Measurement of infrared optical constants with visible photons
We demonstrate a new scheme for infrared spectroscopy with visible light sources and detectors. The technique relies on the nonlinear interference of correlated photons, produced via spontaneous parametric down conversion in a nonlinear crystal. Visible and infrared photons are split into two paths...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2018
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/84296 http://hdl.handle.net/10220/45089 |
| _version_ | 1824456729339887616 |
|---|---|
| author | Paterova, Anna Yang, Hongzhi An, Chengwu Kalashnikov, Dmitry Krivitsky, Leonid |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Paterova, Anna Yang, Hongzhi An, Chengwu Kalashnikov, Dmitry Krivitsky, Leonid |
| author_sort | Paterova, Anna |
| collection | NTU |
| description | We demonstrate a new scheme for infrared spectroscopy with visible light sources and detectors. The technique relies on the nonlinear interference of correlated photons, produced via spontaneous parametric down conversion in a nonlinear crystal. Visible and infrared photons are split into two paths and the infrared photons interact with the sample under study. The photons are reflected back to the crystal, resembling a conventional Michelson interferometer. Interference of the visible photons is observed and it is dependent on the phases of all three interacting photons: pump, visible and infrared. The transmission coefficient and the refractive index of the sample in the infrared range can be inferred from the interference pattern of visible photons. The method does not require the use of potentially expensive and inefficient infrared detectors and sources, it can be applied to a broad variety of samples, and it does not require a priori knowledge of sample properties in the visible range. |
| first_indexed | 2025-02-19T03:58:44Z |
| format | Journal Article |
| id | ntu-10356/84296 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:58:44Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/842962020-03-07T13:57:25Z Measurement of infrared optical constants with visible photons Paterova, Anna Yang, Hongzhi An, Chengwu Kalashnikov, Dmitry Krivitsky, Leonid School of Electrical and Electronic Engineering IR Spectroscopy Interferometry We demonstrate a new scheme for infrared spectroscopy with visible light sources and detectors. The technique relies on the nonlinear interference of correlated photons, produced via spontaneous parametric down conversion in a nonlinear crystal. Visible and infrared photons are split into two paths and the infrared photons interact with the sample under study. The photons are reflected back to the crystal, resembling a conventional Michelson interferometer. Interference of the visible photons is observed and it is dependent on the phases of all three interacting photons: pump, visible and infrared. The transmission coefficient and the refractive index of the sample in the infrared range can be inferred from the interference pattern of visible photons. The method does not require the use of potentially expensive and inefficient infrared detectors and sources, it can be applied to a broad variety of samples, and it does not require a priori knowledge of sample properties in the visible range. ASTAR (Agency for Sci., Tech. and Research, S’pore) Published version 2018-07-17T02:14:35Z 2019-12-06T15:42:18Z 2018-07-17T02:14:35Z 2019-12-06T15:42:18Z 2018 Journal Article Paterova, A., Yang, H., An, C., Kalashnikov, D., & Krivitsky, L. (2018). Measurement of infrared optical constants with visible photons. New Journal of Physics, 20(4), 043015-. 1367-2630 https://hdl.handle.net/10356/84296 http://hdl.handle.net/10220/45089 10.1088/1367-2630/aab5ce en New Journal of Physics © 2018 The Author(s). Published by IOP Publishing Ltd on behalf of Deutsche Physikalische Gesellschaft 10 p. application/pdf |
| spellingShingle | IR Spectroscopy Interferometry Paterova, Anna Yang, Hongzhi An, Chengwu Kalashnikov, Dmitry Krivitsky, Leonid Measurement of infrared optical constants with visible photons |
| title | Measurement of infrared optical constants with visible photons |
| title_full | Measurement of infrared optical constants with visible photons |
| title_fullStr | Measurement of infrared optical constants with visible photons |
| title_full_unstemmed | Measurement of infrared optical constants with visible photons |
| title_short | Measurement of infrared optical constants with visible photons |
| title_sort | measurement of infrared optical constants with visible photons |
| topic | IR Spectroscopy Interferometry |
| url | https://hdl.handle.net/10356/84296 http://hdl.handle.net/10220/45089 |
| work_keys_str_mv | AT paterovaanna measurementofinfraredopticalconstantswithvisiblephotons AT yanghongzhi measurementofinfraredopticalconstantswithvisiblephotons AT anchengwu measurementofinfraredopticalconstantswithvisiblephotons AT kalashnikovdmitry measurementofinfraredopticalconstantswithvisiblephotons AT krivitskyleonid measurementofinfraredopticalconstantswithvisiblephotons |