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Title: Photonic crystal cavities with metallic Schottky contacts

We report about the fabrication and analysis of high Q photonic crystal cavities with metallic Schottky-contacts. The structures are based on GaAs n-i membranes with an InGaAs quantum well in the i-region and nanostructured low ohmic metal top-gates. They are designed for photocurrent readout within the cavity and fast electric manipulations. The cavity structures are characterized by photoluminescence and photocurrent spectroscopy under resonant excitation. We find strong cavity resonances in the photocurrent spectra and surprisingly high Q-factors up to 6500. Temperature dependent photocurrent measurements in the region between 4.5 K and 310 K show an exponential enhancement of the photocurrent signal and an external quantum efficiency up to 0.26.
Authors:
; ; ;  [1] ; ;  [2]
  1. Physics Department and Center for Optoelectronics and Photonics Paderborn (CeOPP), Universität Paderborn, Warburger Straße 100, Paderborn 33098 (Germany)
  2. Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Universitätsstraße 150, Bochum D-44780 (Germany)
Publication Date:
OSTI Identifier:
22486369
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CAVITY RESONATORS; CRYSTALS; DESIGN; EXCITATION; FABRICATION; GALLIUM ARSENIDES; INDIUM ARSENIDES; MEMBRANES; METALS; PHOTOLUMINESCENCE; QUANTUM EFFICIENCY; QUANTUM WELLS; READOUT SYSTEMS; RESONANCE; SIGNALS; SPECTRA; SPECTROSCOPY; TEMPERATURE DEPENDENCE