{"id":4043,"date":"2023-03-10T14:33:44","date_gmt":"2023-03-10T05:33:44","guid":{"rendered":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/?p=4043"},"modified":"2023-03-10T14:33:45","modified_gmt":"2023-03-10T05:33:45","slug":"detecting-the-molecular-vibration-information-faster-by-stretching-time","status":"publish","type":"post","link":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/news\/4043\/","title":{"rendered":"Detecting the molecular vibration information faster by \u201cstretching\u201d time"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"alignright size-large is-resized\"><a href=\"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2023\/03\/5db501bbbfaf224db26522b7dd2d0f43.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2023\/03\/5db501bbbfaf224db26522b7dd2d0f43-1024x507.png\" alt=\"\" class=\"wp-image-4044\" width=\"512\" height=\"254\" srcset=\"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2023\/03\/5db501bbbfaf224db26522b7dd2d0f43-1024x507.png 1024w, https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2023\/03\/5db501bbbfaf224db26522b7dd2d0f43-300x149.png 300w, https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2023\/03\/5db501bbbfaf224db26522b7dd2d0f43.png 1084w\" sizes=\"(max-width: 512px) 100vw, 512px\" \/><\/a><\/figure><\/div>\n\n\n\n<p>High-speed measurement confronts the extreme speed limit when the signal becomes comparable to the noise level. In the context of broadband mid-infrared spectroscopy, state-of-the-art ultrafast Fourier-transform infrared spectrometers, in particular dual-comb spectrometers, have improved the measurement rate up to a few MSpectra\u2009s<sup>\u22121<\/sup>, which is limited by the signal-to-noise ratio. Time-stretch infrared spectroscopy, an emerging ultrafast frequency-swept mid-infrared spectroscopy technique, has shown a record-high rate of 80\u2009MSpectra\u2009s<sup>\u22121<\/sup>\u00a0with an intrinsically higher signal-to-noise ratio than Fourier-transform spectroscopy by more than the square-root of the number of spectral elements. However, it can measure no more than ~30 spectral elements with a low resolution of several cm<sup>\u22121<\/sup>. Here, we significantly increase the measurable number of spectral elements to more than 1000 by incorporating a nonlinear upconversion process. The one-to-one mapping of a broadband spectrum from the mid-infrared to the near-infrared telecommunication region enables low-loss time-stretching with a single-mode optical fiber and low-noise signal detection with a high-bandwidth photoreceiver. We demonstrate high-resolution mid-infrared spectroscopy of gas-phase methane molecules with a high resolution of 0.017\u2009cm<sup>\u22121<\/sup>. This unprecedentedly high-speed vibrational spectroscopy technique would satisfy various unmet needs in experimental molecular science, e.g., measuring ultrafast dynamics of irreversible phenomena, statistically analyzing a large amount of heterogeneous spectral data, or taking broadband hyperspectral images at a high frame rate.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>See below for more information.<\/p>\n\n\n\n<ul><li>Aritcle URL :<a href=\"https:\/\/www.nature.com\/articles\/s41377-023-01096-4\">\u00a0https:\/\/www.nature.com\/articles\/s41377-023-01096-4<\/a><\/li><li>IdeguchiLab. :<a href=\"https:\/\/takuroideguchi.jimdo.com\/\"> https:\/\/takuroideguchi.jimdo.com\/<\/a><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"High-speed measurement confronts the extreme speed limit when the signal becomes comparable to the noise level [&hellip;]","protected":false},"author":7,"featured_media":4044,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"_links":{"self":[{"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/4043"}],"collection":[{"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/comments?post=4043"}],"version-history":[{"count":1,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/4043\/revisions"}],"predecessor-version":[{"id":4045,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/4043\/revisions\/4045"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media\/4044"}],"wp:attachment":[{"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media?parent=4043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/categories?post=4043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/tags?post=4043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}