AUTHOR=Otani Sandro K. , Martins Thalyta T. , Muniz Sérgio R. , de Sousa Filho Paulo C. , Sigoli Fernando A. , Nome René A. 

TITLE=Spectroscopic characterization of rare events in colloidal particle stochastic thermodynamics

JOURNAL=Frontiers in Chemistry

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2022.879524

DOI=10.3389/fchem.2022.879524

ISSN=2296-2646

ABSTRACT=<p>Given the remarkable developments in synthetic control over chemical and physical properties of colloidal particles, it is interesting to see how stochastic thermodynamics studies may be performed with new, surrogate, or hybrid model systems. In the present work, we apply stochastic dynamics and nonlinear optical light-matter interaction simulations to study nonequilibrium trajectories of individual Yb (III):Er (III) colloidal particles driven by two-dimensional dynamic optical traps. In addition, we characterize the role of fluctuations at the single-particle level by analyzing position trajectories and time-dependent upconversion emission intensities. By integrating these two complementary perspectives, we show how the methods developed here can be used to characterize rare events.</p>