Structured light and its applications

Ting-Hua Lu^1*

¹Department of Physics, National Taiwan Normal University, Taipei, Taiwan

* Presenter:Ting-Hua Lu, email:thlu@ntnu.edu.tw

This talk includes the introduction of the structure light, especially focus on the twisted light which possesses helical wavefront and orbital angular momentum. The twisted light, so-called Laguerre-Gaussian beam, can be easily produced by conversion of Hermite-Gaussian mode directly from laser cavities. However, there are various techniques for generating the structural or twisted light by Gaussian beam, such as liquid crystal spatial light modulator, spiral phase plates, and liquid crystal based q-plates. The twisted light has unique optical properties due to the existence of an extra degree of freedom as compared to that of the polarized beam. It opens a new window of physics while structured light interacts with matters, such as two-dimensional semiconductor materials. Another topic in this talk will be the structured light-matter interaction. Currently, we focus on studying the structural light-matter interaction of transition metal dichalcogenide materials including photoluminescence and Raman spectroscopy.

Keywords: laser, optical angular momentum, 2D materials, photoluminescence, Raman scattering