In recent years, the laboratory team building has made outstanding progress. In 2005 and 2007, it was selected into two innovative research groups of the National Foundation of China; in 2006, it was selected into an innovative research team of the Ministry of Education.

Currently, as the chief unit laboratory, it undertakes three national 973 and major research plan projects.

In recent years, the laboratory has also won 4 second prizes of the National Natural Science Award and more than ten provincial and ministerial awards.

1. LEED (Low Energy Electron Diffraction) and ELS (Electron Energy Loss Spectroscopy) of surface and interface atomic structures were studied such as Si(001)2X1, Si(001)C(4X2), Pb/Si, Pb/Ge, etc.

He developed new experimental methods for the atomic structure of the interface, and won the first prize for Science and Technology Progress Award from the State Education Commission in 1997.

2. Development of fiber Bragg grating emission filter (FBR) and single-frequency narrow-to-wide FBR semiconductor laser. The side grinding and polishing method is used to form a phase grating with periodic modulation of refractive index in single-mode communication fiber, and a narrow-band and highly reflective fiber optic fiber is successfully developed.

The fiber grating device has reached the international level and won the Eighth Five-year Science and Technology Major Achievements Award in 1996.

3.

The research and development of GaN-based blue light-emitting diodes (LEDs) is based on MOCVD technology. With the support of 863, a series of major results have been achieved in nitride research and related high-tech products.

Obtained 2 national invention patents.

4．

Research on optical nonlinearity of organic and polymer molecules is the first in the world to study the third-order nonlinear optical properties of the three-dimensional p-electron-conjugated molecule sulfene molecular cluster C60, C70 series, creating a new field of research on new optical functional materials; carrying out polymerization

Research on photorefraction of matter, the paper has been cited a lot.

He won the second prize of Beijing Science and Technology Award in 1997 and the second prize of University Science and Technology Award in 2001.

5．

Development of a combined ultrahigh vacuum (UHV) scanning electron microscope (SEM) and scanning tunneling microscope system The biggest advantage of the scanning tunneling microscope (STM) is its atomic resolution capability.

However, the narrow field of vision associated with this has become its fatal weakness.

In order to give full play to the power of STM, a combined ultrahigh vacuum (UHV) scanning electron microscope (SEM) scanning tunneling microscope system was successfully developed.

In this system, the STM tip can find any nanostructure of interest on a macroscopic sample with the help of SEM, and observe it up to atomic resolution.

6. Experimental research on the generation of spiral wave instability and defect chaos. Important discoveries have been made in the experimental research on the generation mechanism of spiral wave instability and defect chaos.

Three different types of spiral wave instability mechanisms have been discovered in experiments: long wave instability, Doppler instability and decoupling instability.

This result has attracted widespread attention from the international nonlinear physics community.

Especially Doppler instability, its generation mechanism is likely to be closely related to the fatal phenomenon of heart fibrillation.

The next goal is to control defect chaos in experiments.

Theoretical calculations show that a voltage of about 5 millivolts can lead the spiral waves in the heart out of the heart.

This will provide theoretical and experimental basis for developing new methods to treat atrial fibrillation.

7.

Research on New Nonlinear Optical Limiting Materials When the transmittance of the material decreases as the incident light increases, it is called the nonlinear optical limiting effect, or optical limiting effect for short.

It has good application prospects in the fields of laser protection of human eyes and detectors and optical communications.

Current research hotspots mainly focus on the development of new optical limiting materials with excellent performance.

We established a nanosecond nonlinear optical limiting experimental system using YAG laser as the light source.

He has conducted systematic theoretical and experimental research on various nonlinear optical limiting materials such as fullerene derivatives, phthalocyanine compounds, transition metal clusters, organic dyes, and organometallic compounds.

8. Femtosecond photoacoustic spectroscopy experiments and applied research established the world’s first thickness measurement system that combines femtosecond laser technology and accurate light deflection measurement methods.

Using femtosecond laser pulses we have detected for the first time ultrafast coherent phonon excitation and propagation processes within single crystal germanium flakes.

This new accurate thickness measurement technology overcomes the problems that traditional single-sided reflection thickness measurement technology cannot solve.

This method is simple and easy to implement, the measurement is non-contact and non-destructive, and the measurement accuracy is better than sub-micron.

9. Nanomaterial preparation research uses plasma-enhanced CVD method to successfully prepare large-area, highly oriented carbon nanotube films on different substrates.

This carbon nanotube film has the advantages of simple preparation and good quality (high degree of graphitization), laying a good material foundation for further research on field emission image display technology.

10.

Development of photonic crystals using electron beam-induced deposition of nanocarbons Photonic crystals (PC) have become the physical basis for new photonic devices and future all-optical integrated circuits.

A unique technology is proposed to overcome the difficulties of deep submicron processing, thereby developing a new technology for preparing photonic crystals.

Without photoresist and external mask, one-dimensional and two-dimensional micron periodic photonic crystal structures are formed through direct writing and direct etching, with a typical size of about 100-150 nanometers and a period of about 300-350 nanometers.