2025/04/20 by Samanta, Rabisankar, Savo, Romolo, Conti, Claudio +1 · 1 citation
#Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Optics (physics.optics)
paper · doi:10.48550/arxiv.2504.14589
The field of complex photonics has garnered significant interest due to its rich physics and myriad applications spanning physics, engineering, biology, and medicine. However, a substantial portion of research focuses primarily on the linear medium. Over the years, optical nonlinearity, particularly the second order denoted as χ(2), has been harnessed for diverse applications such as frequency conversions, three-wave mixing, material characterizations, and bio-imaging. When χ(2)-nonlinearity combines with the disorder, a new realm of physics emerges, which in the last 30 years has witnessed substantial progress in fundamental studies and futuristic applications. This review aims to explore fundamental concepts concerning χ(2)-nonlinear disordered media, chart the field's evolution, highlight current interests within the research community, and conclude with a future perspective.