Polarization control of terahertz wave is a challenging subject in terahertz science and technology. Here, we report a simple method to control polarization state of the terahertz wave in terahertz generation process. At room temperature, terahertz radiation from a noncentrosymmetric and chiral oxide, sillenite Bi12GeO20, is observed by the irradiation of linearly polarized femtosecond laser pulses at 800 nm. The polarization state of the emitted terahertz wave is found to be elliptic with an ellipticity of ∼0.37 ± 0.10. Furthermore, the ellipticity was altered to a nearly zero (∼0.01 ± 0.01) by changing the polarization of the incident linearly polarized femtosecond laser pulses. Such a terahertz radiation characteristic is attributable to variation of the polarization state of the emitted terahertz waves, which is induced by retardation due to the velocity mismatch between the incident femtosecond laser pulse and generated terahertz wave and by the polarization tilting due to the optical activity at 800 nm.
References
1.
M.
Tonouchi
, “Cutting-edge terahertz technology
,” Nat. Photonics
1
, 97
(2007
).2.
I. H.
Libon
, S.
Baumgärtner
, M.
Hempel
, N. E.
Hecker
, J.
Feldmann
, M.
Koch
, and P.
Dawson
, “An optically controllable terahertz filter
,” Appl. Phys. Lett.
76
, 2821
(2000
).3.
T.
Kleine-Ostmanna
, P.
Dawson
, K.
Pierz
, and G.
Hein
, “Room-temperature operation of an electrically driven terahertz modulator
,” Appl. Phys. Lett.
84
, 3555
(2004
).4.
R.
Kersting
, G.
Strasser
, and K.
Unterrainer
, “Terahertz phase modulator
,” Electron. Lett.
36
, 1156
(2000
).5.
H.-T.
Chen
, W. J.
Padilla
, J. M. O.
Zide
, A. C.
Gossard
, A. J.
Taylor
, and R. D.
Averitt
, “Active terahertz metamaterial devices
,” Nature (London)
444
, 597
(2006
).6.
F.
Miyamaru
and M.
Hangyo
, “Strong optical activity in chiral metamaterials of metal screw hole arrays
,” Appl. Phys. Lett.
89
, 211105
(2006
).7.
H.-T.
Chen
, W. J.
Padilla
, M. J.
Cich
, A. K.
Azad
, R. D.
Averitt
, and A. J.
Taylor
, “A metamaterial solid-state terahertz phase modulator
,” Nat. Photonics
3
, 148
(2009
).8.
S.
Zhang
, J.
Zhou
, Y.-S.
Park
, J.
Rho
, R.
Singh
, S.
Nam
, A. K.
Azad
, H.-T.
Chen
, X.
Yin
, A. J.
Taylor
, and X.
Zhang
, “Photoinduced handedness switching in terahertz chiral metamolecules
,” Nat. Commun.
3
, 942
(2012
).9.
L.
Ren
, C.
Layla
, G.
Booshehri
, W. D.
Rice
, X.
Wang
, D. J.
Hilton
, K.
Takeya
, I.
Kawayama
, M.
Tonouchi
, R. H.
Hauge
, and J.
Kono
, “Carbon nanotube terahertz polarizer
,” Nano Lett.
9
, 2610
(2009
).10.
L.
Ren
, C. L.
Pint
, T.
Arikawa
, K.
Takeya
, I.
Kawayama
, M.
Tonouchi
, R. H.
Hauge
, and J.
Kono
, “Broadband terahertz polarizers with ideal performance based on aligned carbon nanotube stacks
,” Nano Lett.
12
, 787
(2012
).11.
E.
Castro-Camus
, J.
Lloyd-Hughes
, L.
Fu
, H. H.
Tan
, C.
Jagadish
, and M. B.
Johnston
, “An ion-implanted InP receiver for polarization resolved terahertz spectroscopy
,” Opt. Express
15
, 7047
(2007
).12.
J.
Lloyd-Hughes
, S. P. P.
Jones
, E.
Castro-Camus
, K. I.
Doig
, and J. L.
MacManus-Driscoll
, “Modifying the polarization state of terahertz radiation using anisotropic twin-domains in LaAlO3
,” Opt. Lett.
39
, 1121
(2014
).13.
P. C. M.
Planken
, I.
Brener
, M. C.
Nuss
, M. S. C.
Luo
, and S. L.
Chuang
, “Coherent control of terahertz charge oscillations in a coupled quantum well using phase-locked optical pulses
,” Phys. Rev. B
48
, 4903
(1993
).14.
N.
Amer
, W. C.
Hurlbut
, B. J.
Norton
, and Y.
Lee
, “Generation of terahertz pulses with arbitrary elliptical polarization
,” Appl. Phys. Lett.
87
, 221111
(2005
).15.
J.
Dai
, N.
Karpowicz
, and X.-C.
Zhang
, “Coherent polarization control of terahertz waves generated from two-color laser-induced gas plasma
,” Phys. Rev. Lett.
103
, 023001
(2009
).16.
J.
Nishitani
, T.
Nagashima
, and M.
Hangyo
, “Coherent control of terahertz radiation from antiferromagnetic magnons in NiO excited by optical laser pulses
,” Phys. Rev. B
85
, 174439
(2012
).17.
N.
Kanda
, T.
Higuchi
, H.
Shimizu
, K.
Konishi
, K.
Yoshioka
, and M.
Kuwata-Gonokami
, “The vectorial control of magnetization by light
,” Nat. Commun.
2
, 362
(2011
).18.
R.
Takeda
, N.
Kida
, M.
Sotome
, Y.
Matsui
, and H.
Okamoto
, “Circularly polarized narrowband terahertz radiation from a eulytite oxide by a pair of femtosecond laser pulses
,” Phys. Rev. A
89
, 033832
(2014
).19.
M.
Sato
, T.
Higuchi
, N.
Kanda
, K.
Konishi
, K.
Yoshioka
, T.
Suzuki
, K.
Misawa
, and M.
Kuwata-Gonokami
, “Terahertz polarization pulse shaping with arbitrary field control
,” Nat. Photonics
7
, 724
(2013
).20.
D. J.
Caldwell
and H.
Eyring
, Theory of Optical Activity
(John Wiley & Sons Inc.
, New York
, 1971
).21.
A.
Papakostas
, A.
Potts
, D. M.
Bagnall
, S. L.
Prosvirnin
, H. J.
Coles
, and N. I.
Zheludev
, “Optical manifestations of planar chirality
,” Phys. Rev. Lett.
90
, 107404
(2003
).22.
S.
Bordács
, I.
Kézsmárki
, D.
Szaller
, L.
Demkó
, N.
Kida
, H.
Murakawa
, Y.
Onose
, R.
Shimano
, T.
Rõõm
, U.
Nagel
, S.
Miyahara
, N.
Furukawa
, and Y.
Tokura
, “Chirality of matter shows up via spin excitation
,” Nat. Phys.
8
, 734
(2012
).23.
V. I.
Burkov
, A. V.
Egorysheva
, and Yu. F.
Kargin
, “Optical and chiro-optical properties of crystals with sillenite structure
,” Crystallogr. Rep.
46
, 312
(2001
).24.
P. V.
Lenzo
, E. G.
Spencer
, and A. A.
Ballman
, “Optical activity and electrooptic effect in bismuth germanium oxide (Bi12GeO20)
,” Appl. Opt.
5
, 1688
(1966
).25.
P.
Bayvel
, M.
McCall
, and R. V.
Wright
, “Continuous method for measuring the electro-optic coefficient in Bi12SiO20 and Bi12GeO20
,” Opt. Lett.
13
, 27
(1988
).26.
27.
See supplementary material at http://dx.doi.org/10.1063/1.4932378 for the details of estimation of complex optical constants in terahertz and visible frequency regions, laser power dependence of terahertz radiation, and estimation of coherence length and effective generation length for terahertz radiation.
28.
W.
Wojdowski
, “Vibrational modes in Bi12GeO20 and Bi12SiO20 crystals
,” Phys. Status Solidi B
130
, 121
(1985
).29.
V.
Burkov
, V. S.
Gorelik
, A. V.
Egorysheva
, and Yu. F.
Kargin
, “Laser Raman spectroscopy of crystals with the structure of sillenite
,” J. Russ. Laser Res.
22
, 243
(2001
).30.
A.
Nahata
, A. S.
Weling
, and T. F.
Heinz
, “A wideband coherent terahertz spectroscopy system using optical rectification and electro-optic sampling
,” Appl. Phys. Lett.
69
, 2321
(1996
).31.
A.
Schneider
, M.
Neis
, M.
Stillhart
, B.
Ruiz
, R. U. A.
Khan
, and P.
Günter
, “Generation of terahertz pulses through optical rectification in organic DAST crystals: Theory and experiment
,” J. Opt. Soc. Am. B
23
, 1822
(2006
).32.
M.
Sotome
, N.
Kida
, R.
Takeda
, and H.
Okamoto
, “Terahertz radiation induced by coherent phonon generation via impulsive stimulated Raman scattering in paratellurite
,” Phys. Rev. A
90
, 033842
(2014
).© 2015 AIP Publishing LLC.
2015
AIP Publishing LLC
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