Educational background：Postgraduate student

Degree：Master

Status：Finish school

Thesis title：Optimal design and preparation of infrared/visible invisible silicon photonic crystals

Research direction：Wave absorption

Destination after graduation：Wanhua Chemical

Introduce：In order to improve the survivability and combat effectiveness of weapons and equipment in modern high-tech wars, stealth technology has become the focus of the world's military powers. Photonic crystals can be used as ideal infrared stealth materials because of their adjustable photonic band gap and infrared radiation properties and flexible structure adjustment. At present, although there are many reports on the design and preparation of photonic crystals at home and abroad, few studies combine theoretical simulation calculation with experiments to optimize the design of photonic crystal structure and preparation process to guide the subsequent preparation process. In most reports, high refractive index materials generally choose Ge and Te, which are easy to oxidize or melt and difficult to meet the requirements of use in harsh environments, and the reserves are small, which is not conducive to practical promotion and application. Si material can be used as an ideal material for photonic crystals because of its abundant reserves, mature purification technology and stable chemical properties. The purpose of this work is to first explore the process parameters of each single layer thin film, and then construct a general photonic crystal model by using the transfer matrix method and equivalent interface theory. Under this guidance, [Si/SiO₂]N and [Si/ZnS]N silicon-based photonic crystals, which can realize infrared/visible invisibility, were prepared by magnetron sputtering method.

Enrollment date：2020-09-01

Graduation date：2023-06-25