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We have developed micro-nano structures as photonic sensors based on the observation of external reflectivity profiles. Spectra interference patterns as a function of the angle of incidence for both s and p polarizations directions as well as a phase shift between s and p polarisation are obtained. Also the reflectivity of the photonic structures is calculated and analyzed over a wide range of wavelengths...
We present a new wide-aperture, line-focused ultrasonic material characterization system. The foci of the transmitting and receiving transducers are located in the specimen-immersion liquid interface; and the output voltage V(x, t) of the system is recorded as a function of the lateral position of the receiving transducer. The two-dimensional spectrum of V(x, t) can be expressed as a product of the...
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