Characterization of aminopyridinium based organic crystals for THz generation

被引：1

作者：

Mandagathingal, Hijas Kalattummal ^{[1
,2
,3
]}

Li, Shaoxian ^{[2
,3
]}

Vediyappan, Sivasubramani ^{[6
]}

Pichan, Karuppasamy ^{[6
]}

Pandian, Muthu Senthil ^{[6
]}

Perumalsamy, Ramasamy ^{[6
]}

Nugraha, Priyo Syamsul ^{[3
,4
]}

Polonyi, Gyula ^{[3
,4
]}

Fulop, Jozsef Andras ^{[3
,4
,5
]}

Ramamoorthy, Nagalakshmi ^{[1
]}

机构：

[1] Natl Inst Technol, Dept Phys, Tiruchirappalli 620015, Tamil Nadu, India

[2] Univ Pecs, Inst Phys, H-7624 Pecs, Hungary

[3] Univ Pecs, Szentagothai Res Ctr, H-7624 Pecs, Hungary

[4] MTA PTE High Field Terahertz Res Grp, H-7624 Pecs, Hungary

[5] ELI HU Nonprofit Ltd, ELI ALPS, H-6728 Szeged, Hungary

[6] SSN Coll Engn, SSN Res Ctr, Chennai 603110, Tamil Nadu, India

来源：

OPTICS AND LASER TECHNOLOGY | 2020年 / 131卷

关键词：

THz generation; Optical rectification; Organic crystals; Nonlinear optics; Time domain terahertz spectroscopy; DISTORTION-FREE ENHANCEMENT; ENERGY TERAHERTZ PULSES; OPTICAL RECTIFICATION; TIME-DOMAIN; EFFICIENT GENERATION; PHONON MODES; DAST; GROWTH; DSTMS;

D O I：

10.1016/j.optlastec.2020.106394

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Two aminopyridinium based novel organic materials, 2-amino-5-nitropyridinium p-phenolsulfonate (2A5NPP) and 2,6-diaminopyridinium-4-nitrophenolate-4-nitrophenol (DAP+NP-NP) were characterized in the 0-2 THz range by time-domain terahertz (THz) spectroscopy. Density functional theory calculations were carried out to find the molecular vibrational modes of the materials in 0-15 THz range and partially compared with the experimental results. THz absorption peaks were assigned to molecular vibration modes. THz pulse generation by optical rectification in both materials was studied using optical pump pulses of 1030 nm wavelength. The anisotropy of THz generation was investigated in detail by rotating the polarization of the optical pump with respect to the crystal axes.

引用

页数：8

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