Year: 2025
Type: article
Abstract: This work theoretically and numerically explores the effects of varying the excitation beam radius along the propagation axis on time-dependent thermal lensing phenomena. We investigate how changes in sample length and geometrical parameters of the setup influence the thermal lens signal. Specifically, for samples obeying the Beer–Lambert law of optical absorption, an exponential relation between sample length and excitation beam waist is found to accurately describe the point of maximum magnitude of the steady-state signal, offering a reliable route for signal optimization. Understanding the photothermal effects under tightly focused beam excitation is essential to enhance overall sample characterization, being particularly relevant to modern applications in thermal lens microscopy.
Source: Journal of Applied Physics
DOI: 10.1063/5.0294511
Language: English
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,500
Funders: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação Araucária, Financiadora de Estudos e Projetos, Bundesministerium für Digitalisierung und Wirtschaftsstandort, Korea Evaluation Institute of Industrial Technology
Awards: G1011009802, G3084300006
OpenAlex ID: W4414424546