Single-mode laser action in quantum cascade lasers with spiral-shaped chaotic resonators

被引：38

作者：

Audet, Ross ^{[1
]}

Belkin, Mikhail A.

Fan, Jonathan A.

Lee, Benjamin G.

Lin, Kai

Capasso, Federico

机构：

[1] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[2] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA

[3] Agilent Lab, Palo Alto, CA 94304 USA

[4] Stanford Univ, Dept Elect Engn, Stanford, CA USA

[5] Photodigm, Richardson, TX USA

[6] Infinera, Sunnyvale, CA 94089 USA

[7] Argos Tech, Santa Clara, CA 95051 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 13期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2784290

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors have fabricated and characterized quantum cascade lasers with spiral-shaped microresonators. The lasers operate in pulsed mode at room temperature with peak optical power greater than 20 mW and in continuous wave at temperatures up to 125 K. They exhibit single-mode emission in both pulsed mode and continuous wave operation, with a 30 dB side-mode suppression ratio at injection currents well above threshold. Subthreshold spectral measurements indicate that the spiral cavities support whispering-gallery-like modes. Single-mode lasing occurs on one of these modes. Far-field profiles reveal enhanced directionality compared to microdisk lasers. (C) 2007 American Institute of Physics.

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页数：3

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