Spin relaxation by transient monopolar and bipolar optical orientation

B. N. Murdin; K. Litvinenko; D. G. Clarke; C. R. Pidgeon; P. Murzyn; P. J. Phillips; D. Carder; G. Berden; B. Redlich; A. F G Van Der Meer; S. Clowes; J. J. Harris; L. F. Cohen; T. Ashley; L. Buckle

doi:10.1103/PhysRevLett.96.096603

Spin relaxation by transient monopolar and bipolar optical orientation

B. N. Murdin, K. Litvinenko, D. G. Clarke, C. R. Pidgeon, P. Murzyn, P. J. Phillips, D. Carder, G. Berden, B. Redlich, A. F G Van Der Meer, S. Clowes, J. J. Harris, L. F. Cohen, T. Ashley, L. Buckle

School of Engineering & Physical Sciences

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

12 Citations (Scopus)

Abstract

We have used two-color time-resolved spectroscopy to measure the relaxation of electron spin polarizations in a bulk semiconductor. The circularly polarized pump beam induces a polarization either by direct excitation from the valence band, or by free-carrier (Drude) absorption when tuned to an energy below the band gap. We find that the spin relaxation time, measured with picosecond time resolution by resonant induced Faraday rotation in both cases, increases in the presence of photogenerated holes. In the case of the material chosen, n-InSb, the increase was from 14 to 38 ps. © 2006 The American Physical Society.

Original language	English
Article number	096603
Pages (from-to)	1-4
Number of pages	4
Journal	Physical Review Letters
Volume	96
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.96.096603
Publication status	Published - 2006

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10.1103/PhysRevLett.96.096603

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Murdin, B. N., Litvinenko, K., Clarke, D. G., Pidgeon, C. R., Murzyn, P., Phillips, P. J., Carder, D., Berden, G., Redlich, B., Van Der Meer, A. F. G., Clowes, S., Harris, J. J., Cohen, L. F., Ashley, T., & Buckle, L. (2006). Spin relaxation by transient monopolar and bipolar optical orientation. Physical Review Letters, 96(9), 1-4. Article 096603. https://doi.org/10.1103/PhysRevLett.96.096603

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title = "Spin relaxation by transient monopolar and bipolar optical orientation",

abstract = "We have used two-color time-resolved spectroscopy to measure the relaxation of electron spin polarizations in a bulk semiconductor. The circularly polarized pump beam induces a polarization either by direct excitation from the valence band, or by free-carrier (Drude) absorption when tuned to an energy below the band gap. We find that the spin relaxation time, measured with picosecond time resolution by resonant induced Faraday rotation in both cases, increases in the presence of photogenerated holes. In the case of the material chosen, n-InSb, the increase was from 14 to 38 ps. {\textcopyright} 2006 The American Physical Society.",

author = "Murdin, {B. N.} and K. Litvinenko and Clarke, {D. G.} and Pidgeon, {C. R.} and P. Murzyn and Phillips, {P. J.} and D. Carder and G. Berden and B. Redlich and {Van Der Meer}, {A. F G} and S. Clowes and Harris, {J. J.} and Cohen, {L. F.} and T. Ashley and L. Buckle",

year = "2006",

doi = "10.1103/PhysRevLett.96.096603",

language = "English",

volume = "96",

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journal = "Physical Review Letters",

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T1 - Spin relaxation by transient monopolar and bipolar optical orientation

AU - Murdin, B. N.

AU - Litvinenko, K.

AU - Clarke, D. G.

AU - Pidgeon, C. R.

AU - Murzyn, P.

AU - Phillips, P. J.

AU - Carder, D.

AU - Berden, G.

AU - Redlich, B.

AU - Van Der Meer, A. F G

AU - Clowes, S.

AU - Harris, J. J.

AU - Cohen, L. F.

AU - Ashley, T.

AU - Buckle, L.

PY - 2006

Y1 - 2006

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AB - We have used two-color time-resolved spectroscopy to measure the relaxation of electron spin polarizations in a bulk semiconductor. The circularly polarized pump beam induces a polarization either by direct excitation from the valence band, or by free-carrier (Drude) absorption when tuned to an energy below the band gap. We find that the spin relaxation time, measured with picosecond time resolution by resonant induced Faraday rotation in both cases, increases in the presence of photogenerated holes. In the case of the material chosen, n-InSb, the increase was from 14 to 38 ps. © 2006 The American Physical Society.

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U2 - 10.1103/PhysRevLett.96.096603

DO - 10.1103/PhysRevLett.96.096603

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VL - 96

SP - 1

EP - 4

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

M1 - 096603

ER -

Spin relaxation by transient monopolar and bipolar optical orientation

Abstract

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