Observation of intersubband absorption in the forbidden polarisation for a stepped double barrier quantum well

K. T. Lai; S. K. Haywood; R. Gupta; M. Missous

doi:10.1049/ip-opt:20030409

Observation of intersubband absorption in the forbidden polarisation for a stepped double barrier quantum well

K. T. Lai, S. K. Haywood, R. Gupta, M. Missous

The University of Hull

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

Abstract

Intersubband absorption in the conduction band of a series of double barrier multiple quantum wells has been studied. Absorption in the forbidden polarisation was observed for a GaAs/In_xGa_(1-x)As/AlAs/Al_yGa_(1-y) As stepped well using 45° waveguide geometry. This is attributed to the relaxation of the polarisation selection rule. This corroborates the authors' previous observation of enhanced absorption at the Brewster angle in these structures. In 45° waveguide geometry, it is possible to resolve Γ(well)-X(AlAs) transitions in some samples. The observed energies of both Γ-Γ and Γ-X transitions are in good agreement with the proposed theoretical model using an X-band effective mass of 0.4 m_o.

Original language	English
Pages (from-to)	377-380
Number of pages	4
Journal	IEE Proceedings: Optoelectronics
Volume	150
Issue number	4
DOIs	https://doi.org/10.1049/ip-opt:20030409
Publication status	Published - 1 Aug 2003

Access to Document

10.1049/ip-opt:20030409

Cite this

@article{f0968c0fdfdf4cba9b0b18e805353dc6,

title = "Observation of intersubband absorption in the forbidden polarisation for a stepped double barrier quantum well",

abstract = "Intersubband absorption in the conduction band of a series of double barrier multiple quantum wells has been studied. Absorption in the forbidden polarisation was observed for a GaAs/InxGa(1-x)As/AlAs/AlyGa(1-y) As stepped well using 45° waveguide geometry. This is attributed to the relaxation of the polarisation selection rule. This corroborates the authors' previous observation of enhanced absorption at the Brewster angle in these structures. In 45° waveguide geometry, it is possible to resolve Γ(well)-X(AlAs) transitions in some samples. The observed energies of both Γ-Γ and Γ-X transitions are in good agreement with the proposed theoretical model using an X-band effective mass of 0.4 mo.",

author = "Lai, {K. T.} and Haywood, {S. K.} and R. Gupta and M. Missous",

year = "2003",

month = aug,

day = "1",

doi = "10.1049/ip-opt:20030409",

language = "English",

volume = "150",

pages = "377--380",

journal = "IEE Proceedings: Optoelectronics",

issn = "1350-2433",

publisher = "IEEE",

number = "4",

}

TY - JOUR

T1 - Observation of intersubband absorption in the forbidden polarisation for a stepped double barrier quantum well

AU - Lai, K. T.

AU - Haywood, S. K.

AU - Gupta, R.

AU - Missous, M.

PY - 2003/8/1

Y1 - 2003/8/1

N2 - Intersubband absorption in the conduction band of a series of double barrier multiple quantum wells has been studied. Absorption in the forbidden polarisation was observed for a GaAs/InxGa(1-x)As/AlAs/AlyGa(1-y) As stepped well using 45° waveguide geometry. This is attributed to the relaxation of the polarisation selection rule. This corroborates the authors' previous observation of enhanced absorption at the Brewster angle in these structures. In 45° waveguide geometry, it is possible to resolve Γ(well)-X(AlAs) transitions in some samples. The observed energies of both Γ-Γ and Γ-X transitions are in good agreement with the proposed theoretical model using an X-band effective mass of 0.4 mo.

AB - Intersubband absorption in the conduction band of a series of double barrier multiple quantum wells has been studied. Absorption in the forbidden polarisation was observed for a GaAs/InxGa(1-x)As/AlAs/AlyGa(1-y) As stepped well using 45° waveguide geometry. This is attributed to the relaxation of the polarisation selection rule. This corroborates the authors' previous observation of enhanced absorption at the Brewster angle in these structures. In 45° waveguide geometry, it is possible to resolve Γ(well)-X(AlAs) transitions in some samples. The observed energies of both Γ-Γ and Γ-X transitions are in good agreement with the proposed theoretical model using an X-band effective mass of 0.4 mo.

UR - http://www.scopus.com/inward/record.url?scp=0345328307&partnerID=8YFLogxK

U2 - 10.1049/ip-opt:20030409

DO - 10.1049/ip-opt:20030409

M3 - Article

AN - SCOPUS:0345328307

SN - 1350-2433

VL - 150

SP - 377

EP - 380

JO - IEE Proceedings: Optoelectronics

JF - IEE Proceedings: Optoelectronics

IS - 4

ER -

Observation of intersubband absorption in the forbidden polarisation for a stepped double barrier quantum well

Abstract

Access to Document

Other files and links

Fingerprint

Cite this