2012/02/10 by Ksawery Kalinowski, Vito Roppo, Kalinowski, Ksawery +11
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Optical and Acousto-Optic Technologies #Optics (physics.optics) #Photorefractive and Nonlinear Optics #Solid-state spectroscopy and crystallography #physics.optics
paper · pdf · doi:10.48550/arxiv.1202.2349
submitted for publication
openalex publication_date 2012/02/10 · arxiv created 2012/06/15 · arxiv updated 2012/06/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the parametric wave interaction in qua- dratic nonlinear media with randomized distribution of the ferroelectric domains. In particular, we discuss properties of second and cascaded third harmonic generation. We derive analytical formulas describing emission properties of the second and third harmonics in the presence of domain disorder and show that the latter process is governed by the characteristics of the constituent processes, i.e. second harmonic generation and sum frequency mixing. We demonstrate the role of randomness on various second and third harmonic generation regimes such as Raman-Nath and Čerenkov nonlinear diffraction. We show that the randomness-induced incoherence in the wave interaction leads to deterioration of conversion efficiency and angular spreading of harmonic generated in the processes relying on transverse phase matching such as Raman-Nath. On the other hand forward and Čerenkov frequency generation are basically insensitive to the domain randomness.