Conference Agenda

DMD-based light-field generation through an MLA is a promising method for compact beam shaping, although diffractive effects can degrade the optical field as propagation distance increases. Implementing wavefront control closer to the DMD via metalenses offers a compact alternative to mitigate these effects. We investigate a preliminary workflow for automated metalens design based on prescribed ray bundles. From a target ray geometry, continuous phase maps and corresponding nanopillar layouts are generated automatically. This deterministic approach utilizes numerical integration of phase gradients derived from the generalized Snell’s law to achieve the necessary beam redirection. The method is demonstrated through the design and wave-propagation simulation of a metalens that focuses an obliquely incident beam onto specific positions on a DMD mirror. Simulation results confirm that the synthesized phase maps produce the expected off-axis focusing behavior, with propagated intensity distributions verifying redirection to the target focal regions. These results provide a practical basis for integrating metalenses into compact DMD-based light-field systems.

We study the three-dimensional polarization properties of random evanescent wave. We investigate the degrees of polarimetric purity, polarimetric dimensions, nonregularity properties, and spin density vectors of the electric and magnetic fields. Both fields show similarities and differences in their polarimetric properties while they have the same polarimetric properties under a specific geometry.

Optical beams exhibiting skyrmionic textures of the Stokes vector have recently emerged as a promising platform due to their intrinsic topological protection and rich polarization structure. However, compact and versatile approaches for their generation and control are still lacking. Here, we report dual-functional dielectric metasurfaces enabling the tailored generation and reconfigurable control of skyrmionic light fields during propagation. By exploiting anisotropic metaatoms, the designed metaoptics allow simultaneous and asymmetric manipulation of orthogonal polarization states within a single element, yielding full Poincaré beams with skyrmionic topology in 2D and 3D (optical hopfions). Advanced phase engineering enable a rich variety of dynamical effects during propagation as polarization beating and topology reconfigurability. This work demonstrates a versatile framework for the custom generation and manipulation of topological beams, opening new opportunities for robust photonic functionalities in emerging technologies based on topological invariants.

We investigate the far-field scattered intensity from an achiral plasmonic nanostructure due to circularly polarised illumination. We show that for angle dependant responses like circular intensity differential scattering there is a pronounced spin dependence. By analysing the induced polarisation and from multipole analysis we see that excitation of higher order moments leads to this spin dependent response. These results demonstrate the possibility of spin-dependent scattering even in achiral structures, providing new insight into light-matter interactions and offering opportunities for polarisation-controlled nanophotonic devices.

With the ongoing development of nanophotonic platforms in the

field of optical image processing, the forward trial-and-error method is

becoming computationally expensive. In this paper, we proposed an efficient

inverse design methodology for a nanophotonics platform, which is more

computationally effective than a conventional genetic algorithm to get the

desired target function. Our methodology includes an RCWA-based genetic

algorithm strengthened by a data-driven U-NET model to inversely design

the metasurface, enhancing control over the emitted light field for s-

polarization selective optical edge detection imaging. The generated

metasurface is demonstrated to preserve the strong suppression of

background content while retaining only the object's boundaries for edge

detection imaging which is crucial for large-scale low power computational

imaging, augmented reality, and autonomous driving

We present a silicon nitride photonic nanoantenna enabling efficient

waveguide-to-free-space coupling. Vertically coupled to a silicon waveguide,

the antenna, with a radius of 750 nm, achieves 3 dB scattering efficiency for

high-density optical phased arrays.