Novel concept for contactless all-optical temperature measurement based on diffusion-inspired phosphorescent decay in nanostructured environment

Denis Kislov*, Denis Novitsky, Alexey Kadochkin, Alexander S. Shalin, Pavel Ginzburg

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Structured environment controls dynamics of light-matter interaction processes via modified local density of electromagnetic states. In typical scenarios, where nanosecond-scale fluorescent processes are involved, mechanical conformational changes of the environment during the interaction processes can be safely neglected. However, slow decaying phosphorescent complexes (e.g. lanthanides) can efficiently probe micro- and millisecond scale motion via near-field interactions with nearby structures. As the result, lifetime statistics can inherit information about nano-scale mechanical motion. Here we study light-matter interaction dynamics of phosphorescent dyes, diffusing in a proximity of a plasmonic nanoantenna. The interplay between time-varying Purcell enhancement and stochastic motion of molecules is considered via a modified diffusion equation, and collective decay phenomena is analyzed. Fluid properties, such as local temperature and diffusivity, are mapped on phosphorescent lifetime distribution and then extracted with the help of inverse Laplace transformation. The presented photonic platform enables performing contactless all-optical thermometry and diffusion measurements, paving a way for a range of possible applications. In particular, detailed studies of nanofluidic processes in lab-on-a-chip devices, challenging for analysis with other optical methods, can be performed with time-dependent phosphorescence.

Original languageEnglish
Title of host publication5th International Conference on Metamaterials and Nanophotonics, METANANO 2020
EditorsPavel Belov, Mihail Petrov
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735440340
DOIs
StatePublished - 8 Dec 2020
Event5th International Conference on Metamaterials and Nanophotonics, METANANO 2020 - St. Petersburg, Virtual, Russian Federation
Duration: 14 Sep 202018 Sep 2020

Publication series

NameAIP Conference Proceedings
Volume2300
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference5th International Conference on Metamaterials and Nanophotonics, METANANO 2020
Country/TerritoryRussian Federation
CitySt. Petersburg, Virtual
Period14/09/2018/09/20

Funding

FundersFunder number
European Research Council
Russian Science Foundation20-72-10141
PAZY Foundation

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