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.com
Volume 3, Issue 2
ISSN: 2470-9905
Crystallography 2017
October 16-17, 2017
2
nd
International Conference on
October 16-17, 2017 | Chicago, USA
Applied Crystallography
Evaluation of ZnGeP
2
andDASTcrystals foroptical rectificationbasedTHz generationusingFemtoseconds
amplifier
A.K. Chaudhary
1
, K.S. Rao
1
, K. Thirupugalmani
2
,
and
S. Brahadeeswaran
2
1
University of Hyderabad, India
2
Anna University, India
T
he paper reports the evaluation of ZGP and DAST, two different types of nonlinear crystals for the generation of efficient THz
generation using 1.3 µm wavelength obtained from 60 fs Ti: sapphire amplifiers at 1 kHz repetition rate. DAST is a positive
biaxial organic crystal with very high deff. values whereas ZGP is a positive uniaxial semiconductor crystal with moderate deff. value.
It has been observed that figure of merit (FOM) of these crystals along with the coherence length (l
c
) provide complete information
about their utility as a potential source of THz generation. The FOM of DAST and ZGP in THz domain are theoretically calculated
and correlated to their experimental values of conversion efficiency. The FOM of DAST is almost 372.12 times higher than the ZGP
but experimental THz conversion efficiency in both the case are similar and << 1 % .Theoretical and experimental data of DAST and
ZGP crystals are comprised in Table 1 .We investigated the role of refractive indices of these crystals in optical and THz domain and
corresponding coherence length (l
c
) to understand the THz conversion efficiency .
akcphys@gmail.comStruct Chem Crystallogr Commun, 3:2
DOI: 10.21767/2470-9905-C1-003