English

Progress made in the research and development of high-performance electrically pumped topology lasers by the Institute of Semiconductors, Chinese Academy of Sciences

4
2024-06-06 14:22:49
See translation

Topological laser (TL) is a laser device designed and manufactured using the principles of topological optics, which can produce a robust single-mode laser and is an ideal light source for future new optoelectronic integrated chips. 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, the team led by Liu Fengqi, a researcher at the Institute of Semiconductors, 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.

 

 

Structure of Electric Pumped THz SMDC TL Device


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.

Source: Institute of Semiconductors, Chinese Academy of Sciences

Related Recommendations
  • Scientists are using lasers to create lunar paving blocks

    Original Hal Bowman 9000 Scientific RazorThe 3 kW laser power output on a 45 mm laser spot consolidates the interlocking structure within the EAC-1A powder bed. Source: Jens Kinst, BAMBy using lasers to melt lunar soil into stronger layered materials, it is possible to build paved roads and landing pads on the moon, according to a concept validation study in a scientific report. Although these exp...

    2023-10-14
    See translation
  • The NIRPS alliance is driven by laser frequency comb technology to advance research on exoplanets

    The Near Infrared Red Planet Search Alliance, jointly managed by the Department of Astronomy at the University of Geneva and the University of Montreal, has received cutting-edge advances in CSEM laser frequency comb technology.The laser frequency comb is a precise and stable light source designed to help the NIRPS alliance unravel the mysteries of distant planets, including the possibility of sea...

    2023-12-13
    See translation
  • Swedish KTH develops 3D printed quartz glass micro optical devices on optical fibers

    In what has been described as the "first communication", Swedish researchers conducted 3D printed quartz glass micro optical devices on the tip of optical fibers. They said that this progress could lead to faster Internet and better connectivity, as well as innovations such as smaller sensors and imaging systems.Scientists from the KTH Royal Institute of Technology in Stockholm have stated that co...

    05-23
    See translation
  • Photon chips help drones fly unobstructed in weak signal areas

    With funding from the National Science Foundation of the United States, researchers at the University of Rochester are developing photonic chips that use quantum technology called "weak value amplification" to replace mechanical gyroscopes used in drones, enabling them to fly in areas where GPS signals are obstructed or unavailable.Using this quantum technology, scientists aim to provide the same ...

    2023-10-28
    See translation
  • Using a new type of ground laser to track space debris

    The Polish Space Research Center of the Celestial Geodynamics Observatory located in Borowitz near Poznan will enhance its capabilities with a new and powerful laser.The first task of this state-of-the-art device is to enable researchers to accurately track the trajectories of 300 previously identified space debris in no less than six months.Observatory Director Pawe ł Lejba emphasized the i...

    03-14
    See translation