Detecting mid-infrared light by molecular frequency upconversion in dual-wavelength nanoantennas

Angelos Xomalis, Xuezhi Zheng, Rohit Chikkaraddy, Zsuzsanna Koczor-Benda, Ermanno Miele, Edina Rosta, Guy A.E. Vandenbosch, Alejandro Martínez, Jeremy J. Baumberg

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1268-1271
Number of pages4
JournalScience
Volume374
Issue number6572
DOIs
Publication statusPublished - 3 Dec 2021

Bibliographical note

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© 2021 American Association for the Advancement of Science. All rights reserved.

ASJC Scopus subject areas

  • General

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