Mechanically robust waveguide-integration and beam shaping of terahertz quantum cascade lasers

被引：16

作者：

Valavanis, A. ^{[1
]}

Han, Y. J. ^{[1
]}

Brewster, N. ^{[2
]}

Dean, P. ^{[1
]}

Dong, R. ^{[1
]}

Bushnell, L. ^{[2
]}

Oldfield, M. ^{[2
]}

Zhu, J. X. ^{[1
]}

Li, L. H. ^{[1
]}

Davies, A. G. ^{[1
]}

Ellison, B. ^{[2
]}

Linfield, E. H. ^{[1
]}

机构：

[1] Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England

[2] STFC, Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

来源：

ELECTRONICS LETTERS | 2015年 / 51卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

Waveguides - Terahertz waves - Integration;

D O I：

10.1049/el.2015.1137

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Terahertz-frequency quantum cascade lasers (THz QCLs) have numerous potential applications as 1-5 THz radiation sources in space science, biomedical and industrial sensing scenarios. However, the key obstacles to their wide-scale adoption outside laboratory environments have included their poor far-field beam quality and the lack of mechanically robust schemes that allow integration of QCLs with THz waveguides, mixers and other system components. A block integration scheme is presented, in which a continuous-wave similar to 3.4 THz double-metal QCL is bonded into a precision-machined rectangular waveguide within a copper heat-sink block. This highly reproducible approach provides a single-lobed far-field beam profile with a divergence of less than or similar to 20 degrees, and with no significant degradation in threshold current or in the range of operating temperatures.

引用

页码：919 / 920

页数：2

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