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We successfully design one photoacoustic microbeam-oscillator actuated by nanosecond laser, which exhibits tunable resonance direction and amplitude. The mechanism of laser induced oscillation is systematically analyzed. Both simulation and experimental results reveal that the laser induced acoustic wave propagates in a multi-reflected mode, resulting in resonance in the oscillator. This newly-fabricated...
Very recently, the subtractive color filters with transmission efficiencies of 60~70% at visible wavelengths, observed in ultrathin (30nm-thick) Ag film with one dimensional (1D) nanogratings, have been reported, which fundamentally differ from existing additive color filters. However, subtractive color filters with ultrathin 1D Ag nanogratings are strongly dependent on the polarization of light source,...
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