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We have observed enhancements of forward and backward anti-Stokes Raman signals generated in lithium niobate waveguides by one order of magnitude. Forward and backward exhibit different spectral features, unique for two configurations.
We investigated hot phonons based on Stokes Raman scattering from a GaN/AlN high electron mobility transistor. Such a simple method is advantageous compared with the method based on Stokes and anti-Stokes Raman scattering.
We have investigated photoluminescence (PL) and terahertz (THz) generation simultaneously from multiple InGaN/GaN quantum wells (QWs) with different well periods. The PL intensity fully saturates when the period of QWs is increased up to 4. However, THz output power continuously scales up even if the period of QWs is increased up to 16. Such a behavior indicates that high-power THz wave can be generated...
Efficient terahertz pulses are emitted from stacked GaP plates used as an output coupler for a Q-switched solid-state laser. Such a novel intracavity configuration is exploited to achieve an enhancement of two orders of magnitude.
By coupling two counter-propagating fundamental beams into a LiNbO3 channel waveguide, we have generated a strong surface-emitting second-harmonic beam, with normalized conversion efficiency being enhanced by seven orders of magnitude.
After reducing timing jitter between each pair of dual-frequency pulses generated by a passively Q-switched laser by 20 times, we have successfully generated THz pulses based on frequency mixing.
Based on a novel configuration of a dual-frequency laser system constructed from a Nd:YLF crystal, we have synchronized Q-switched laser pulses at 1047 nm and 1053 nm.
We demonstrate that THz radiation beams generated by an array of the randomly-distributed InN nanopyramids can be used to enhance the THz output power by two orders of magnitude due to strong constructive interference.
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