Quantum cascade lasers with voltage defect of less than one longitudinal optical phonon energy

被引：19

作者：

Escarra, Matthew D. ^{[1
]}

Hoffman, Anthony J. ^{[1
]}

Franz, Kale J. ^{[1
]}

Howard, Scott S. ^{[1
,2
]}

Cendejas, Richard ^{[1
]}

Wang, Xiaojun ^{[3
]}

Fan, Jen-Yu ^{[3
]}

Gmachl, Claire ^{[1
]}

机构：

[1] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[2] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14850 USA

[3] Adtech Opt Inc, City Of Industry, CA 91748 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 25期

关键词：

high-speed optical techniques; phonons; quantum cascade lasers; TEMPERATURE;

D O I：

10.1063/1.3155429

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Efficient use of applied voltage in quantum cascade (QC) lasers is a critical factor in achieving high wall-plug efficiency and low compliance voltage. We demonstrate a QC laser emitting at 4.2 mu m featuring a low voltage defect and short injector with only four quantum wells. Devices with a voltage defect of 20 meV, well below the energy of the longitudinal optical phonons, and a voltage efficiency of 91%, a record value for QC lasers, are reported for pulsed operation at 180 K. Voltage efficiencies of greater than 80% are exhibited at room temperature. Overall performance showed wall-plug efficiencies ranging from 21% at cryogenic temperatures to 5.3% at room temperature.

引用

页数：3

共 14 条

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