of an actively pumped microring resonator to a ridge waveguide device allows for filtering the numero...
Properties of excited xenon atoms in an alternating current plasma display panel
The properties of excited xenon atoms in the discharge cells of a plasma display panel are investigated by measuring the excited atom density via laser absorption spectroscopy. The density of the exci...
The properties of excited xenon atoms in the discharge cells of a plasma display panel are investigated by measuring the excited atom density via laser absorption spectroscopy. The density of the exci...
High quantum efficiency back-illuminated GaN avalanche photodiodes
Appl. Phys. Lett. 93, 211107 (2008); doi:10.1063/1.3039061
Published 26 November 2008
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Back-illuminated avalanche photodiodes (APDs) composed of heterojunctions of either p-GaN/i-GaN/n-AlGaN or p-GaN/i-GaN/n-GaN/n-AlGaN were fabricated on AlN templates. At low voltage, an external quantum efficiency of 57% at 352 nm with a bandpass response was achieved by using AlGaN in the n-layer. Dependency of gain and leakage current on mesa area for these heterojunction APDs were studied. Back-illumination via different wavelength sources was used to demonstrate the advantages of hole-initiated multiplication in GaN APDs.
©2008 American Institute of Physics
| History: | Received 10 October 2008; accepted 7 November 2008; published 26 November 2008 |
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http://link.aip.org/link/?APPLAB/93/211107/1 |
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