High-intensity interminiband terahertz emission from chirped superlattices

被引：45
作者：
Köhler, R
Tredicucci, A
Beltram, F
Beere, HE
Linfield, EH
Davies, AG
Ritchie, DA
机构：
[1] INFM, NEST, I-56126 Pisa, Italy
[2] Scuola Normale Super Pisa, I-56126 Pisa, Italy
[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
来源：
APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 11期
关键词：
D O I：
10.1063/1.1461054
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Electroluminescence at lambdasimilar to69 mum (4.3 THz) is reported from interminiband transitions in quantum-cascade structures with superlattice active regions. Spontaneous emission gives a low-temperature linewidth of 2 meV (0.48 THz) with linear light-current characteristics observed up to high-current densities (625 A/cm(2)), resulting in record output powers of 500 pW. Devices operate up to above liquid-nitrogen temperature, with both emission wavelength and current-voltage characteristics in good agreement with theoretical predictions. (C) 2002 American Institute of Physics.
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页码：1867 / 1869
页数：3
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