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.
References
Ferguson, B. & Zhang, X.-C. Materials for terahertz science and technology. Nat. Mater. 1, 26–33 (2002). A review article that presents THz spectroscopy and its applications.
Wood, V. et al. Electroluminescence from nanoscale materials via field-driven ionization. Nano Lett. 11, 2927–2932 (2011). This paper reports electric field-driven inter-QD charge transfer and electroluminescence.
Pein, B. C. et al. Terahertz-driven luminescence and colossal stark effect in CdSe–CdS colloidal quantum dots. Nano Lett. 17, 5375–5380 (2017). This paper reports THz field-driven QD electroluminescence.
Yoo, D. et al. Ultrastrong plasmon–phonon coupling via epsilon-near-zero nanocavities. Nat. Photon. 15, 125–130 (2021). This paper reports strong coupling between light and molecules observed in resonant coaxial nanocavities.
Tyo, J. S., Goldstein, D. L., Chenault, D. B. & Shaw, J. A. Review of passive imaging polarimetry for remote sensing applications. Appl. Opt. 45, 5453–5469 (2006). A review article that presents visible imaging polarimetry with division of focal plane.
Additional information
Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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).
Rights and permissions
About this article
Cite this article
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
Published:
Issue Date:
DOI: https://doi.org/10.1038/s41565-022-01251-9
- Springer Nature Limited