Stark ladders as tunable far-infrared emitters

被引：6

作者：

Donovan, K ^{[1
]}

Harrison, P ^{[1
]}

Kelsall, RW ^{[1
]}

机构：

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

来源：

JOURNAL OF APPLIED PHYSICS | 1998年 / 84卷 / 09期

关键词：

D O I：

10.1063/1.368810

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A superlattice of GaAs/Ga1-xAlxAs quantum wells forms a Stark ladder under the influence of a perpendicular electric field. A two level incoherent emitter system, formed by radiative intersubband transitions between adjacent wells, is investigated as a tunable far-infrared radiation source. Intersubband transition rates are calculated at 4, 77, and 300 K for applied fields from 0 to 40 kV cm(-1). It is shown that the quantum efficiency of the radiative emission reaches a maximum at low temperatures for a field of 32 kV cm(-1). Under these conditions the emission wavelength is 38 mu m with an estimated power output of 1.1 mW. (C) 1998 American Institute of Physics. [S0021-8979(98)04620-9].

引用

页码：5175 / 5179

页数：5

共 15 条

[1]

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[2]

[Anonymous], 1992, QUANTUM MECH

[3] CONTINUOUS-WAVE OPERATION OF A VERTICAL TRANSITION QUANTUM CASCADE LASER ABOVE T=80 K [J].