His primary fields of study were about the free electron lasers and the theory of electron beam-plasma instabilities (Cherenkov instability) which is the base of plasma UHF electronics, he has extended his research interests to the nonlinear optics of laser-plasma interaction including phenomena such as self-focusing, terahertz generation, modulational and Raman instabilities, nonlinear modes, harmonics generation and solitons. Also, he has some theoretical studies about the nonlinear effects during interaction of laser with media including metallic nanoparticles which is a new exotic branch of Plasmonics. Additionally, he has started to study Cherenkov instability of electron bunches interacting with Parcell-Smith systems including a graphene layer which can lead to the terahertz radiation. The thesis topic of two master students of him is related to this problem. Recently, he has started some experimental investigations about atmospheric and low pressure discharges which include plasma antenna, nanoparticles synthesis by plasma discharge in liquids, influence of various discharges on hydrophobicity or hydrophilicity properties and plasma medicine as well. The results of his investigations during his career as a university professor are more than 30 qualified journal articles in different areas of plasma physics and plasmonics.