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We investigate laser ablation of crystalline silicon induced by a femtosecond optical vortex beam, addressing how beam properties can be obtained by analyzing the ablation crater. The morphology of the surface structures formed in the annular crater surface allows direct visualization of the beam polarization, while analysis of the crater size provides beam(More)
In this paper, a remote listening device is proposed as a possible application of piezoelectric energy harvesting. First, a brief overview of the piezoelectric phenomenon is given. This is followed by an explanation of the proposed setup for harvesting piezoelectricity. Next, a Data acquisition and Transmission model for the listening device is discussed(More)
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