Quantum dots can convert terahertz photons into visible light. This mechanism is used to develop a semiconductor-based room-temperature terahertz camera that can simultaneously record the field strength and polarization states of a terahertz beam. The proposed detector has fast speeds and can be manufactured at the wafer-scale.
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This is a summary of: Shi, J. et al. A room-temperature polarization-sensitive CMOS terahertz camera based on quantum-dot-enhanced terahertz-to-visible photon upconversion. Nat. Nanotechnol. https://doi.org/10.1038/s41565-022-01243-9 (2022).
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Using quantum dots to produce a CMOS terahertz camera and polarimeter. Nat. Nanotechnol. 17, 1247–1248 (2022). https://doi.org/10.1038/s41565-022-01251-9
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DOI: https://doi.org/10.1038/s41565-022-01251-9