Understanding thermal induced escape mechanism of optically levitated sphere in low vacuum

The escape phenomenon, mainly caused by thermal effects, is known as an obstacle to the further practical application of optical levitation system in vacuum. Irregular photophoresis induced effects can act amplifier Brownian motion. Studies on this topic provide interpretation for particle escaping phenomenon during pressure decreasing process, well valuable insights into micro- and nanoscale trap In paper, we derive test a dynamic model motion optically levitated non-equilibrium state demonstrate mechanism heated particles. result theoretical investigations consistent with experimental at 0.1mbar. This work reveals provides basis stable operation laser oscillator high vacuum pave way practicability ultra-sensitive sensing devices.