Conventional optical components such as lenses, waveplates and holograms rely on light
propagation over distances much larger than the wavelength to shape wavefronts. In this …

In nature, optical structures in the subwavelength range have been evolved over millions of
years. For example, in the form of 'moth‐eye'structures they show a strong anti‐reflective …

We report here on the theoretical performance of blazed binary diffractive elements
composed of pillars carefully arranged on a two-dimensional grid whose period is smaller …

Flat lenses enable thinner, lighter, and simpler imaging systems. However, large-area and
high-NA flat lenses have been elusive due to computational and fabrication challenges …

We formulate and apply an efficient finite-difference time-domain algorithm to the analysis of
axially symmetric diffractive optical elements. We discuss aspects relating to minimizing …

A two-dimensional (2D) subwavelength nanostructure for antireflection coating is fabricated
upon a transparent substrate. Self-assembled 2D colloidal crystals are used as a nanoscale …

Рассматривается формирование изображений дифракционной линзой. Проведён
аналитический и численный расчёт формирования изображений при освещении …

We designed, fabricated, and characterized a binary diffractive lens with features less than
60 nm. The lens was designed for operation in the red portion of the spectrum. Experimental …

Herein, we propose a special type of periodic subwavelength structure, which is optically an
effective gradient-index (GRIN) antireflective surface that also exhibits enhanced …

A procedure for designing binary diffractive lenses by use of pulse-width-modulated
subwavelength features is discussed. The procedure is based on the combination of two …