TY - JOUR
T1 - Widely tunable surface-emitted monochromatic terahertz-wave generation beyond the Reststrahlen band
AU - Saito, Kyosuke
AU - Tanabe, Tadao
AU - Oyama, Yutaka
N1 - Publisher Copyright:
© 2014 Elsevier B.V.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2015/1/15
Y1 - 2015/1/15
N2 - We proposed a surface-emitted THz-wave generation on the basis of difference frequency mixing in a GaP planar waveguide. By utilizing modal birefringence of fundamental TE and TM modes at telecom wavelengths in the GaP membrane waveguide, phase matching condition for the surface-emitted difference frequency mixing (SE-DFM) can be achieved. THz output power is enhanced near the phonon polariton resonance frequency owing to the strong coupling between the transverse optical (TO) phonon of GaP and THz radiation. The SE-DFM scheme can generate THz waves beyond the Reststrahlen band located between 11 and 12 THz, resulting in widely tunable THz wave generation. Our proposed broadband THz sources can be applicable for optically isotropic nonlinear optical materials such as GaAs and InP as well as GaP.
AB - We proposed a surface-emitted THz-wave generation on the basis of difference frequency mixing in a GaP planar waveguide. By utilizing modal birefringence of fundamental TE and TM modes at telecom wavelengths in the GaP membrane waveguide, phase matching condition for the surface-emitted difference frequency mixing (SE-DFM) can be achieved. THz output power is enhanced near the phonon polariton resonance frequency owing to the strong coupling between the transverse optical (TO) phonon of GaP and THz radiation. The SE-DFM scheme can generate THz waves beyond the Reststrahlen band located between 11 and 12 THz, resulting in widely tunable THz wave generation. Our proposed broadband THz sources can be applicable for optically isotropic nonlinear optical materials such as GaAs and InP as well as GaP.
KW - Difference frequency mixing
KW - Nonlinear optics
KW - Semiconductor waveguide
KW - Terahertz wave
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U2 - 10.1016/j.optcom.2014.09.013
DO - 10.1016/j.optcom.2014.09.013
M3 - Article
AN - SCOPUS:84907833248
VL - 335
SP - 99
EP - 101
JO - Optics Communications
JF - Optics Communications
SN - 0030-4018
ER -