We report on cooling of the center-of-mass motion a nanoparticle via coupling between its and optical field within high finesse cavity. The resulting is purely quadratic in displacement gives rise to van der Pol nonlinear damping. These dynamics are analogous conventional parametric feedback where cavity provides passive without an additional measurement. show experimentally that as cooling, en...

Moiré nanosphere lithography (MNSL), which features the relative in-plane rotation between two layers of self-assembled monodisperse nanospheres as masks, provides a cost-effective approach for creating moiré patterns on generic substrates. In this work, we experimentally and numerically investigate a series of moiré metasurfaces by MNSL. Due to the variety of gradient plasmonic nanostructures ...

Nanosphere lithography (NSL) is an inexpensive, high throughput, materials general nanofabrication technique capable of producing a large variety of nanoscale structures including well-ordered 2 dimensional nanoparticle arrays. In this review, we will summarize the most recent advances in the fabrication of size-tunable nanoparticles using NSL. Four examples of new NSL-derived materials will be...

Microfabrication is commonly achieved via interactions of light and a photoresist (an optically sensitive material). In this process, the light is shaped into the desired pattern by a mask and projected onto the photoresist. The entire photoresist sample is then submerged within a developer, which dissolves the exposed photoresist and leaves the unexposed photoresist intact. Mask patterns can t...