Midinfrared absorption by InAs/GaSb type-II superlattices

Li, L. L.; Xu, W.; Zhang, J.; Shi, Y. L.
January 2009
Journal of Applied Physics;Jan2009, Vol. 105 Issue 1, p013115
Academic Journal
We present a systematic theoretical study on optical properties of short-period InAs/GaSb type-II superlattices (SLs) which can serve for midinfrared (MIR) detection. Using the standard Kronig–Penney model we calculate the miniband structure of such SLs. The obtained band-gap energies are in line with those realized experimentally. On the basis of the energy-balance equation derived from the Boltzmann equation we develop a simple approach to calculate the optical absorption coefficient for the corresponding SL systems. Our results agree with recent experimental findings. Moreover, the dependence of MIR absorption in InAs/GaSb type-II SLs on temperature and well width are examined. This study is pertinent to the application of InAs/GaSb type-II SLs as MIR photodetectors working in the ambient condition.


Related Articles

  • Cavity-enhanced saturable and two-photon absorption in semiconductors. Herda, Robert; Hakulinen, Tommi; Suomalainen, Soile; Okhotnikov, Oleg G. // Applied Physics Letters;11/21/2005, Vol. 87 Issue 21, p211105 

    Two-photon and saturable absorption are studied by placing GaAs and InGaAs materials in a microcavity. We show that field enhancement occurring due to the cavity influences the threshold and dynamic range of rollover in the nonlinear response. This approach can be used in semiconductor laser...

  • Freestanding diffractive optical elements as light extractors for burning plasma experiments. Stutman, D.; Caravelli, G.; Finkenthal, M.; Wright, G.; Whyte, D.; Moldovan, N.; Kaita, R.; Roquemore, L. // Journal of Applied Physics;May2008, Vol. 103 Issue 9, p093307 

    Optical diagnostics will be critical for the operation and performance assessment of burning plasma experiments, such as ITER. At the same time, extracting light for these diagnostics with reflective mirrors becomes difficult in the burning plasma environment due to the deleterious effects of...

  • X-ray absorption spectroscopy studies of Fe-doped misfit-layered Ca3Co4-xFexO9+δ (x=0, 0.05, 0.1, and 0.15). Liu, Chia-Jyi; Chen, Jeng-Lung; Huang, Li-Chen; Lin, Zhi-Ru; Chang, Ching-Lin // Journal of Applied Physics;7/1/2007, Vol. 102 Issue 1, p014908 

    We have carried out O K- and Co L2,3-edge x-ray absorption studies on misfit-layered oxides of polycrystalline Ca3Co4-xFexO9+δ (x=0,0.05,0.1,0.15). The analyses of integrated absorption intensity show that the number of Co 3d unoccupied states decreases upon partial substitution of Fe for Co,...

  • Absorption and photoluminescence properties of Er-doped and Er/Yb codoped soda-silicate laser glasses. Li, S. F.; Zhang, Q. Y.; Lee, Y. P. // Journal of Applied Physics;11/1/2004, Vol. 96 Issue 9, p4746 

    Er-doped and Er/Yb codoped soda-silicate laser glasses with various concentrations of Er and Yb were fabricated. The absorption and the photoluminescence (PL) spectra were measured and analyzed. For the Er- doped soda-slilicate glasses, the optimum Er concentration for the PL intensity at 1536...

  • Internal laser probing: A theoretical study of wave propagation effects and the physical limits of measurement accuracy. Thalhammer, Robert // Journal of Applied Physics;1/15/2005, Vol. 97 Issue 2, p023102 

    The transient distribution of charge carriers and temperature in semiconductors has become accessible to experiments by internal laser probing techniques that exploit the electro-optical and the thermo-optical effect. In this article, two representative methods, namely free carrier absorption...

  • Tunability range of 245 nm in a diode-pumped Tm:BaY2F8 laser at 1.9 μm: a theoretical and experimental investigation. Coluccelli, N.; Gatti, D.; Galzerano, G.; Cornacchia, F.; Parisi, D.; Toncelli, A.; Tonelli, M.; Laporta, P. // Applied Physics B: Lasers & Optics;Dec2006, Vol. 85 Issue 4, p553 

    Extremely wide wavelength tuning ranges of up to ∼300 nm around 1.9 μm are theoretically predicted in a Tm-doped BaY2F8 crystal, on the basis of near-infrared measurements of emission and absorption cross sections. A tunability interval of 245 nm, from 1849 nm to 2059 nm, has been...

  • Calculation of the intensity and dichroism of the IR absorption bands of oriented polymers. Abdulov, Kh. // Journal of Applied Spectroscopy;Jan2005, Vol. 72 Issue 1, p138 

    An algorithm for calculating the intensity and dichroism of polarized IR absorption bands of oriented polymers is proposed. The absorption curves in the IR spectrum of amorphous cis-1,4-polyisoprene and the dichroism of its absorption bands have been calculated. The polarization IR spectra of...

  • High spatial resolution VAULT H-Lyα observations and multiwavelength analysis of an active region filament. Vial, J.-C.; Olivier, K.; Philippon, A. A.; Vourlidas, A.; Yurchyshyn, V. // Astronomy & Astrophysics / Astronomie et Astrophysique;May2012, Vol. 541, p1 

    Context. The search for the fine structure of prominences has received considerable new attention thanks to the Swedish Solar Telescope (SST) Hα pictures that provide an unsurpassed spatial resolution. Recently, it has been shown that the filaments' coronal environment, at least for quiescent...

  • Fourier transform infrared spectroscopy studies at low temperatures of MPX3 layered compounds. Jouanne, M.; Julien, C. // Journal of Applied Physics;10/1/1988, Vol. 64 Issue 7, p3637 

    Provides information on a study which detailed experimental results in infrared absorption at low temperatures on the layered compounds of the MPX[sub3] (M = Fe, Ni and X = S, Se) family. Cause of the occurrence of absorption bands; Status of the elementary unit cell in sulfur compounds;...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics