Terahertz Detection with Optically Gated Halide Perovskites

The main properties of halide perovskites useful for solar cells make them also attractive for terahertz (THz) applications. This class of materials, well studied in the optical range, remains much less studied in the THz range. Meanwhile, increasing the efficiency of pulsed terahertz sources and de...

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Bibliographic Details
Published in:ACS photonics 2022-05, Vol.9 (5), p.1663-1670
Main Authors: Obraztsov, Petr A., Chizhov, Pavel A., Gets, Dmitry S., Bukin, Vladimir V., Semenova, Olga I., Makarov, Sergey V.
Format: Article
Language:English
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Summary:The main properties of halide perovskites useful for solar cells make them also attractive for terahertz (THz) applications. This class of materials, well studied in the optical range, remains much less studied in the THz range. Meanwhile, increasing the efficiency of pulsed terahertz sources and detectors due to more advanced designs or new materials is one of the main directions in the field of terahertz technologies. Here, room-temperature detection of THz pulses propagating in free space with unbiased halide perovskites is demonstrated. The ultrafast change of conductivity that occurs in single crystals and polycrystalline films of lead methylammonium halides excited by a femtosecond laser enables efficient coherent detection of THz radiation. The results demonstrate the viability of solution-processable halide perovskite for the fabrication of photoconductive THz detectors and the further development of scalable and cost-effective sensor manufacturing for THz time-domain spectroscopy, imaging, and other photonic THz devices.
ISSN:2330-4022
2330-4022
DOI:10.1021/acsphotonics.2c00036