Cerenkov-type phase-matched second-harmonic emission from GaAs/AlGaAs quantum-cascade lasers

被引：8

作者：

Austerer, M. ^{[1
]}

Detz, H. ^{[1
]}

Schartner, S. ^{[1
]}

Nobile, M. ^{[1
]}

Schrenk, W. ^{[1
]}

Andrews, A. M. ^{[1
]}

Klang, P. ^{[1
]}

Strasser, G. ^{[2
,3
]}

机构：

[1] Vienna Univ Technol, Ctr Micro & Nanostruct, A-1040 Vienna, Austria

[2] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA

[3] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 11期

基金：

奥地利科学基金会;

关键词：

D O I：

10.1063/1.2901021

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Second-harmonic (SH) emission in the form of Cerenkov-type phase-matched radiation has been measured for quantum-cascade lasers (QCLs) with built-in nonlinearities. The QCLs operate at 10.9 mu m wavelength and, due to material dispersion, show a high collinear phase mismatch, resulting in low SH external conversion efficiencies on the order of 2 mu W/W(2). Due to our waveguide design, we were able to couple out and measure the generated SH light in the form of Cerenkov-type phase-matched radiation from the substrate of the device. The SH power collected from the Cerenkov beam leads to an increased external conversion efficiency of similar to 50 mu W/W(2). (C) 2008 American Institute of Physics.

引用

页数：3

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