Thermoelastic damping in optical waveguide resonators with the bolometric effect.

Area of Science:

• Physics
• Materials Science
• Nanotechnology

Background:

• Thermoelastic damping is a critical factor in the performance of micro- and nanoresonators.
• Optical gradient forces can drive nanowaveguide resonators, influencing their dynamic behavior.
• Understanding energy dissipation mechanisms is crucial for designing efficient optomechanical devices.

Purpose of the Study:

• To investigate the thermoelastic damping in nanowaveguide resonators driven by optical gradient force.
• To develop a theoretical model incorporating the bolometric effect and complex optical power distribution.
• To analyze the influence of various parameters on thermoelastic damping.

Main Methods:

• Euler-Bernoulli beam theory for deriving the governing equation.
• Solving the heat diffusion equation to model thermoelastic damping.
• Investigating the effects of injected optical power, temperature, material, and geometry.

Main Results:

• Thermoelastic damping increases with injected optical power at low ranges.
• Material properties have minimal effect on intrinsic energy dissipation at high optical power.
• Damping behavior varies significantly with environmental and representative temperatures.
• Thermoelastic damping exhibits scale dependence, especially concerning optical power.

Conclusions:

• The bolometric effect significantly impacts thermoelastic damping in optically driven nanowaveguide resonators.
• Injected optical power and temperature are key parameters controlling thermoelastic damping.
• The developed model provides insights into energy dissipation for nanophotonic device optimization.