Surface plasmon quantum cascade lasers as terahertz local oscillators

被引：25

作者：

Hajenius, M. ^{[1
,2
]}

Khosropanah, P. ^{[2
]}

Hovenier, J. N. ^{[1
]}

Gao, J. R. ^{[1
,2
]}

Klapwijk, T. M. ^{[1
]}

Barbieri, S. ^{[3
]}

Dhillon, S. ^{[3
]}

Filloux, P. ^{[3
]}

Sirtori, C. ^{[3
]}

Ritchie, D. A. ^{[4
]}

Beere, H. E. ^{[4
]}

机构：

[1] Delft Univ Technol, Fac Appl Phys, Kavli Inst NanoSci, NL-2628 CJ Delft, Netherlands

[2] Univ Groningen, SRON Netherlands Inst Space Res, Groningen, Netherlands

[3] Univ Paris 07, F-75205 Paris 13, France

[4] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

OPTICS LETTERS | 2008年 / 33卷 / 04期

关键词：

D O I：

10.1364/OL.33.000312

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We characterize a heterodyne receiver based on a surface-plasmon waveguide quantum cascade laser (QCL) emitting at 2.84 THz as a local oscillator, and an NbN hot electron bolometer as a mixer. We find that the envelope of the far-field pattern of the QCL is diffraction-limited and superimposed onto interference fringes, which are similar to those found in narrow double-metal waveguide QCLs. Compared to the latter, a more directional beam allows for better coupling of the radiation power to the mixer. We obtain a receiver noise temperature of 1050 K when the mixer is at 2 K, which, to our knowledge, is the highest sensitivity reported at frequencies beyond 2.5 THz. (c) 2008 Optical Society of America.

引用

页码：312 / 314

页数：3

共 11 条

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