Distributed feedback terahertz frequency quantum cascade lasers with dual periodicity gratings

被引：18

作者：

Castellano, F. ^{[1
,2
]}

Zanotto, S. ^{[1
,2
]}

Li, L. H. ^{[3
]}

Pitanti, A. ^{[1
,2
]}

Tredicucci, A. ^{[1
,4
]}

Linfield, E. H. ^{[3
]}

Davies, A. G. ^{[3
]}

Vitiello, M. S. ^{[1
,2
]}

机构：

[1] CNR, Ist Nanosci, NEST, I-56127 Pisa, Italy

[2] Scuola Normale Super Pisa, I-56127 Pisa, Italy

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

[4] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 01期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

PHASE-LOCKING;

D O I：

10.1063/1.4905338

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have developed terahertz frequency quantum cascade lasers that exploit a double-periodicity distributed feedback grating to control the emission frequency and the output beam direction independently. The spatial refractive index modulation of the gratings necessary to provide optical feedback at a fixed frequency, and simultaneously, a far-field emission pattern centered at controlled angles, was designed through use of an appropriate wavevector scattering model. Single mode terahertz (THz) emission at angles tuned by design between 0 degrees and 50 degrees was realized, leading to an original phase-matching approach for highly collimated THz quantum cascade lasers. (C) 2015 AIP Publishing LLC.

引用

页数：5

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