Spin relaxation in InSb and InAs by 1- And 2-colour spectroscopy with free electron and solid state lasers

C. R. Pidgeon, P. Murzyn, P. J. Phillips, B. N. Murdin, K. Litvinenko, M. Merrick, L. F. Cohen, T. Zhang, S. K. Clowes, P. Buckle, T. Ashley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report time-resolved measurement of spin lifetimes in both bulk and quantum well narrow gap semiconductors (NGSs) at 300K. We have used both free electron and solid state laser sources from 3 to 7 µm and quarter wave plates to produce circularly polarised pump and probe beams. We previously demonstrated that spin flip (Elliott-Yafet, EY) scattering dominates in Hg 0.78Cd0.22Te due to strong lattice scattering. In contrast, spin unphasing (D'Yakonov-Perel, DP) scattering controls the loss of polarisation in intrinsic InSb and InAs due to the higher mobility, giving spin lifetimes, ts, of ~20ps at 300K. We report first measurements of ts of - 17ps in InSb/InAlSb quantum wells. © 2004 IEEE.

Original languageEnglish
Title of host publicationConference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics
Pages207-208
Number of pages2
Publication statusPublished - 2004
EventConference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics - Karlsruhe, Germany
Duration: 27 Sep 20041 Oct 2004

Conference

ConferenceConference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics
CountryGermany
CityKarlsruhe
Period27/09/041/10/04

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    Pidgeon, C. R., Murzyn, P., Phillips, P. J., Murdin, B. N., Litvinenko, K., Merrick, M., Cohen, L. F., Zhang, T., Clowes, S. K., Buckle, P., & Ashley, T. (2004). Spin relaxation in InSb and InAs by 1- And 2-colour spectroscopy with free electron and solid state lasers. In Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics (pp. 207-208)