Issue 1, 2023

Uniaxial strain tuning of organic molecule single photon sources

Abstract

Organic fluorophores are excellent single photon sources, combining high brightness, lifetime-limited linewidths and useful emission wavelengths. A key factor in their performance as photon emitters is their dynamic frequency tunability, which can be used to render the emission from multiple molecules indistinguishable. In this work we demonstrate dynamic tuning of dibenzoterrylene molecules embedded in anthracene crystals through the application of uniaxial strain fields. By bending a piezoelectric strip in two opposite directions in linear steps, we impose an escalating compressive or tensile strain on the molecular crystals, resulting in two opposite dynamic detunings of the dopant dibenzoterrylene emission wavelength. To validate that the tuning mechanism is strain, we performed a similar measurement using an identical strip that was depolarised by annealing in which the tuning was absent. Finally, we simulated the effect of strain on the dopant dibenzoterrylene emission wavelength by combining molecular dynamics and density functional theory techniques to determine the strain tuning rate which matched well with that found experimentally.

Graphical abstract: Uniaxial strain tuning of organic molecule single photon sources

Article information

Article type
Paper
Submitted
04 5月 2022
Accepted
14 11月 2022
First published
15 11月 2022
This article is Open Access
Creative Commons BY license

Nanoscale, 2023,15, 177-184

Uniaxial strain tuning of organic molecule single photon sources

A. Fasoulakis, K. D. Major, R. A. Hoggarth, P. Burdekin, D. P. Bogusz, R. C. Schofield and A. S. Clark, Nanoscale, 2023, 15, 177 DOI: 10.1039/D2NR02439J

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