Laboratory of Nanophotonics and Novel Display of Beijing Institute of Technology is dedicated to the research work on the basic theory, technical methods and applications of novel micro-nano optical elements represented by metasurfaces, specifically involving the following directions: 1. Multiplexing holographic display and novel display; 2. Optical information processing, novel light field control; 3. Optical computing and artificial intelligence; 4.Intelligent detection and multidimensional detection; 5. Micro-nano processing; 6. Topological photonics.

Research background

Metasurface is a two-dimensional planar structure composed of artificial sub-wavelength units, which can arbitrarily control the amplitude, phase, polarization and other physical quantities of the light filed with sub-wavelength resolution. The free material selection and structural design of metasurfaces provide a huge space for people to realize novel functions, with powerful electromagnetic wave modulation capabilities beyond traditional optical elements.

Research content

1. Multiplexing holographic display and novel display

Based on the advantages of high design freedom of metasurfaces, a variety of multi-dimensional holographic hybrid multiplexing methods have been developed, which can realize multi-parameter joint control and is applied to novel display, greatly increasing the number of information channels and realizing flexible and dynamic optical modulation.

2. Optical information processing, novel light field control

Based on the basic principle of metasurface light modulation, new methods of wave front modulation are studied, and a variety of novel beam generation technologies including Airy beam, Bessel beam, generalized vortex beam, etc. are proposed, which are expected to be applied in optical communication, micro and nano manufacturing, optical detection, etc.

3. Optical computing and artificial intelligence

Based on the multiple physical properties and the high speed parallel computing capabilities of light, the application of metasurface optical diffraction neural network to realize target recognition and the all-optical method of the differential operation based on Dammann vortex metasurface are studied.

4. Intelligent detection and multidimensional detection

A variety of optical information acquisition methods such as fiber end sensing, spectral detection, and polarization detection are proposed to improve the performance of optical intelligent sensing systems and enhance the ability to acquire multi-dimensional optical information.

5. Micro-nano processing

Aiming at the metasurface involved in the research field of our laboratory, the process research of micro-nano processing methods such as Nanoscribe two-photon polymerization ( TPP ), femtosecond laser processing, electron beam lithography ( EBL, micro&nano fabrication center ) is carried out to cultivate the ablity to metasurface processing.

6. Topological photonics

By exploring the interaction between light and matter, exploring the physical nature of light modulation, studying the basic theories such as topological photonics, and combining various advanced design methods and algorithms, a foundation is laid for the application of micro-nano components.