Comparative raman scattering studies of gaas/alxga1-xas and alxga1-xas/alas superlattices

Zhang Wang; Han He-Xiang; Chen Ye; L. I. Guo-Hua; Wang Zhao-Ping

Comparative raman scattering studies of gaas/al_xga_1-xas and al_xga_1-xas/alas superlattices

Zhang Wang^*
, Han He-Xiang
, Chen Ye
, L. I. Guo-Hua
, Wang Zhao-Ping

^*Corresponding author for this work

CAS - Institute of Semiconductors

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

Abstract

The room-temperature Raman scattering studies of longitudinal optic phonons in AlAs/Al_xGa_1-xAs and GaAs/Al_xGai_1-xAs short-period superlattices with different layer thicknesses were reported. The AlAs LO modes confined in AlAs layers and GaAs-like LO modes confined in Al_xGa_1-xAs layers were observed in AlAs/Al_xGa_1-xAs superlattices under off-resonance conditions. And the GaAs LO modes confined in GaAs layers and AlAs-like LO modes confined in Al_xGa_1-xAs layers were observed in GaAs/Al_xGa_1-xAs superlattices. In addition, the AlAs interface mode in AlAs/Al_xGa_1-xAs was also observed under near-resonance conditions. Based on the linear chain mode, the frequencies of confined LO modes measured by Raman scattering were unfolded according to q=m/n+1(2_π/α₀) , by which the dispersion curves of AlAs-like and GaAs-like LO phonons in Al_xGa_1-xAs mixed crystal were obtained.

Original language	English
Pages (from-to)	193-194
Number of pages	2
Journal	Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves
Volume	18
Issue number	3
State	Published - 1999
Externally published	Yes

Keywords

Lo modes
Raman scattering
Superlattices

Cite this

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title = "Comparative raman scattering studies of gaas/alxga1-xas and alxga1-xas/alas superlattices",

abstract = "The room-temperature Raman scattering studies of longitudinal optic phonons in AlAs/AlxGa1-xAs and GaAs/AlxGai1-xAs short-period superlattices with different layer thicknesses were reported. The AlAs LO modes confined in AlAs layers and GaAs-like LO modes confined in AlxGa1-xAs layers were observed in AlAs/AlxGa1-xAs superlattices under off-resonance conditions. And the GaAs LO modes confined in GaAs layers and AlAs-like LO modes confined in AlxGa1-xAs layers were observed in GaAs/AlxGa1-xAs superlattices. In addition, the AlAs interface mode in AlAs/AlxGa1-xAs was also observed under near-resonance conditions. Based on the linear chain mode, the frequencies of confined LO modes measured by Raman scattering were unfolded according to q=m/n+1(2π/α0) , by which the dispersion curves of AlAs-like and GaAs-like LO phonons in AlxGa1-xAs mixed crystal were obtained.",

keywords = "Lo modes, Raman scattering, Superlattices",

author = "Zhang Wang and Han He-Xiang and Chen Ye and Guo-Hua, \{L. I.\} and Wang Zhao-Ping",

year = "1999",

language = "英语",

volume = "18",

pages = "193--194",

journal = "Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves",

issn = "1001-9014",

publisher = "Chinese Optical Society",

number = "3",

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TY - JOUR

T1 - Comparative raman scattering studies of gaas/alxga1-xas and alxga1-xas/alas superlattices

AU - Wang, Zhang

AU - He-Xiang, Han

AU - Ye, Chen

AU - Guo-Hua, L. I.

AU - Zhao-Ping, Wang

PY - 1999

Y1 - 1999

N2 - The room-temperature Raman scattering studies of longitudinal optic phonons in AlAs/AlxGa1-xAs and GaAs/AlxGai1-xAs short-period superlattices with different layer thicknesses were reported. The AlAs LO modes confined in AlAs layers and GaAs-like LO modes confined in AlxGa1-xAs layers were observed in AlAs/AlxGa1-xAs superlattices under off-resonance conditions. And the GaAs LO modes confined in GaAs layers and AlAs-like LO modes confined in AlxGa1-xAs layers were observed in GaAs/AlxGa1-xAs superlattices. In addition, the AlAs interface mode in AlAs/AlxGa1-xAs was also observed under near-resonance conditions. Based on the linear chain mode, the frequencies of confined LO modes measured by Raman scattering were unfolded according to q=m/n+1(2π/α0) , by which the dispersion curves of AlAs-like and GaAs-like LO phonons in AlxGa1-xAs mixed crystal were obtained.

AB - The room-temperature Raman scattering studies of longitudinal optic phonons in AlAs/AlxGa1-xAs and GaAs/AlxGai1-xAs short-period superlattices with different layer thicknesses were reported. The AlAs LO modes confined in AlAs layers and GaAs-like LO modes confined in AlxGa1-xAs layers were observed in AlAs/AlxGa1-xAs superlattices under off-resonance conditions. And the GaAs LO modes confined in GaAs layers and AlAs-like LO modes confined in AlxGa1-xAs layers were observed in GaAs/AlxGa1-xAs superlattices. In addition, the AlAs interface mode in AlAs/AlxGa1-xAs was also observed under near-resonance conditions. Based on the linear chain mode, the frequencies of confined LO modes measured by Raman scattering were unfolded according to q=m/n+1(2π/α0) , by which the dispersion curves of AlAs-like and GaAs-like LO phonons in AlxGa1-xAs mixed crystal were obtained.

KW - Lo modes

KW - Raman scattering

KW - Superlattices

UR - https://www.scopus.com/pages/publications/33746798203

M3 - 文章

AN - SCOPUS:33746798203

SN - 1001-9014

VL - 18

SP - 193

EP - 194

JO - Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves

JF - Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves

IS - 3

ER -

Comparative raman scattering studies of gaas/al_xga_1-xas and al_xga_1-xas/alas superlattices

Abstract

Keywords

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