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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.6
- 수록면
- 297 - 302 (6page)
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Terahertz (THz) wave generation from bulk and periodically poled LiTaO<sub>3</sub> (PPLT) with a Cherenkovphase matching scheme is numerically investigated. It is shown that by using the crystal birefringenceof bulk LiTaO<sub>3</sub> and a grating vector of PPLT, THz waves can be efficiently generated by differencefrequency generation (DFG) with a Cherenkov phase matching scheme. The frequency tuning characteristicsof the THz wave via varying wavelength of difference frequency waves, phase matching angle, polingperiod of PPLT and working temperature are theoretically analyzed. The parametric gain coefficient inthe low-loss limit and the absorption coefficient of the THz wave during the DFG process in the vicinityof polariton resonances are numerically analyzed. A THz wave can be efficiently generated by utilizingthe giant second order nonlinearities of LiTaO<sub>3</sub> in the vicinity of polariton resonances
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