We induce ultrafast magneto-photocurrents in a GaAs crystal employing interband excitation with femtosecond laser pulses at room temperature and non-invasively separate surface and bulk contributions to the overall current response. The separation between the different symmetry contributions is achieved by measuring the simultaneously emitted terahertz radiation for different sample orientations. Excitation intensity and photon energy dependences of the magneto-photocurrents for linearly and circularly polarized excitations reveal an involvement of different microscopic origins, one of which is the inverse spin Hall effect. Our experiments are important for a better understanding of the complex momentum-space carrier dynamics in magnetic fields.

1.
V. I.
Belinicher
and
B. I.
Sturman
, “
The photogalvanic effect in media lacking a center of symmetry
,”
Sov. Phys. Usp.
23
,
199
(
1980
).
2.
S. D.
Ganichev
and
W.
Prettl
, “
Spin photocurrents in quantum wells
,”
J. Phys. Condens. Matter
15
,
R935
(
2003
).
3.
S. D.
Ganichev
,
E. L.
Ivchenko
,
V. V.
Bel'kov
,
S. A.
Tarasenko
,
M.
Sollinger
,
D.
Weiss
,
W.
Wegscheider
, and
W.
Prettl
, “
Spin-galvanic effect
,”
Nature
417
,
153
(
2002
).
4.
J. E.
Sipe
and
A. I.
Shkrebtii
, “
Second-order optical response in semiconductors
,”
Phys. Rev. B
61
,
5337
(
2000
).
5.
L. I.
Magarill
and
M. V.
Éntin
, “
Surface photogalvanic effect in metals
,”
Sov. Phys. JETP
54
,
531
(
1981
).
6.
V. L.
Alperovich
,
V. I.
Belinicher
,
V. N.
Novikov
, and
A. S.
Terekhov
, “
Photogalvanic effects investigation in gallium arsenide
,”
Ferroelectrics
45
,
1
(
1982
).
7.
V. L.
Alperovich
,
A. O.
Minaev
, and
A. S.
Terekhov
, “
Ballistic electron transport through epitaxial GaAs films in a magnetically induced surface photocurrent
,”
JETP Lett.
49
,
702
(
1989
), see http://www.jetpletters.ac.ru/ps/1122/article_16999.shtml.
8.
A. V.
Andrianov
,
E. V. V.
Beregulin
,
Y. B.
Lyanda-Geller
,
I. D. D.
Yaroshetskii
, and
Y. B.
Layanda-Geller
, “
Magnetic-field-induced photovoltaic effect in p-type gallium arsenide
,”
Sov. Phys. JETP
75
,
921
(
1992
), see http://www.jetp.ac.ru/cgi-bin/e/index/e/75/5/p921?a=list.
9.
A. A.
Bakun
,
B. P.
Zakharchenya
,
A. A.
Rogachev
,
M. N.
Tkachuk
, and
V. G.
Fleischer
, “
Observation of a surface photocurrent caused by optical orientation of electrons in a semiconductor
,”
JETP Lett.
40
,
1293
(
1984
), see http://www.jetpletters.ac.ru/ps/1262/article_19087.shtml.
10.
E. L.
Ivchenko
,
Y. B.
Lyanda-Geller
, and
G. E.
Pikus
, “
Magneto-photogalvanic effects in noncentrosymmetric crystals
,”
Ferroelectrics
83
,
19
(
1988
).
11.
S. B.
Astaf'ev
,
V. M.
Fridkin
,
V. G.
Lazarev
, and
A. L.
Shlensky
, “
Magnetophotovoltaic effect in crystals without a center of symmetry
,”
Ferroelectrics
83
,
3
(
1988
).
12.
N. S.
Averkiev
and
M. I.
D'yakonov
, “
Current due to inhomogeneity of the spin orientation of electrons in a semiconductor
,”
Sov. Phys. Semicond.
17
,
393
(
1983
).
13.
V. V.
Bel'kov
,
S. D.
Ganichev
,
E. L.
Ivchenko
,
S. A.
Tarasenko
,
W.
Weber
,
S.
Giglberger
,
M.
Olteanu
,
H.-P.
Tranitz
,
S. N.
Danilov
,
P.
Schneider
,
W.
Wegscheider
,
D.
Weiss
, and
W.
Prettl
, “
Magneto-gyrotropic photogalvanic effects in semiconductor quantum wells
,”
J. Phys. Condens. Matter
17
,
3405
(
2005
).
14.
E. L.
Ivchenko
,
Y. B.
Lyanda-Geller
, and
G. E.
Pikus
, “
Circular magnetophotocurrent and spin splitting of band states in optically-inactive crystals
,”
Solid State Commun.
69
,
663
(
1989
).
15.
K.
Ando
and
E.
Saitoh
, “
Observation of the inverse spin Hall effect in silicon
,”
Nat. Commun.
3
,
629
(
2012
).
16.
T.
Jungwirth
,
J.
Wunderlich
, and
K.
Olejník
, “
Spin Hall effect devices
,”
Nat. Mater.
11
,
382
(
2012
).
17.
P. C. M.
Planken
,
H.-K.
Nienhuys
,
H. J.
Bakker
, and
T.
Wenckebach
, “
Measurement and calculation of the orientation dependence of terahertz pulse detection in ZnTe
,”
J. Opt. Soc. Am. B
18
,
313
(
2001
).
18.
D.
Côté
,
N.
Laman
, and
H. M.
van Driel
, “
Rectification and shift currents in GaAs
,”
Appl. Phys. Lett.
80
,
905
(
2002
).
19.
See supplementary material at http://dx.doi.org/10.1063/1.4917568 for suppressing unwanted signals.
20.
X.-C.
Zhang
,
Y.
Jin
,
T. D.
Hewitt
,
T.
Sangsiri
,
L. E.
Kingsley
, and
M.
Weiner
, “
Magnetic switching of THz beams
,”
Appl. Phys. Lett.
62
,
2003
(
1993
).
21.
M.
Johnston
,
D.
Whittaker
,
A.
Corchia
,
A.
Davies
, and
E.
Linfield
, “
Simulation of terahertz generation at semiconductor surfaces
,”
Phys. Rev. B
65
,
165301
(
2002
).
22.
J. V.
Rudd
,
J. L.
Johnson
, and
D. M.
Mittleman
, “
Quadrupole radiation from terahertz dipole antennas
,”
Opt. Lett.
25
,
1556
(
2000
).
23.
H.
Füser
and
M.
Bieler
, “
Terahertz beam steering by optical coherent control
,”
Appl. Phys. Lett.
102
,
251109
(
2013
).
24.
B. B.
Krichevtsov
,
R. V.
Pisarev
,
A. A.
Rzhevskii
, and
H.-J.
Weber
, “
Manifestation of magnetically induced spatial dispersion in the cubic semiconductors ZnTe, CdTe, and GaAs
,”
J. Exp. Theor. Phys. Lett.
69
,
551
(
1999
).
25.
J. S.
Blakemore
, “
Semiconducting and other major properties of gallium arsenide
,”
J. Appl. Phys.
53
,
R123
(
1982
).
26.
M.
Bieler
,
K.
Pierz
, and
U.
Siegner
, “
Simultaneous generation of shift and injection currents in (110)-grown GaAs∕AlGaAs quantum wells
,”
J. Appl. Phys.
100
,
083710
(
2006
).
27.
M.
Ehlert
,
C.
Song
,
M.
Ciorga
,
T.
Hupfauer
,
J.
Shiogai
,
M.
Utz
,
D.
Schuh
,
D.
Bougeard
, and
D.
Weiss
, “
All-electrical detection of spin Hall effect in semiconductors
,”
Phys. Status Solidi
251
,
1725
(
2014
).

Supplementary Material

You do not currently have access to this content.