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Optical Engineering

Monolithic integration of thin-film coolers with optoelectronic devices
Author(s): Christopher J. LaBounty; Ali Shakouri; Patrick Abraham; John Edward Bowers
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Paper Abstract

Active refrigeration of optoelectronic components through the use of monolithically grown thin-film solid-state coolers based on III-V materials is proposed and investigated. Enhanced cooling power compared to the thermoelectric effect of the bulk material is achieved through thermionic emission of hot electrons over a heterostructure barrier layer. These heterostructures can be monolithically integrated with other devices made from similar materials. Experimental analysis of an InP pin diode monolithically integrated with a heterostructure thermionic cooler is performed. Cooling performance is investigated for various device sizes and ambient temperatures. Several important nonideal effects are determined, such as contact resistance, heat generation and conduction in the wire bonds, and the finite thermal resistance of the substrate. These nonideal effects are studied both experimentally and analytically, and the limitations induced on performance are considered. Heterostructure integrated thermionic cooling is demonstrated to provide cooling power densities of several hundred W/cm2. These microrefrigerators can provide control over threshold current, power output, wavelength, and maximum operating temperature in diode lasers.

Paper Details

Date Published: 1 November 2000
PDF: 6 pages
Opt. Eng. 39(11) doi: 10.1117/1.1315567
Published in: Optical Engineering Volume 39, Issue 11
Show Author Affiliations
Christopher J. LaBounty, Univ. of California/Santa Barbara (United States)
Ali Shakouri, Univ. of California/Santa Cruz (United States)
Patrick Abraham, Univ. of California/Santa Barbara (United States)
John Edward Bowers, Univ. of California/Santa Barbara (United States)


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