Open Access
Open access
EPJ Web of Conferences, volume 149, pages 5005

The nonlinearity of the refractive index of optical media in the terahertz spectral range

Tcypkin Anton N. 1
, 
Siddiqui M 2
, 
Choudhary S. 2
, 
Drozdov A.A. 1
, 
Bespalov V.G. 1
, 
Putilin Sergey E. 1
, 
Kulya M.S. 1
, 
Zhao Jiapeng 2
, 
Boyd Robert W. 2
, 
Zhang X. 3, 4
, 
Kozlov S. 1
1
 
2
 
Institute of Optics, University of Rochester, Rochester NY, USA | 
3
 
Institute of Optics, University of Rochester, Rochester, NY USA | 
4
 
Publication type: Journal Article
Publication date: 2017-08-04
Quartile SCImago
—
Quartile WOS
—
Impact factor: —
ISSN: 21016275, 2100014X
General Medicine
Abstract
Recently, great progress has been made in the generation of high-intensity terahertz (THz) radiation, which has led to the opportunity to explore non-linear processes in the THz frequency range [1]. A key parameter characterizing the nonlinear response of a material is the non-linear refractive index, denoted as n2. It has been predicted theoretically [2] that the THz nonlinear response of crystals is extremely large as a consequence of a strong vibrational contribution. An indirect assessment of n2 for lithium niobate at THz frequencies was reported in [3], leading to a value of approximately 10cm/W. We find that n2 = 4.0 × 10сm/W, which is approximately 3 orders of magnitude larger that the value 2.4×10 cm/W in the NIR spectral range [4]. The present paper is devoted to theoretical analysis and a direct experimental measurement of n2 for crystalline ZnSe in the THz spectral range. In this paper, we also consider the special aspects of self-action of single-cycle waves in media with given nonlinearities. It is shown that self-focusing efficiency in transparent dispersive medium decreases when the number of oscillations in input radiation is decreased for few-cycle paraxial waves with the same maximum electric field and transverse size, i.e., with the same ratio of the radiation power to the critical self-focusing power.
By date By citations
By date By citations
  • We do not take into account publications that without a DOI.
  • Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
  • Statistics recalculated weekly.
Metrics
Share
Cite this
GOST |
Cite this
GOST Copy
Siddiqui M. et al. The nonlinearity of the refractive index of optical media in the terahertz spectral range // EPJ Web of Conferences. 2017. Vol. 149. p. 5005.
GOST all authors (up to 50) Copy
Siddiqui M., Drozdov A., Choudhary S., Bespalov V., Tcypkin A. N., Putilin S. E., Kulya M., Zhao J., Boyd R. W., Zhang X., Kozlov S. The nonlinearity of the refractive index of optical media in the terahertz spectral range // EPJ Web of Conferences. 2017. Vol. 149. p. 5005.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1051/epjconf/201714905005
UR - https://doi.org/10.1051%2Fepjconf%2F201714905005
TI - The nonlinearity of the refractive index of optical media in the terahertz spectral range
T2 - EPJ Web of Conferences
AU - Siddiqui, M
AU - Drozdov, A.A.
AU - Choudhary, S.
AU - Bespalov, V.G.
AU - Tcypkin, Anton N.
AU - Putilin, Sergey E.
AU - Kulya, M.S.
AU - Zhao, Jiapeng
AU - Boyd, Robert W.
AU - Zhang, X.
AU - Kozlov, S.
PY - 2017
DA - 2017/08/04 00:00:00
PB - EDP Sciences
SP - 5005
VL - 149
SN - 2101-6275
SN - 2100-014X
ER -
BibTex
Cite this
BibTex Copy
@article{2017_Siddiqui,
author = {M Siddiqui and A.A. Drozdov and S. Choudhary and V.G. Bespalov and Anton N. Tcypkin and Sergey E. Putilin and M.S. Kulya and Jiapeng Zhao and Robert W. Boyd and X. Zhang and S. Kozlov},
title = {The nonlinearity of the refractive index of optical media in the terahertz spectral range},
journal = {EPJ Web of Conferences},
year = {2017},
volume = {149},
publisher = {EDP Sciences},
month = {aug},
url = {https://doi.org/10.1051%2Fepjconf%2F201714905005},
pages = {5005},
doi = {10.1051/epjconf/201714905005}
}
Found error?