English

Using Topological Photon Chips to Uncover the Secrets of Open Systems

1142
2024-02-02 18:08:02
See translation

Conservation of energy is a fundamental concept in physics that can be used to explain anything from planetary orbits to the internal workings of individual atoms.

Energy can be converted into other forms, but the overall energy level is usually considered to vary over time. Therefore, when attempting to describe a system, physicists usually pay attention to ensuring that it is isolated from the surrounding environment.

However, if the energy gain and loss are distributed in an orderly manner, so that they cancel each other out in all possible situations, the dynamics of the system can also be stable. This can be ensured through a phenomenon called parity check time symmetry.

All components of the system are carefully arranged to exchange the gain and loss of light through simultaneous mirroring and time reversal, making the system appear unchanged, just like a video played backwards and simultaneously reflected in a mirror, but looking exactly the same as the original video, which means it is PT symmetric.

PT symmetry is not just an academic concept; On the contrary, it opens the door to a more thorough understanding of open systems.

Professor Alexander Szameit from Rostock University specializes in studying interesting physical phenomena related to PT symmetry. Laser can replicate the behavior of artificial and natural materials arranged in periodic lattice structures in their customized photonic chips, making them an excellent platform for testing various physical theories.

Therefore, Professor Szameit and his colleagues successfully integrated the ideas of topology and PT symmetry. Topology is the study of properties that remain unchanged even when the underlying system is constantly deformed. When a system possesses these qualities, it becomes particularly resistant to external influences.

Szameit's team used laser engraved photonic waveguides in their experiments, which are optical structures etched into materials by laser beams.

In these "optical circuits," so-called topological insulators are implemented.
So far, people believe that open systems and this powerful boundary state are fundamentally incompatible. Researchers from Rostock, Vilzburg, and Indianapolis have jointly demonstrated that it is possible to address the apparent paradox by dynamically allocating benefits and losses over time.

These findings may pave the way for the development of new cutting-edge circuits for transmitting sound, light, and even electricity. These findings also represent significant advances in the understanding of topological insulators and open systems.

This study was funded by the German Research Foundation and supported by the Alfred Krupp von Boren and the Halbach Foundation.

Source: Laser Net


Related Recommendations
  • TDK introduces a new gold-wire-bonded optional NTC thermistor for laser diode temperature measurement

    TDK Corporation (TSE: 6762) announced the introduction of the new NTCWS series of NTC thermistors with gold wire bonding. These bonding NTC thermistors can be installed in packages via gold wire bonding to enable high precision temperature detection of laser diodes (LD) for optical communication. The series will begin mass production in September 2023.The use of LD devices in optical communication...

    2023-09-08
    See translation
  • Sivers will develop laser arrays for artificial intelligence and deliver prototypes in 2024

    Sivers Optics, a subsidiary of Sivers Semiconductors, has signed a product development agreement with an undisclosed company.Starting from the initial contract worth $1.3 million, the prototype will be delivered in 2024, and it is expected that the agreement will grow rapidly in 2025 before transitioning to mass production. After entering full production, customers expect the annual chip productio...

    2024-03-18
    See translation
  • HENGTONG listed on the Fortune Global 500 list of brands

    Recently, the 2024 (21st) World Brand 500 ranking list exclusively compiled by World Brand Lab was released in New York, USA. HENGTONG brand participated in the selection for the first time, standing out from more than 8000 participating brands in 32 countries worldwide and ranking 395th on the "Top 500 World Brands" list. This year, there are a total of 21 new brands on the global list, of whic...

    2024-12-17
    See translation
  • An efficient femtosecond pulse amplification technique for extracting the maximum stored energy in fiber laser amplifiers

    The well-known journal Optica published a paper in November 2024 titled "Near complete extraction of maximum stored energy from large core fibers using coherent pulse stacking amplification of femtosecond pulses"The authors of the paper were the University of Michigan, Lawrence Berkeley National Laboratory, Peking University, and the German Institute of Synchrotron Radiation.The specific technique...

    2024-11-13
    See translation
  • Mirico successfully raised $2 million with unique laser dispersion spectroscopy technology

    In the field of high-performance gas sensing intelligence, Mirico stands out with its unique laser dispersive spectroscopy (LDS) technology, successfully raising $2 million in the latest round of financing.Recently, Mirico announced this good news. This financing is led by Shell Ventures and New Climate Ventures, with support from the UK Innovation and Science Seed Fund (UKI2S) and other existing ...

    2024-06-28
    See translation