Chinese scientists have developed a new type of germanide semiconductor quantum well laser

[ Instrument Network Instrument Development ] Telluride semiconductor materials have important application prospects in the fields of infrared guidance, ocean monitoring, deep space exploration, etc. With the continuous advancement of molecular beam epitaxy technology of germanium multi-element complex low-dimensional materials, international germanium semiconductors The related materials and optoelectronic device technology innovations are developing very rapidly, and the developed countries such as the United States, Japan, and Germany are competing to conduct research and attract people's attention.

Under the support of the National 973 Program and the National Natural Science Foundation of China, the team of researchers from the Institute of Semiconductors of the Chinese Academy of Sciences, Niu Zhichuan, conducted in-depth research on the basic physics of germanide semiconductor materials, epitaxial growth of heterojunction low-dimensional materials, and fabrication techniques of optoelectronic devices. Breaking through the core process technologies such as etching and passivation of germanium quantum well lasers. On this basis, the research team innovatively designed the metal grating laterally coupled distributed feedback (LC-DFB) structure, successfully realized the high-performance single-mode laser with 2μm band, and the side mode suppression ratio reached 53dB, which is the highest value of the current similar devices; The output power reaches 40mW, which is more than three times that of current similar devices. In the high-power laser of bismuth quantum well, the FP cavity quantum well high-power laser single-tube and bar module realizes the continuous output power of room temperature of 1.62 watts and 16 watts respectively, and the comprehensive performance reaches the international first-class level and breaks through the import limit performance of foreign high-end lasers. Provisions.

This achievement has aroused widespread concern in the international academic community and industry. "Compound Semiconductor" commented that "the single-mode laser pioneered the enhancement of the side mode suppression ratio, providing a competitive light source device for space-based satellite-borne LIDAR systems and gas detection systems. ". The research results have overcome the key technologies in the field of short-wave infrared lasers, and have very broad application value in many high-tech industries such as hazardous gas detection, environmental monitoring, medical and laser processing.

(Original title: Chinese scientists have developed a new type of germanide semiconductor quantum well laser)