Nanoscale optical thermometry using a time-correlated single-photon counting in an illumination-collection mode

Daichi Seto, Ren Nikka, Shogo Nishio, Yoshihiro Taguchi, Toshiharu Saiki, Yuji Nagasaka

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A nanoscale thermometry method called fluorescence near-field optics thermal nanoscopy (Fluor-NOTN) has been developed using near-field fluorescence imaging. This method can detect local temperature distributions with a nanoscale spatial resolution by measuring the fluorescence lifetimes of Cd/Se quantum dots (QDs) as a temperature probe. To increase the sensitivity of Fluor-NOTN, time-correlated single-photon counting (TCSPC) was introduced with a triple-tapered fusion-spliced near-field (TFN) optical fiber probe. This highly sensitive technique for measuring the fluorescence lifetime of QDs enabled the detection of low-level light signals with a picosecond time resolution at high-precision in an illumination-collection mode for Fluor-NOTN. The feasibility of this proposed method was experimentally verified by measuring the temperature dependence of the fluorescence lifetimes of the QDs by Fluor-NOTN using TCSPC with a TFN optical fiber probe with an aperture of 70 nm.

Original languageEnglish
Article number033109
JournalApplied Physics Letters
Volume110
Issue number3
DOIs
Publication statusPublished - 2017 Jan 16

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temperature measurement
counting
illumination
near fields
fluorescence
photons
optics
quantum dots
life (durability)
fusion
optical fibers
temperature probes
probes
temperature distribution
spatial resolution
apertures
temperature dependence
sensitivity

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Nanoscale optical thermometry using a time-correlated single-photon counting in an illumination-collection mode. / Seto, Daichi; Nikka, Ren; Nishio, Shogo; Taguchi, Yoshihiro; Saiki, Toshiharu; Nagasaka, Yuji.

In: Applied Physics Letters, Vol. 110, No. 3, 033109, 16.01.2017.

Research output: Contribution to journalArticle

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