'Micro- and nano-photonics' is a course for PhD candidates in School of Optoelectronics, Beijing Institute of Technology. The aim of the course is to introduce the recent development of micro- and nano-photonics to PhD students of optical engineering. The teaching content includes new branches of photonics, including basic theories and developments of plasmonics, matamaterials, photonics crystals and fibers. Then theoretical analysis of nanophotonics, as well as the simulation methods and software are introduced. The fabrication methods of nanophotonic devices are also introduced. More than 30 PhD students have been taught by this course since 2012. In this paper, we give an introduction about our course and its effects on the students' research. We also give a discussion about how to give class to PhD students with backgrounds of optics and photonics.
The real-time holographic display encounters heavy computational load of computer-generated holograms and precisely intensity modulation of 3D images reconstructed by phase-only holograms. In this study, we demonstrate a method for reducing memory usage and modulating the intensity in 3D holographic display. The proposed method can eliminate the redundant information of holograms by employing the non-uniform sampling technique. By combining with the novel look-up table method, 70% reduction in the storage amount can be reached. The gray-scale modulation of 3D images reconstructed by phase-only holograms can be extended either. We perform both numerical simulations and optical experiments to verify the practicability of this method, and the results match well with each other. It is believed that the proposed method can be used in 3D dynamic holographic display and design of the diffractive phase elements.