English

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

206
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
  • Progress has been made in the corrosion mechanism of alkali aluminum phosphate glass at Shanghai Optics and Machinery Institute

    Recently, the Advanced Laser and Optoelectronic Functional Materials Department of the Shanghai Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, has made new progress in the corrosion mechanism of alkali aluminophosphate glass. The research findings were published in The Journal of Physical Chemistry C under the title "Formation Mechanism of Crystal Phase during Corrosion ...

    2024-07-10
    See translation
  • Comparative Study of Resistance Spot Welding and Laser Spot Welding of Ultra High Strength Steel for Vehicles

    Researchers from Annamarai University in India and South Ural State University in Russia reported a comparative study of resistance spot welding and laser spot welding of ultra-high strength steel for automobiles. The related research was published in The International Journal of Lightweight Materials and Manufacturing under the title "A comparative study on resistance spot and laser beam spot wel...

    2024-09-05
    See translation
  • The First Ultra Fast Laser Application Development Conference was held in Songshan Lake, Dongguan

    The First Ultra Fast Laser Application Development Conference was held in Songshan Lake, Dongguan. The first advanced attosecond laser facility in China will have 8 beam lines landing in Dongguan.Laser enjoys the reputation of being the "fastest knife," "most accurate ruler," and "brightest light," among others. As an important research direction in the laser field, ultrafast laser has always been...

    2023-10-28
    See translation
  • Theoretical physicist Farok Miwivar studied the interaction between two sets of luminescent atoms in a quantum cavity

    Theoretical physicist Farok Miwivar studied the interaction between two sets of luminescent atoms in a quantum cavity - a quantum cavity is an optical device composed of two excellent small mirrors that can capture light in a small area for a long time.This model and its predictions can be used for the next generation of superradiance lasers. They can be used and observed in cutting-edge cavity/wa...

    2024-02-21
    See translation
  • EO Technologies from South Korea enters the glass substrate processing market

    Recently, EO Technologies, a well-known semiconductor laser processing equipment manufacturer in South Korea, is emerging in the glass substrate processing market.It is understood that EO Technologies is entering the glass substrate TGV market based on its UV laser drilling equipment originally used in PCB substrate technology. TGV technology is the core process for drilling holes inside glass sub...

    2024-06-18
    See translation