New Progress in Research on Three Lattice Photonic Crystal Surface Emission Lasers at Changchun Institute of Optics and Mechanics

Recently, Tong Cunzhu, the research team of the Chinese President of Science, Chunguang Institute of Mechanical Mechanics, made important progress in the research field of photonic crystal surface emitting lasers (PCSEL), proposed a three lattice structure and achieved a low threshold 1550nm PCSEL. Relevant achievements were published in Light: Science and Application vol.13, 442024, and the famous international semiconductor industry publication Semiconductor Today cited "Triple lattice photo crystal laser" A news feature report was conducted on the achievement under the title.

"The 1.55 micron range of light transmission through optical fibers has the minimum loss and the advantage of high power safety for the human eye. However, traditional lasers have poor performance due to high inter band absorption in this range. The PCSEL structure can provide strong optical feedback to overcome this problem, reduce the threshold, and improve output power."

Semiconductor Today is headquartered in the UK and is a well-known international magazine and website in the semiconductor industry. It focuses on reporting on important research progress and the latest industry trends in the international semiconductor field, and has a strong industry influence.

PCSEL is currently an important research direction in the field of semiconductor lasers, which can be widely applied in various technical fields such as communication transmission, laser pumping, optical sensing, medical equipment, etc. It is defined as the core root technology by well-known leading companies in the industry. However, due to the large device size and high threshold current, the current PCSEL cannot meet the practical application needs in fields such as high-speed optical communication. This work proposes for the first time the use of a three lattice photonic crystal structure to enhance the optical feedback in the resonant cavity, and based on this, a work on 1.55 has been prepared μ The continuous pumping of InP based PCSEL in the m-band provides a new approach for reducing the size of photonic crystal cavities and lowering device thresholds. It will play an important role in applications such as high-speed optical communication and LiDAR in the future.

Structure and performance of a three lattice photonic crystal surface emitting laser

Source: Sohu