Porous waveguide facilitated low divergence quantum cascade laser

Wen Yin; Quanyong Lu; Wanfeng Liu; Jinchuan Zhang; Lijun Wang; Junqi Liu; Lu Li; Fengqi Liu; Zhanguo Wang

doi:10.1088/1674-4926/32/6/064008

Porous waveguide facilitated low divergence quantum cascade laser

Wen Yin, Quanyong Lu, Wanfeng Liu, Jinchuan Zhang, Lijun Wang, Junqi Liu, Lu Li, Fengqi Liu^*, Zhanguo Wang

^*Corresponding author for this work

Center for Quantum Devices (CQD)

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A quantum cascade laser with a porous waveguide structure emitting at 4.5 μm is reported. A branchlike porous structure filled with metal material was fabricated on both sides of the laser ridge by an electrochemical etching process. In contrast to the common ridge waveguide laser, devices with a porous structure give rather better beam quality. Utilizing this porous structure as a high-order mode absorber, the device exhibited fundamental transverse mode emission with a nearly diffraction limited far-field beam divergence angle of 4.9°.

Original language	English (US)
Article number	064008
Journal	Journal of Semiconductors
Volume	32
Issue number	6
DOIs	https://doi.org/10.1088/1674-4926/32/6/064008
State	Published - Jun 2011

Keywords

Quantum cascade laser
electrochemical etching
porous structure
ridge waveguide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/1674-4926/32/6/064008

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title = "Porous waveguide facilitated low divergence quantum cascade laser",

abstract = "A quantum cascade laser with a porous waveguide structure emitting at 4.5 μm is reported. A branchlike porous structure filled with metal material was fabricated on both sides of the laser ridge by an electrochemical etching process. In contrast to the common ridge waveguide laser, devices with a porous structure give rather better beam quality. Utilizing this porous structure as a high-order mode absorber, the device exhibited fundamental transverse mode emission with a nearly diffraction limited far-field beam divergence angle of 4.9°.",

keywords = "Quantum cascade laser, electrochemical etching, porous structure, ridge waveguide",

author = "Wen Yin and Quanyong Lu and Wanfeng Liu and Jinchuan Zhang and Lijun Wang and Junqi Liu and Lu Li and Fengqi Liu and Zhanguo Wang",

year = "2011",

month = jun,

doi = "10.1088/1674-4926/32/6/064008",

language = "English (US)",

volume = "32",

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TY - JOUR

T1 - Porous waveguide facilitated low divergence quantum cascade laser

AU - Yin, Wen

AU - Lu, Quanyong

AU - Liu, Wanfeng

AU - Zhang, Jinchuan

AU - Wang, Lijun

AU - Liu, Junqi

AU - Li, Lu

AU - Liu, Fengqi

AU - Wang, Zhanguo

PY - 2011/6

Y1 - 2011/6

N2 - A quantum cascade laser with a porous waveguide structure emitting at 4.5 μm is reported. A branchlike porous structure filled with metal material was fabricated on both sides of the laser ridge by an electrochemical etching process. In contrast to the common ridge waveguide laser, devices with a porous structure give rather better beam quality. Utilizing this porous structure as a high-order mode absorber, the device exhibited fundamental transverse mode emission with a nearly diffraction limited far-field beam divergence angle of 4.9°.

AB - A quantum cascade laser with a porous waveguide structure emitting at 4.5 μm is reported. A branchlike porous structure filled with metal material was fabricated on both sides of the laser ridge by an electrochemical etching process. In contrast to the common ridge waveguide laser, devices with a porous structure give rather better beam quality. Utilizing this porous structure as a high-order mode absorber, the device exhibited fundamental transverse mode emission with a nearly diffraction limited far-field beam divergence angle of 4.9°.

KW - Quantum cascade laser

KW - electrochemical etching

KW - porous structure

KW - ridge waveguide

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DO - 10.1088/1674-4926/32/6/064008

M3 - Article

AN - SCOPUS:79960031668

VL - 32

JO - Journal of Semiconductors

JF - Journal of Semiconductors

SN - 1674-4926

IS - 6

M1 - 064008

ER -

Porous waveguide facilitated low divergence quantum cascade laser

Abstract

Keywords

ASJC Scopus subject areas

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