Photonic crystal cavities with metallic Schottky contacts

Journal Article · Mon Jul 27 04:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4928038· OSTI ID:22486369

Quiring, W.; Al-Hmoud, M.; Reuter, D.; Zrenner, A. ^[1]; Rai, A.; Wieck, A. D. ^[2]

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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)

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.

• OSTI ID: 22486369
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 4 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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