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Proceedings Paper

Optical thermal management and real‐time molecular sensing with hybrid nanocavity (Conference Presentation)
Author(s): Dmitry Zuev; Valentin Milichko; Denis Baranov; George Zograf; Katerina Volodina; Andrey Krasilin; Ivan Mukhin; Pavel Dmitriev; Vladimir Vinogradov; Sergey Makarov; Pavel Belov
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Paper Abstract

We demonstrate that a hybrid c-Si/Au nanocavity can serve as a multifunctional sensing platform for nanoscale (about 100 nm) thermometry with high accuracy (>0.4 K) and fast response (<0.1 second), controlled local optical heating up to 1200 K and also provide Raman scattering enhancement (>10^4 fold). The system has been tested in the experiment on thermally induced unfolding of BSA molecules, plased inside the hybrid nanocavity. Moreover, numerical modeling reveal, that two possible operation modes of the system: with and without considerable optical heating at the nanometer scale, while other functionalities (nanothermometry, RS enhancement, and tracing the events) are preserved. These regimes make the hybrid nanocavity more versatile sensing system than fully plasmonic counterparts. The simplicity and multifunctionality of the hybrid nanocavity make it a promising platform for photochemistry and photophysics applications.

Paper Details

Date Published: 17 September 2018
Proc. SPIE 10721, Active Photonic Platforms X, 107210E (17 September 2018); doi: 10.1117/12.2321281
Show Author Affiliations
Dmitry Zuev, ITMO Univ. (Russian Federation)
Valentin Milichko, ITMO Univ. (Russian Federation)
Denis Baranov, Moscow Institute of Physics and Technology (Russian Federation)
Chalmers Univ. of Technology (Sweden)
George Zograf, ITMO Univ. (Russian Federation)
Katerina Volodina, ITMO Univ. (Russian Federation)
Andrey Krasilin, ITMO Univ. (Russian Federation)
Ioffe Institute (Russian Federation)
Ivan Mukhin, ITMO Univ. (Russian Federation)
St. Petersburg Academic Univ. (Russian Federation)
Pavel Dmitriev, ITMO Univ. (Russian Federation)
Vladimir Vinogradov, ITMO Univ. (Russian Federation)
Sergey Makarov, ITMO Univ. (Russian Federation)
Pavel Belov, ITMO Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 10721:
Active Photonic Platforms X
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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