Twisted double-pulse generation via Michelson interferometer

Hao-Keng Wei^1*, Leona Isogai², Hironori Ito², Kazuhiko Misawa², Chih-Wei Luo¹

¹Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan
²Department of Applied Physics, Tokyo University of Agriculture and Technology, Tokyo, Japan

* Presenter:Hao-Keng Wei, email:star0972595663.ep01@g2.nctu.edu.tw

In this study, the twisted double-pulse generation has been achieved via the Michelson interferometer (MI). This novel twisted double-pulse generation system gives us the ability to control the frequency of the helicity regardless the original light frequency. For example, one can generate a circular polarized light, whose polarization is varying with a low frequency of THz, while its photon energy is in the near-infrared (NIR) region. In a typical field control system, a spatial light modulator (SLM) was introduced, which limited the maximum power. We realized the generation of a double-pulse train by inserting a pellicle beamsplitter in each of the arms of MI. This design provides more degrees of freedom to manipulate the double-pulse train, which is crucial for studying the surface states in topological insulators.

Keywords: Michelson interferometer, twisted double-pulse, polarization