Feasibility of THz generation from DAST crystal excited by Yb-doped femtosecond laser
-
摘要: 为了获得与掺镱飞秒脉冲激光匹配的高效太赫兹(THz)发射源, 本文根据相位匹配原理, 并结合DAST晶体多声子共振吸收, 模拟了掺镱飞秒激光脉冲激发DAST晶体后获得的THz频谱. 通过与CdTe、GaP等电光晶体比较后发现: 当三种晶体厚度都为0.1 mm时, DAST晶体可以获得12 THz带宽的发射频谱, 超过CdTe的3.5 THz和GaP的6.4 THz; 同时, 其最大发射强度超过CdTe和GaP的10倍以上. 因此, DAST晶体能够成为与掺镱飞秒激光匹配的高效THz发\linebreak 射源.Abstract: We investigate the feasibility to generate broadband THz efficiently from the DAST crystal excited by anYttrium-doped femtosecond pulse laser. Taking account of the phase matching condition and the impact of THz absorption, we simulated the THz emission spectra of DAST, CdTe as well as GaP crystals excited at 1.03 $\mu $m. Given a fixed thickness of 0.1 mm, the DAST achieves 12 THz bandwidth, much larger than CdTe (3.5 THz) and GaP (6.4 THz). Furthermore, the maximum emission amplitude of DAST exceed beyond 10 times of magnitude to CdTe or GaP crystals. Therefore, DAST crystal is proposed to be an efficient THz emitter adapt for Yttrium-doped femtosecond pulse lasers.
-
{[1]} JUKAM N, DHILLON S, ZHAO Z Y, et al. Gain measurements of THz quantum cascade lasers using THz time-domain spectroscopy [J]. IEEE Journal of Selected Topics In Quantum Electronics, 2008, 14(1): 436-442.{[2]} LUONG T Q, VERMA P K, MITRA R K, et al. Do hydration dynamics follow the structural perturbation during thermal denaturation of a protein: a terahertz absorption study [J]. Biophysical Journal, 2011, 101: 925-933.{[3]} RUTZ F, KOCH M, KHARE S, et al. Terahertz quality control of polymeric products [J]. International Journal of Infrared and Millimeter Waves, 2006, 27(4): 547-556.{[4]} CHANG G Q, DIVIN C J, YANG J, et al. GaP waveguide emitters for high power broadband THz generation pumped by Yb-doped fiber laser [J]. Optics Express, 2007, 15(25): 16308-16315.{[5]} SCHALL M, WALTHER M, JEPSEN P U. Fundamental and second-order phonon processes in CdTe and ZnTe [J]. Physical Review B, 2010, 64(9): 094301-094308.{[6]} YABUZAKI J, TAKAHASHI Y, ADACHI H, et al. High-quality crystal growth and characterization of organic nonlinear optical crystal: 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) [J]. Bulletin of Materials Science, 1999, 22(1): 11-13.{[7]} KATAYAMA I, AKAI R, BITO M, et al. Ultra-broadband terahertz generation using 4-N,N-dimethylamino-4-N-methyl-stilbazolium tosylate single crystals [J]. Applied Physics Letters, 2010, 97(1): 021105-021107.{[8]} SUIZU K, SHIBUYA T, UCHIDA H, et al. Prism-coupled Cherenkov phase-matched terahertz wave generation using a DAST crystal [J]. Optics Express, 2010, 18(4): 3338-3344.{[9]} CUNNINGHAM P, HAYDEN M. Optical properties of DAST in the THz range [J]. Optics Express, 2010, 18(23): 23620-23625.{[10]} KLENNER A, GOLLING M, KELLER U. A gigahertz multimode-diode-pumped Yb: KGW enable a strong frequency comb offset beat signal [J]. Optics Express, 2013, 21(8): 10351-10357.{[11]} PRADARUTTI B, MATTHAUS G, RIEHEMANN S, et al. Highly efficient terahertz electro-optic sampling by material [J]. Optics Communications, 2008, 281: 5031-5035.{[12]} JAZBINSEK M, MUTTER L, G\"{U}NTER P. Photonic applications with the organic nonlinear optical crystal DAST [J]. IEEE Journal of Selected Topics In Quantum Electronics, 2008, 14(5): 1298-1310.{[13]} SCHNEIDER A, NEIS M, STILLHART M, et al. Generation of terahertz pulse through optical rectification in organic DAST crystals: theory and experiment [J]. Journal of the Optical Society of America B, 2006, 23(9): 1822-1834.{[14]} PA\check{\rm C}BUTASV, BI\check{\rm C}I\bar{\rm U}AS A, BALAKAUSKAS S, et al. Terahertz time-domain-spectroscopy system based on femtosecond Yb:fiber laser and GaBiAs photoconducting components [J]. Applied Physics Letters, 2010, 93(3): 031111-031113.
点击查看大图
计量
- 文章访问数: 1317
- HTML全文浏览量: 59
- PDF下载量: 1794
- 被引次数: 0