Laser driving has the advantages of non-contact

adjustability and controllability

and has a wide range of application prospects.A thermoelastic coupling model for laser excitation is constructed.A method to improve energy efficiency for photothermal nonlinear vibrations is proposed

and a high-frequency pulse cycle sequence is designed for laser excitation.This achieves a large excitation of photoinduced vibrations in the presence of nonlinear mode interactions

increasing the cantilever beam volume-to-power ratio by a factor of several thousand and expanding the amplitude to the millimeter scale.The morphology and reflectivity of the reduced-reflection microstructure are studied under different laser processing spacings

and the effect of the structure on the response amplitude is investigated.It is demonstrated that the utilization of the reduced-reflection microstructures to reduce the material reflectivity can improve the photothermal conversion efficiency

so as to enhance the nonlinear low-frequency response and effectively increase the amplitude of the metal photo-induced vibrational beam in thickness direction(by a factor of 7 to 30).The application scope of photo-induced vibration in the fields of semiconductors

pharmaceuticals

and precision machining is broadened.