Xomalis, A;
Zheng, X;
Chikkaraddy, R;
Koczor-Benda, Z;
Miele, E;
Rosta, E;
Vandenbosch, GAE;
... Baumberg, JJ; + view all
(2021)
Detecting mid-infrared light by molecular frequency upconversion in dual-wavelength nanoantennas.
Science
, 374
(6572)
pp. 1268-1271.
10.1126/science.abk2593.
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Abstract
Coherent interconversion of signals between optical and mechanical domains is enabled by optomechanical interactions. Extreme light-matter coupling produced by confining light to nanoscale mode volumes can then access single mid-infrared (MIR) photon sensitivity. Here, we used the infrared absorption and Raman activity of molecular vibrations in plasmonic nanocavities to demonstrate frequency upconversion. We converted approximately 10-micrometer-wavelength incoming light to visible light by surface-enhanced Raman scattering (SERS) in doubly resonant antennas that enhanced upconversion by more than 1010. We showed 140% amplification of the SERS anti-Stokes emission when an MIR pump was tuned to a molecular vibrational frequency, obtaining lowest detectable powers of 1 to 10 microwatts per square micrometer at room temperature. These results have potential for low-cost and large-scale infrared detectors and spectroscopic techniques.
| Type: | Article |
|---|---|
| Title: | Detecting mid-infrared light by molecular frequency upconversion in dual-wavelength nanoantennas |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1126/science.abk2593 |
| Publisher version: | https://doi.org/10.1126/science.abk2593 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10139718 |
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