Magnetic field effects in terahertz quantum-cascade lasers

V. Tamosiunas; R. Zobl; G. Fasching; J. Ulrich; G. Strasser; K. Unterrainer; R. Colombelli; C. Gmachl; K. West; L. Pfeiffer; F. Capasso

doi:10.1088/0268-1242/19/4/115

Magnetic field effects in terahertz quantum-cascade lasers

V. Tamosiunas, R. Zobl, G. Fasching, J. Ulrich, G. Strasser, K. Unterrainer, R. Colombelli, C. Gmachl, K. West, L. Pfeiffer, F. Capasso

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

5 Scopus citations

Abstract

We have measured the emission intensity and spectra of terahertz quantum-cascade lasers in an external magnetic field applied normal to the epilayers. We have observed a reduction of the threshold current, an enhancement of laser emission intensity and shifts of the emission line. A wider operating range was predicted for the selected waveguide design according to our finite-difference time-domain simulation results. The intensity enhancement and the threshold current reduction are attributed to the suppression of nonradiative Auger-intersubband transitions by Landau quantization of the in-plane electron motion, to the modulation of the injection rate via resonant inter-Landau-level transfer, and to the modulation of waveguide properties.

Original language	English (US)
Pages (from-to)	S348-S350
Journal	Semiconductor Science and Technology
Volume	19
Issue number	4 SPEC. ISS.
DOIs	https://doi.org/10.1088/0268-1242/19/4/115
State	Published - Apr 2004
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1088/0268-1242/19/4/115

Cite this

@article{31be111c72774d6187a8dcc457bc2eb3,

title = "Magnetic field effects in terahertz quantum-cascade lasers",

abstract = "We have measured the emission intensity and spectra of terahertz quantum-cascade lasers in an external magnetic field applied normal to the epilayers. We have observed a reduction of the threshold current, an enhancement of laser emission intensity and shifts of the emission line. A wider operating range was predicted for the selected waveguide design according to our finite-difference time-domain simulation results. The intensity enhancement and the threshold current reduction are attributed to the suppression of nonradiative Auger-intersubband transitions by Landau quantization of the in-plane electron motion, to the modulation of the injection rate via resonant inter-Landau-level transfer, and to the modulation of waveguide properties.",

author = "V. Tamosiunas and R. Zobl and G. Fasching and J. Ulrich and G. Strasser and K. Unterrainer and R. Colombelli and C. Gmachl and K. West and L. Pfeiffer and F. Capasso",

year = "2004",

month = apr,

doi = "10.1088/0268-1242/19/4/115",

language = "English (US)",

volume = "19",

pages = "S348--S350",

journal = "Semiconductor Science and Technology",

issn = "0268-1242",

publisher = "IOP Publishing Ltd.",

number = "4 SPEC. ISS.",

}

TY - JOUR

T1 - Magnetic field effects in terahertz quantum-cascade lasers

AU - Tamosiunas, V.

AU - Zobl, R.

AU - Fasching, G.

AU - Ulrich, J.

AU - Strasser, G.

AU - Unterrainer, K.

AU - Colombelli, R.

AU - Gmachl, C.

AU - West, K.

AU - Pfeiffer, L.

AU - Capasso, F.

PY - 2004/4

Y1 - 2004/4

N2 - We have measured the emission intensity and spectra of terahertz quantum-cascade lasers in an external magnetic field applied normal to the epilayers. We have observed a reduction of the threshold current, an enhancement of laser emission intensity and shifts of the emission line. A wider operating range was predicted for the selected waveguide design according to our finite-difference time-domain simulation results. The intensity enhancement and the threshold current reduction are attributed to the suppression of nonradiative Auger-intersubband transitions by Landau quantization of the in-plane electron motion, to the modulation of the injection rate via resonant inter-Landau-level transfer, and to the modulation of waveguide properties.

AB - We have measured the emission intensity and spectra of terahertz quantum-cascade lasers in an external magnetic field applied normal to the epilayers. We have observed a reduction of the threshold current, an enhancement of laser emission intensity and shifts of the emission line. A wider operating range was predicted for the selected waveguide design according to our finite-difference time-domain simulation results. The intensity enhancement and the threshold current reduction are attributed to the suppression of nonradiative Auger-intersubband transitions by Landau quantization of the in-plane electron motion, to the modulation of the injection rate via resonant inter-Landau-level transfer, and to the modulation of waveguide properties.

UR - http://www.scopus.com/inward/record.url?scp=11144355682&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=11144355682&partnerID=8YFLogxK

U2 - 10.1088/0268-1242/19/4/115

DO - 10.1088/0268-1242/19/4/115

M3 - Article

AN - SCOPUS:11144355682

SN - 0268-1242

VL - 19

SP - S348-S350

JO - Semiconductor Science and Technology

JF - Semiconductor Science and Technology

IS - 4 SPEC. ISS.

ER -

Magnetic field effects in terahertz quantum-cascade lasers

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this