[22p-C302-1~17] 3.7 Optical measurement, instrumentation, and sensor (formerly 3.8)

△ [22p-C302-2] Characterization of coherently controlled circular polarization switching with dual-comb spectroscopy

〇(M2)Ruichen Zhu¹, Ryota Nagasaki¹, Takashi Kato^1,2, Haochen Tian^1,3, Akifumi Asahara¹, Kaoru Minoshima¹ (1.Univ. of Electro-Communications, 2.PRESTO, JST, 3.JSPS International Research Fellow)

Keywords:Optical frequency comb, Dual-comb spectroscopy, Circular dichroism spectroscopy

We characterized circular polarization switching based on polarization-modulated dual-comb technique utilizing high phase controllability of optical frequency combs. We evaluated the difference between the amplitude and phase spectra of the dual-comb interference signals corresponding to the switched left and right circularly polarized light. The balanced and precise circular polarization switching is demonstrated. This developed technique is expected to be applied to advanced spectroscopic instruments for characterizations of circular dichroism in the future.