Abstract
We have experimentally determined the terahertz- (THz-) wave parametric gain of stimulated Raman scattering (SRS) by phonon-polaritons in LiNbO3. Our approach is based on ultrabright THz-wave generation from SRS under stimulated Brillouin scattering suppression with subnanosecond pump pulses. To obtain the frequency dependence of the parametric gain, we measured the crystal-length dependence of the THz-wave output directly using a surface-coupling configuration. We found that the product of the parametric gain and the threshold crystal length is constant throughout the tuning range. Our result provides a physical basis for the design and performance enhancement of SRS-based ultrabright tabletop THz-wave sources for various applications.
Original language | English |
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Article number | 043836 |
Journal | Physical Review A |
Volume | 93 |
Issue | 4 |
ISSN | 2469-9926 |
DOIs | |
Publication status | Published - 21 Apr 2016 |
Externally published | Yes |