Stark ladders as tunable far-infrared emitters

K. Donovan; P. Harrison; R. W. Kelsall

doi:10.1063/1.368810

Stark ladders as tunable far-infrared emitters

K. Donovan, P. Harrison, R. W. Kelsall

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

8 Citations (Scopus)

Abstract

A superlattice of GaAs/Ga_1-xAl_xAs 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 μm with an estimated power output of 1.1 mW.

Original language	English
Pages (from-to)	5175-5179
Number of pages	5
Journal	Journal of Applied Physics
Volume	84
Issue number	9
Early online date	14 Oct 1998
DOIs	https://doi.org/10.1063/1.368810
Publication status	Published - 1 Nov 1998
Externally published	Yes

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title = "Stark ladders as tunable far-infrared emitters",

abstract = "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 μm with an estimated power output of 1.1 mW.",

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T1 - Stark ladders as tunable far-infrared emitters

AU - Donovan, K.

AU - Harrison, P.

AU - Kelsall, R. W.

PY - 1998/11/1

Y1 - 1998/11/1

N2 - 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 μm with an estimated power output of 1.1 mW.

AB - 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 μm with an estimated power output of 1.1 mW.

KW - Stark ladder

KW - Quantum well

KW - Infrared radiation

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EP - 5179

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 9

ER -

Stark ladders as tunable far-infrared emitters

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