Room temperature operation of photonic-crystal distributed-feedback quantum cascade lasers with single longitudinal and lateral mode performance

被引：22

作者：

Lu, Quan-Yong ^{[1
]}

Guo, Wan-Hong ^{[1
]}

Zhang, Wei ^{[1
]}

Wang, Li-Jun ^{[1
]}

Liu, Jun-Qi ^{[1
]}

Li, Lu ^{[1
]}

Liu, Feng-Qi ^{[1
]}

Wang, Zhan-Guo ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 05期

关键词：

distributed feedback lasers; holography; photonic crystals; quantum cascade lasers; LITHOGRAPHY; DIFFRACTION;

D O I：

10.1063/1.3295704

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate room temperature operation of photonic-crystal distributed-feedback quantum cascade lasers emitting at 4.7 mu m. A rectangular photonic crystal lattice perpendicular to the cleaved facet was defined using holographic lithography. The anticrossing of the index- and Bragg-guided dispersions of rectangular lattice forms the band-edge mode with extended mode volume and reduced group velocity. Utilizing this coupling mechanism, single mode operation with a near-diffractive-limited divergence angle of 12 degrees is obtained for 33 mu m wide devices in a temperature range of 85-300 K. The reduced threshold current densities and improved heat dissipation management contribute to the realization of devices' room temperature operation.

引用

页数：3

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