title: Acousto-optic tunable second harmonic generation in periodically poled LiNbO3.
abstract: Acousto-optic (AO) tunable second harmonic generation (SHG) was proposed in periodically poled lithium niobate (PPLN). The acoustic wave could either be induced from an external transducer or self-generated in PPLN driving with a cross-field radio frequency field. The reciprocal vector of PPLN compensates the SHG wave-vector mismatch when quasi-phase- matching (QPM) condition is satisfied, while phonons with suitable frequencies may affect it by scattering photons to different polarization state. The QPM SHG and AO polarization rotation are coupled together. Second harmonic waves' intensities, polarization states and even phases thus could be manipulated instantly through AO interaction.
authors: Department of Materials Science and Engineering and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, PR China
authors: Zi-yan
authors: ZY
authors: Yu
authors: Fei
authors: F
authors: Xu
authors: Fei
authors: F
authors: Leng
authors: Xiao-Shi
authors: XS
authors: Qian
authors: Xiang-fei
authors: XF
authors: Chen
authors: Yan-qing
authors: YQ
authors: Lu
mesh_terms: D000162:Acoustics; D003460:Crystallization; D004867:Equipment Design; D009556:Niobium / Q000737:chemistry*; D055096:Optical Devices; D055095:Optics and Photonics; D010087:Oxides / Q000737:chemistry*; D017785:Photons
chemical_list: D010087:Oxides; D009556:Niobium; C091692:lithium niobate