Twisted double-pulse generation via Michelson interferometer
Hao-Keng Wei1*, 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,
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