Papers by Author: Guang Ya Zhou

Abstract: The impact of developing nanophotonic components have proven to be a promising research on the future optical integrated circuit complementing the current scaling of semiconductors for faster board-board, chip-chip interconnect speeds. Essentially photonic crystals (PhC) symbolize an emerging class of periodic nanomaterials that offers flexibilities in achieving novel devices. Based on the investigations of the high-Q resonance mode energy distributions, we optimized the nano­scale tip for optimal perturbative effect with low loss resonance control in the optical near field regime. In this study to achieve larger spectral resonance, we proposed using a novel doubly nano­scale perturbative tip to achieve optimal accurate photonic crystal resonance control. Such method may be driven by a nano-electromechanical (NEMS) system that may be fabricated with monolithic approaches.

Abstract: A liquid tunable diffractive/refractive hybrid lens which combines the use of high precision diamond turning and soft lithography is developed in this work. This diffractive/refractive hybrid lens comprises a Fresnel lens and a tunable refractive lens automatically aligned during the fabrication process. Multiple PDMS hybrid lens devices can be fabricated from the diamond-turned master mould and AFM results show that the surface quality of the PDMS lenses meets the requirements for optical purposes. The hybrid lens is tested with a green laser (λ = 532nm) and experimental results demonstrate a tunability of more than 20mm.