Single-Photon Infrared Imaging With a Silicon Camera Based on Long-Wavelength-Pumping Two-Photon Absorption
| Autor: | Jianan Fang, Heping Zeng, Ming Yan, Eliza Wu, Kun Huang, Yinqi Wang |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 28:1-7 |
| ISSN: | 1558-4542 1077-260X |
| DOI: | 10.1109/jstqe.2021.3099874 |
| Popis: | We experimentally demonstrated an ultra-sensitive imaging system for telecom photons based on the non-degenerate two-photon absorption in a silicon-based electron multiplying charge-coupled device (EMCCD). The proposed long-wavelength-pumping scheme with mid-infrared pulsed excitation could not only effectively increase the two-photon absorption coefficient, but also significantly suppress the background noise caused by the harmonic absorption of the strong pumping field. In comparison to the photoelectric response via the degenerate two-photon absorption, the implemented configuration could offer over 30-folded enhancement of the photon-counting rate in the infrared imaging. The resulting detection sensitivity up to 1 photon/pixel/pulse was unprecedentedly approached, thus facilitating the single-photon operation. The elimination of the stringent phase matching as typically required in the optical parametric conversion has led to a high spatial resolution of 13 $\mu$ m. Moreover, the on-chip nonlinearity of the optical imager would enable a broadband spectral window and an enlarged field of view. In combination with the 5-ps temporal resolution due to the coincident optical gating, the presented imaging system would find various promising applications, such as low-light fluorescence lifetime microscopy and photon counting time-of-flight 3D imaging. |
| Databáze: | OpenAIRE |
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