Optical trapping and manipulation of fluorescent polymer-based nanostructures: Measuring optical properties of materials in the nanoscale range
Year: 2024
Type: article
Abstract: We present an alternative approach to determine the optical properties of materials in the nanoscale range using optical tweezers (OTs). Fluorescent polymer-based nanostructures (pdots) are optically trapped in a Gaussian-beam OT and the trap stiffness is studied as a function of various parameters of interest. We explicitly show that properties such as the refractive index and the optical anisotropy of these nanostructures can be determined with high accuracy by comparing the experimental data to an optical-force model. In particular, we demonstrate that the effective optical properties of these pdots can be modulated by changing the light wavelength that excites the sample, opening the door for a fine tuning of their optical response, with possible applications in the development of alternative sensors and/or other optoelectronic devices.
Source: Physical Review Applied
Authors: T.A. Moura, M.L. Lana Júnior, C.H.V. da Silva, L.R. Américo, J.B.S. Mendes, M.C.N.P. Brandão, A.G.S. Subtil, M.S. Rocha
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1426168670, G29316538
OpenAlex ID: W4405319102