UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Near-field probing of strong light-matter coupling in single IR antennae

Mitrofanov, O; Wang, C-F; Habteyes, T; Luk, TS; Klem, J; Brener, I; Chen, H-T; (2020) Near-field probing of strong light-matter coupling in single IR antennae. In: Razeghi, M and Baranov, AN, (eds.) Terahertz Emitters, Receivers, and Applications XI. SPIE: California, USA. Green open access

[img]
Preview
Text
Mitrofanov_114990A.pdf - Published version

Download (1MB) | Preview

Abstract

Quantum well intersubband polaritons are traditionally studied in large scale systems, over many wavelengths in size. In this presentation, we demonstrate that it is possible to detect and investigate intersubband polaritons in a single subwavelength nanoantenna in the IR frequency range. We observe polariton formation using a scattering-type near-field microscope and nano-FTIR spectroscopy. We will discuss near-field spectroscopic signatures of plasmonic antennae with and without coupling to the intersubband transition in quantum wells located underneath the antenna. Evanescent field amplitude spectra recorded on the antenna surface show a mode anti-crossing behavior in the strong coupling case. We also observe a corresponding strong-coupling signature in the phase of the detected field. We anticipate that this near-field approach will enable explorations of strong and ultrastrong light-matter coupling in the single nanoantenna regime, including investigations of the elusive effect of ISB polariton condensation.

Type: Proceedings paper
Title: Near-field probing of strong light-matter coupling in single IR antennae
Event: SPIE Optical Engineering + Applications, 2020
Location: California, USA
Dates: 24 August 2020 - 04 September 2020
Open access status: An open access version is available from UCL Discovery
DOI: 10.1117/12.2568033
Publisher version: https://doi.org/10.1117/12.2568033
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10108926
Downloads since deposit
31Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item