全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

InAs0.96Sb0.04红外薄膜的光学性质研究

Keywords: InAsSb,光学常数,椭偏光谱,液相外延,红外,薄膜的光学性质,研究,OPTICALPROPERTIES,THINFILMS,方向,能量简并,鞍点,对应,布里渊区,发生,电子跃迁,实验数据,结果,临界点,计算,拟合,模型,度理论,子带间跃迁

Full-Text   Cite this paper   Add to My Lib

Abstract:

采用水平滑移石墨舟液相外延生长技术在n型(100)InAs衬底上生长了InAs0.96Sb0.04薄膜.在1.5~5.5eV光子能量范围采用紫外-可见光椭圆偏振光谱仪于室温下测试了其介电函数谱ε(E).基于电子带间跃迁和联合态密度理论,采用S.Adachi的MDF模型对ε(E)进行了拟合,并计算了各种临界点电子跃迁对ε(E)的贡献.结果表明:实验数据与模型吻合得非常好,E1和E1Δ1跃迁发生在布里渊区(BZ)的Λ轴或L点,分别对应于M1型临界点Λv5→Λc6(或Lv4.5→Lc6)和Λv6→Λc6(或Lv6→Lc6)跃迁;E2跃迁是由于M1型和M2型鞍点能量简并引起的,沿着BZ的Σ和Δ轴方向.

References

[1]  Gao Y Z, Gong X Y, Gui Y S, et al. Electrical properties of meh-epitaxy-grown InAs0.04Sb0.96 Layers with cutoff wavelengthof 12μm [J]. Jpn. J. Appl. Phys. 2004, 43(3): 1051-1054.
[2]  Kim J D, Kim S, Wu D, et al. 8- 13μm InAsSb heterojunction photodiode operating at near room temperature [J]. Appl. Phys. Lett. 1995, 67(18): 2645-2647.
[3]  李国华 陈哗 方再利 等.半导体低维结构的压力光谱研究[J].红外与毫米波学报,2005,24(3):174—178.
[4]  Hung W K, Chem M Y, Chen Y F, et al. Optical properties of GaAs(1-x)Nx on GaAs [J]. Phys. Rev. B, 2000, 62 (19) : 13028-13033.
[5]  Aspnes D E, Studna A A. Dielectric functions and optical parameters of Si, Ge, GaP, GaAs, GaSb, InP, InAs, and InSbfrom 1.5 to 6.0 Ev [J]. Phys. Rev. B, 1983, 27(2) : 985-1009.
[6]  Deng H Y, Dai N. High-lying interband transitions and optical properties of InAs(1 -x) Sbx films [ J ]. Phys. Rev. B, 2006, 73: 113102.
[7]  Adachi S. Model dielectric constants of GaP, GaAs, GaSb, InP, InAs, and InSb [J]. Phys. Rev. B, 1987, 35(14): 7454-7463.
[8]  Adachi S. Optical properties of AlxGa(1-x) As alloys [ J ]. Phys. Rev. B, 1988, 38(17): 12345-12352.
[9]  Brust D, Phillips J C, Bassani F. Critical points and ultraviolet reflectivity of semiconductors [ J ]. Phys. Rev. Lett. 1962, 9(3) : 94-97.
[10]  Rakovska A, Berger V, Marcadet X, et al. Room temperature InAsSb photovoltaic midinfrared detector [ J ]. Appl. Phys. Left. 2000, 77 (3) : 397-399.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133