A research team at POSTECH has developed a novel multidimensional sampling theory to overcome the limitations of flat optics.

This study introduces a multidimensional sampling theory, overcoming Nyquist limitations and enhancing metasurface design for advanced optical applications.

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With pulsed Doppler, a velocity spectrum is acquired over time inside a sample volume that is positioned by the operator, normally in the vessel center and covering at least two thirds of the vessel ...

The results of three kinds of polarization analysis show that the TF-domain polarization analysis can accurately determine the polarization direction of multi-type signals in the case of aliasing.