講演情報
[15a-K305-6]Optical Sorting and Spectroscopy of Micro and Nanospheres Containing Carbonyl Bonds with Mid-Infrared Optical Force
〇(P)Yoshua Albert Darmawan1, Taiki Yanagishima2, Takao Fuji1, Tetsuhiro Kudo1 (1.Toyota Tech. Inst., 2.Kyoto Univ.)
キーワード：
infrared spectroscopy、optical manipulation、optical tweezer
Recently, it was demonstrated that the resonant enhancement of optical force in the mid-infrared (mid-IR) targeting siloxane bond-containing microspheres at 9.3 μm can be used to precisely sort microparticles based on their absorbance value in the mid-IR. In this work, we expand the capability of this method to reconstruct the Mid-IR spectra of microspheres from their resonantly enhanced velocity. By utilizing a tunable mid-IR laser, we investigated the velocity profiles of different microspheres at various wavenumbers. Our results show that these velocity profiles correlate well with ATR-FTIR spectra, highlighting the potential of this approach to identify and sort particles based on their molecular vibrational signatures. This technique offers a novel way to perform single-particle mid-IR spectroscopy, with potential applications in the analysis of micro- and nanoparticles in various fields, including material science and diagnostics.