Temperature-Controlled Entangled-Photon Absorption Spectroscopy
| Autor: | Jiří Svozilík, Juan P. Torres, Roberto de J. León-Montiel, Alfred B. U'Ren |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. FOTONICA - Grup de Recerca de Fotònica |
| Rok vydání: | 2019 |
| Předmět: |
Work (thermodynamics)
Photon Absorption spectroscopy Fotònica FOS: Physical sciences Physics::Optics General Physics and Astronomy 01 natural sciences Signal Gravitational waves symbols.namesake Photon entanglement 0103 physical sciences Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica [Àrees temàtiques de la UPC] 010306 general physics Physics Quantum Physics Space vehicles Computational physics Nonlinear system Photonics Fourier transform symbols A priori and a posteriori Quantum Physics (quant-ph) Instruments Physics - Optics Optics (physics.optics) |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.123.023601 |
| Popis: | Entangled two-photon absorption spectroscopy (TPA) has been widely recognized as a powerful tool for revealing relevant information about the structure of complex molecular systems. However, to date, the experimental implementation of this technique has remained elusive, mainly because of two major difficulties. First, the need to perform multiple experiments with two-photon states bearing different temporal correlations, which translates in the necessity to have at the experimenter's disposal tens, if not hundreds, of sources of entangled photons. Second, the need to have \emph{a priori} knowledge of the absorbing medium's lowest-lying intermediate energy level. In this work, we put forward a simple experimental scheme that successfully overcomes these two limitations. By making use of a temperature-controlled entangled-photon source, which allows the tuning of the central frequencies of the absorbed photons, we show that the TPA signal, measured as a function of the temperature of the nonlinear crystal that generates the paired photons, and a controllable delay between them, carries all information about the electronic level structure of the absorbing medium, which can be revealed by a simple Fourier transformation. Comment: 8 pages, 3 figures |
| Databáze: | OpenAIRE |
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