His research included:
Dipole and strain glasses (à la
spin glass) and
magnetic and
electric impurities in 2D metals,
nonlinear-optics, where in the past he worked on
photorefractive and phase conjugate optics (imitates "time reversal"), formulated and solved the full basic photorefractive four-wave mixing nonlinear equations, invented the first passive (self-pumped)
phase-conjugate mirrors, the double phase conjugation, photorefractive self-trapping and photorefractive
spatial solitons. He demonstrated fixing information (images and gratings) in photorefractive crystals, the first transverse modes locking phenomenon and synthetic dimensions that can be lower or higher than 3 (hyper-combs) in mode-locked
lasers. He also worked on wave mixing in Bacterio-Rhodopsin,
fiber-optics and
fiber-optic communications, pulse optics, a new
tunable laser, and localization effects in fibers and lasers. Recently, he developed the approach of many-body photonics, showing a new view and use of
statistical-mechanics based study in optics and lasers. It included
phase-transitions and
critical phenomena in lasers and light, noise-mediated Casimir-like pulse interactions mechanism in lasers, new classical laser light condensation effects, and the first observation of thermalization and quantum-statistical-based
Bose-Einstein Condensation (BEC) of
photons in fibers. == Personal life ==