Paper 13369-68
Paper 13369-68
Design and fabrication of optical super-resolving diffractive elements
On demand | Presenting live 29 January 2025 
Abstract
Diffractive Optical Elements (DOE) are conventionally designed without regard to the exact extension or aperture of the element. We designed super-resolving DOE that are spatially band-limited and confined by a circular-amplitude aperture, based on a complex impulse response function as their design constraint. Our approach based on the theory of superoscillations uses the Prior Discrete Fourier Transform in cylindrical coordinates to produce far-field patterns with rotational symmetry. We successfully fabricated two different spot designs (below the Airy spot limit) and two phase-fragmentation variants. The DOEs were tested at four wavelengths in the visible range and the results agree well with design expectations.
Presenter
The Univ. of North Carolina at Charlotte (United States)
Menelaos K. Poutous is an Associate Professor in the Department of Physics & Optical Science, at the University of North Carolina at Charlotte, NC, USA. Prior to this position he was a Principal Development Engineer with Digital Optics Corporation, Charlotte, NC; and before that he was a Lecturer at the Physics Department of Emory University, in Atlanta, GA. He received his Doctorate degree in Physics, from the School of Physics of the Georgia Institute of Technology in 1996. His research interests are in artificial optical surfaces, diffractive micro- and nano-optical elements, photolithographic fabrication processes and, applications of diffractive elements in laser cavities and devices.