Room-temperature mid-infrared interband cascade vertical-cavity surface-emitting lasers

被引：44
|
作者：
Bewley, W. W. [1 ]
Canedy, C. L. [1 ]
Kim, C. S. [1 ]
Merritt, C. D. [1 ]
Warren, M. V. [1 ]
Vurgaftman, I. [1 ]
Meyer, J. R. [1 ]
Kim, M. [2 ]
机构：
[1] Naval Res Lab, Code 5613, Washington, DC 20375 USA
[2] Sotera Def Solut Inc, 7230 Lee DeForest Dr,Suite 100, Columbia, MD 21046 USA
来源：
APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 15期
关键词：
MU-M; VCSELS;
D O I：
10.1063/1.4964840
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report interband cascade vertical-cavity surface-emitting lasers (ICVCSELs) that operate in pulsed mode at temperatures up to 70 degrees C. Their emission at lambda approximate to 3.4 mu m extends considerably the previous longest wavelength of 3.0 mu m for an electrically-pumped vertical-cavity surface-emitting laser operating at room temperature. The output from mesas having diameters ranging from 30 to 60 mu m (with emission aperture diameters of 20-50 mu m) is circularly symmetric, and the threshold current densities at T = 25 degrees C are as low as 390 A/cm(2). However, the differential slope efficiencies are low, e.g., <= 50 mW/A at T = 25 degrees C, due to loss in the top and bottom mirrors and reduced current efficiency. The smallest device operates in a single spectral mode despite having an emission aperture much wider than the wavelength.
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页数：5
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