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Self-assembled ErAs islands in GaAs for optical-heterodyne THz generation

Kadow, C. and Jackson, A. W. and Gossard, A. C. and Matsuura, S. and Blake, G. A. (2000) Self-assembled ErAs islands in GaAs for optical-heterodyne THz generation. Applied Physics Letters, 76 (24). pp. 3510-3512. ISSN 0003-6951. doi:10.1063/1.126690.

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We report photomixer devices fabricated on a material consisting of self-assembled ErAs islands in GaAs, which is grown by molecular beam epitaxy. The devices perform comparably and provide an alternative to those made from low-temperature-grown GaAs. The photomixer's frequency response demonstrates that the material is a photoconductor with subpicosecond response time, in agreement with time-resolved differential reflectance measurements. The material also provides the other needed properties such as high photocarrier mobility and high breakdown field, which exceeds 2×10^5 V/cm. The maximum output power before device failure at frequencies of 1 THz was of order 0.1 µW. This material has the potential to allow engineering of key photomixer properties such as the response time and dark resistance.

Item Type:Article
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Matsuura, S.0000-0002-5698-9634
Blake, G. A.0000-0003-0787-1610
Additional Information:© 2000 American Institute of Physics. (Received 9 February 2000; accepted 17 April 2000) This research was supported by Jet Propulsion Lab under Contract No. 960776.
Funding AgencyGrant Number
Subject Keywords:erbium compounds; gallium arsenide; III-V semiconductors; island structure; semiconductor quantum dots; self-assembly; submillimetre wave mixers; molecular beam epitaxial growth; semiconductor growth; time resolved spectra; photoconducting materials; reflectivity; carrier mobility; electric breakdown; microwave photonics
Issue or Number:24
Record Number:CaltechAUTHORS:KADapl00b
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2148
Deposited By: Archive Administrator
Deposited On:12 Mar 2006
Last Modified:08 Nov 2021 19:45

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