Reciprocal spin-orbit coupling (SOC) via geometric phase with flat optics provides a promising platform for shaping and controlling paraxial structured light. Current devices, from the pioneering q-plates to recent J-plates, provide only spin-dependent wavefront modulation without amplitude control. However, achieving control over all spatial dimensions of SOC states requires corresponding comp...

In this work, we study the black hole light echoes in terms of two-photon autocorrelation and explore their connection with quasinormal modes. It is shown that above time-domain phenomenon can be analyzed by utilizing well-known frequency-domain relations between modes characteristic parameters null geodesics. We found correlator, obtained inverse Fourier transform, naturally acquires echo feat...

It is well accepted that uncertainties still persist regarding the quantitative contribution of ice clouds to the radiative balance of the Earth [1]. Techniques for modelling the interaction of light with ice crystals found in these clouds have helped reduce this uncertainty; however techniques such as the discrete dipole approximation (DDA) [2] and T-matrix [3] are computationally expensive fo...