The Temperature of an Optically Trapped, Rotating Microparticle

Paloma Rodríguez-Sevilla, Yoshihiko Arita, Xiaogang Liu, Daniel Jaque, Kishan Dholakia

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The measurement of temperature at the mesoscopic scale is challenging but important in a wide variety of research fields, including the investigation of single-molecule and cell mechanics and interactions as well as fundamental studies in heat transfer and Brownian dynamics on this scale. In this article we present a route that determines temperature at the nano- to microscale with three independent measurements performed on a single trapped, rotating luminescent microparticle. We measure temperature changes using both the internal and external degrees of freedom, via (i) the upconverted luminescence, (ii) the rotation rate, and (iii) the Brownian dynamics of the particle. This novel tripartite approach allows us to cross-correlate the temperature for both the internal and external (center-of-mass) degree of freedom for the particle. In addition, our approach provides a measure of the temperature increase without the need of a precise knowledge of the particle dimensions, shape, or any previous calibration of the sample or the experimental setup. The developed technique opens up prospects for stringent tests of nanothermometry.

Original languageEnglish
Pages (from-to)3772-3778
Number of pages7
JournalACS Photonics
Volume5
Issue number9
DOIs
Publication statusPublished - 2018 Sep 19

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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