Photo-induced forces on AFM cantilever by externally modulated laser

Shahrul Kadri; Hideki Fujiwara; Keiji Sasaki

doi:10.1117/12.839932

23 November 2009 Photo-induced forces on AFM cantilever by externally modulated laser

Shahrul Kadri, Hideki Fujiwara, Keiji Sasaki

Proceedings Volume 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications; 75081S (2009) https://doi.org/10.1117/12.839932
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

Abstract

The focus of this study is to demonstrate and investigate the influence of photo-induced forces on the dynamics of the AFM cantilever under externally amplitude modulated laser in an ambient condition. The excitation laser at 780 nm is modulated at 20 Hz to 60 kHz and focused on the AFM cantilever surface. The cantilever vibration is monitored by HeNe probe laser. We observed highly excited vibration of the cantilever at several kHz modulation frequencies regime and at around its mechanical resonance which correspond to photo-induced forces. In addition, we noticed asymmetric peak appears at the resonance vicinity.

Citation Download Citation

Shahrul Kadri, Hideki Fujiwara, and Keiji Sasaki "Photo-induced forces on AFM cantilever by externally modulated laser", Proc. SPIE 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 75081S (23 November 2009); https://doi.org/10.1117/12.839932

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