On the 45th Anniversary of the Samara Branch of the Lebedev Physical Institute of the Russian Academy of Sciences

Optothermal manipulation in a cooled cuvette

S. P. Kotova, N. N. Losevskii, A. M. Maiorova, S. A. Samagin

Samara Branch of P. N. Lebedev Physical Institute, Russian Academy of Sciences

Abstract: Experiments and numerical simulation demonstrate the feasibility of forming convective currents to capture and transfer 2.9 μm polystyrene microspheres in a cuvette cooled down to 5°C. The velocity of the currents is shown to depend on the gradient of temperature regardless of its initial level. Furthermore, the temperature in the manipulation region can drop to between 25 and 35°C. These results were obtained for point and ring optothermal traps.

Keywords: convective currents, optothermal trap, temperature gradient, optothermal manipulation, cooling temperature.

Received: 20.05.2025
Revised: 02.07.2025
Accepted: 04.07.2025

 English version: Quantum Electronics, 2025, 52:suppl. 6, S622–S629