English

Laser induced 2D material modification: from atomic scale to electronic scale

1278
2024-02-23 14:44:13
See translation

Background Introduction
Two dimensional materials have attracted widespread attention due to their atomic level thickness and unique properties, such as high binding energy, tunable bandgap, and new electronic degrees of freedom (valley electronics). They have many application prospects in fields such as microelectronics, nanophotonics, and nanoenergy. Various two-dimensional materials have their own advantages and disadvantages in terms of physical properties, and modifying two-dimensional materials can break through the limitations of their original properties in terms of application scope. Laser modification, as a non-contact processing technology, has the characteristics of high efficiency, high flexibility, and high spatiotemporal resolution, and is a powerful means of modifying two-dimensional materials.

Figure 1. Precise control of laser thinning of two-dimensional materials by monitoring thickness and/or self passivation

Quick News Highlights
Recently, Associate Professors Lin Linhan and Sun Hongbo from Tsinghua University published a review article on optical modification of two-dimensional materials from atomic to electronic scales in JPCC.

Figure 2. Laser assisted defect repair and exciton modulation
In the past decade, the interaction between light and two-dimensional materials has received much attention. The excitation of electrons under light can be utilized in optoelectronic and nanophotonic devices, and a profound understanding of the interactions between various light and two-dimensional materials enables researchers to change the geometric morphology, chemical composition, electronic structure, and even atomic structure of two-dimensional materials. This provides new strategies for on-demand manipulation of the optical, thermal, or electrical properties of two-dimensional materials and further expands their applications.

In the process of laser modification of two-dimensional materials, laser can directly excite electrons in the two-dimensional materials, change the electronic structure and even atomic structure of the two-dimensional materials, achieve photoconductivity control and photo induced ultrafast phase transition; It can also serve as an energy source for heat during the modification process, indirectly achieving the modification of two-dimensional materials through photothermal effects, achieving oxidation and sublimation etching of two-dimensional materials, photothermal phase transition, photothermal reduction of graphene oxide, etc; In laser-induced doping and some oxidation reactions, lasers can also assist two-dimensional materials in reacting with other substances to generate new materials with excellent performance. Focusing on graphene and transition metal chalcogenides (TMDs), the author reviewed the interactions between light and two-dimensional materials from different perspectives and discussed cutting-edge optical processing modification techniques to change the morphology and atomic structure of two-dimensional materials, and adjust their electrical and optical properties as needed; Outlined its basic mechanism, technological development, and applications, and introduced its views on future challenges and opportunities.

Source: Laser Manufacturing Network

Related Recommendations
  • IPG launches dual beam fiber laser for additive manufacturing applications

    Recently, American fiber laser giant IPG Photonics announced the launch of a new laser series specifically designed for the additive manufacturing field.The highlight of this series of lasers lies in its integration of IPG's unique dual beam technology, which can independently regulate and simultaneously emit core and ring beams, setting a new benchmark in accuracy, efficiency, and reliability.Ba...

    2024-11-25
    See translation
  • Israeli startup has developed a new laser powder bed fusion technology (SLS)

    Starting company 3DM from Israel has developed a new laser powder bed fusion technology (SLS) and recently released its first product. It is reported that the new technology developed by this young company established in 2016 will open up the possibility of new materials.3DM quantum cascade laserThe quantum cascade laser (QCL) stands out in the competition of 3DM in the SLS field. QCL was develope...

    2023-10-27
    See translation
  • Laser driven leap forward: the next generation of magnetic devices for controlling light is born

    Recently, a new laser heating technology developed by a Japanese research group has paved the way for advanced optical communication equipment by integrating transparent magnetic materials into optical circuits.This breakthrough was recently published in the journal Optical Materials. It is crucial for integrating magneto-optical materials and optical circuits, which has been a significant long-te...

    2023-12-21
    See translation
  • Ultra fast laser nova PulseX Laser completes over 10 million yuan of financing

    PulseX Laser, a rising star in the field of ultrafast lasers, has recently completed a financing of over 10 million yuan, with this round of financing exclusively invested by Changlei Capital.As a representative of the forefront of technology today, ultrafast lasers play an important role in many industries. In the field of material processing, ultrafast lasers, with their ultra short pulse width ...

    2024-07-09
    See translation
  • The research team from the School of Engineering at Columbia University in the United States has broken through the "bandwidth bottleneck" of high-performance computing in new photonic chips

    When running various artificial intelligence programs such as large language models, although data centers and high-performance computers are not limited by the computing power of their individual nodes, the amount of data transmitted between nodes is currently the root cause of the limitations on the performance and bandwidth transmission of these systems.Because some nodes in the system are more...

    2023-10-31
    See translation