High-power surface emission from terahertz distributed feedback lasers with a dual-slit unit cell

被引：48
作者：
Mahler, Lukas [1 ,2 ]
Tredicucci, Alessandro [1 ,2 ]
Beltram, Fabio [1 ,2 ]
Walther, Christoph [3 ]
Faist, Jerome [3 ]
Beere, Harvey E. [4 ]
Ritchie, David A. [4 ]
机构：
[1] CNR, Ist Nanosci, NEST, I-56127 Pisa, Italy
[2] Scuola Normale Super Pisa, NEST, I-56127 Pisa, Italy
[3] ETH, Inst Quantum Elect, CH-8093 Zurich, Switzerland
[4] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 19期
基金：
英国工程与自然科学研究理事会;
关键词：
distributed feedback lasers; laser cavity resonators; quantum cascade lasers; surface emitting lasers; terahertz wave spectra; QUANTUM-CASCADE LASERS; METAL WAVE-GUIDES; RESONATORS;
D O I：
10.1063/1.3430522
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present a surface emitting distributed feedback terahertz laser resonator based on a dual-slit configuration. With the spacing of the slits as a parameter, the surface losses of the lasers can be chosen over a large range, while keeping slits narrow for optimum current injection. Quantum cascade devices based on a double metal waveguide showed slope efficiencies up to 40 mW/A and peak powers of more than 20 mW. The efficient radiation out-coupling does not depend on boundary conditions, and therefore would allow the application to large-area devices, making this an ideal resonator for high-power surface emission. (C) 2010 American Institute of Physics. [doi:10.1063/1.3430522]
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页数：3
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