Title :
Thermal diffusion simulations for photothermal oscillators
Author :
Kawakami, Kotomi ; Okamura, Hideki ; Mitani, Atsushi
Author_Institution :
Dept. of Phys., Int. Christian Univ., Mitaka, Japan
Abstract :
The effect of material parameters on the oscillation amplitude of a photothermal actuator/oscillator was discussed, and a criterion to maximize the amplitude was derived. The bending stress is inversely proportional to the thickness of the irradiated portion, while a certain thickness is necessary for a temperature gradient to be created. Numerical simulations suggested the bending effect becomes largest when the thickness is about the thermal diffusion length of the substance. Experiment using Cu samples with thickness ranging from 0.05 to 0.5mm confirmed the theoretical predictions.
Keywords :
actuators; copper; laser beam applications; oscillations; photothermal effects; thermal diffusivity; Cu; bending stress; numerical simulations; oscillation amplitude; photothermal actuator; photothermal oscillators; size 0.05 mm to 0.5 mm; thermal diffusion length; Frequency measurement; Heating; Neck; Oscillators; Radiation effects; Resonant frequency; Stress; Light-driven actuator; Photothermal effect; photothermal oscillator; temperature gradient; thermal diffusivity;
Conference_Titel :
Optomechatronic Technologies (ISOT), 2010 International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-7684-8
DOI :
10.1109/ISOT.2010.5687335
