English

Progress in the research and development of high-performance electrically pumped topology lasers in semiconductor manufacturing

1177
2024-07-11 11:48:51
See translation

Topological laser (TL) is an ideal light source for future new optoelectronic integrated chips, designed and manufactured using topological optics principles to obtain robust single-mode lasers. Electrically pumped topology lasers have become a research hotspot due to their small size and ease of integration, but topology lasers based on electrical injection are still in the early stages of research. Therefore, it is crucial to develop design ideas and technical solutions to improve the output power of electrically pumped topology lasers.

Recently, Liu Fengqi, a researcher from the Institute of Semiconductor, Chinese Academy of Sciences, has made progress in the research and development of high-performance electrically pumped topology lasers. This study innovatively introduces the design of surface metal Dirac topological cavities (SMDCs), which are prepared on the surface metal layer to preserve the integrity of the active region, providing sufficient gain for achieving high-power output, thereby solving the problem of power improvement of electrically pumped topological lasers limited by active region etching; By utilizing the strong coupling between SMDC and the active region and optimizing the design of absorption edge and topological cavity parameters under low effective refractive index difference, robust topological interband mode operation was achieved, which was validated in the robust single-mode laser spectrum and far-field mode of topological lasers with different structural parameters.

Due to the fact that the SMDC design does not damage the active region and the SMDC structure has high surface radiation efficiency, the device achieved a single mode surface emission peak power of 150 milliwatts. In addition, the device has a vortex polarization far-field, and by introducing phase modulation, while maintaining the vortex polarization characteristics of the topological laser, a symmetrical adjustable far-field is obtained. This device is an ideal on-chip vortex polarized light source.

This work provides new ideas for the research and development of high-performance electrically pumped topology lasers, and has positive significance for promoting the development and application of high-performance electrically pumped topology lasers. The relevant research results are titled High power electrically pumped terahertz topological laser based on a surface metal Dirac vortex activity and published in Nature Communications. The research work was supported by the National Natural Science Foundation of China, the National Key R&D Program and the Youth Innovation Promotion Association of the Chinese Academy of Sciences.

Structure of Electric Pumped THz SMDC TL Device

Source: Institute of Semiconductor, Chinese Academy of Sciences

Related Recommendations
  • The scientific research team of Beijing University of Technology opens up a new field of on-chip optics research

    Zhang Jun, an academician team of Beijing University of Technology, pioneered the on chip spectral multiplexing perception architecture, and independently developed the first 100 channel megapixel hyperspectral real-time imaging device in the world, creating the world's highest light energy utilization rate. On November 7, the team's relevant achievements were published in the journal Nature, and ...

    2024-11-08
    See translation
  • LM GROUP USA expands its North American office

    Recently, BLM GROUP USA, a leading manufacturer of laser tube and sheet metal processing equipment, announced that its North American headquarters in Novi, Michigan has officially started construction, with plans to add 65000 square feet of modern facilities. It is expected to be completed and put into use in the third quarter of 2025.The specific investment amount for this expansion has not been ...

    2024-08-03
    See translation
  • 150 kW Ultra High Power Laser Sensor Released

    Recently, MKS announced the launch of a brand new Ophir ® A 150 kW ultra-high power laser sensor designed specifically for measuring ultra-high power levels up to 150 kW. This sensor has excellent accuracy and reliability, suitable for industrial and defense fields.This water-cooled calorimeter has a working wavelength range of 900-1100 nm and can measure power from 10 kW to 150 kW. Its extremely ...

    2024-12-27
    See translation
  • Lameditech of South Korea was listed on the KOSDAQ exchange on the 17th

    On June 11, 2024, Korean laser medical equipment manufacturer Lameditech successfully completed its initial public offering and was listed on the KOSDAQ exchange on the 17th.Last month, its public offering price was fixed at 16000 Korean won. In this public offering, Lameditech issued a total of 1298000 shares, raising approximately 20.8 billion Korean won. Since Lameditech's debut on KOSDAQ, as o...

    2024-06-26
    See translation
  • Scientists at St. Andrews University have made significant breakthroughs in compact laser research

    Scientists at St. Andrews University have made significant breakthroughs in compact laser research after decades of hard work.Laser is widely used in fields such as communication, medicine, measurement, manufacturing, and measurement around the world. They are used to transmit information on the internet, for medical purposes, and even in facial scanners on mobile phones. Most of these lasers are...

    2023-10-04
    See translation