Ελληνικά

The world's first tunable wavelength blue semiconductor laser

740
2024-11-23 11:06:56
Δείτε τη μετάφραση

Recently, researchers from Osaka University in Japan have developed the world's first compact, wavelength tunable blue semiconductor laser in a new study. This breakthrough paves the way for far ultraviolet light technology and brings enormous potential for applications such as virus inactivation and bacterial disinfection. The research results have been published in the journal Applied Physics Letters.

 



Figure 1 (a) Schematic diagram of a tunable single-mode laser with periodic slotted structure; (b) Cross sectional side view of slotted channel. Source: Taisei Kusui, Takumi Wada, Naritoshi Matsushita et al., "Continuous wave operation of InGaN tunable single mode laser with periodically slotted structure", Applied Physics Express (2024)

Researchers from Osaka University in Japan have previously demonstrated that a transverse quasi phase matching device made of aluminum nitride and a vertical microcavity wavelength conversion device containing SrB4O7 nonlinear optical crystals can generate far ultraviolet second harmonic (SHG) at wavelengths below 230 nm.

Usually, these advanced devices require large and expensive ultra short pulse lasers as excitation sources. However, achieving practical far ultraviolet light sources requires a blue semiconductor laser with a wavelength of approximately 460 nm.

Blue nitride semiconductor lasers were originally designed for blue light technology and have now expanded to the processing of metal materials such as copper and gold, with the potential to be applied in the next generation of laser display technology. However, the oscillation wavelengths of these blue light lasers are usually multiple.

Efficient wavelength conversion devices have a very narrow wavelength receiving bandwidth, making single wavelength lasers an ideal excitation source. In addition, precise wavelength control and adjustability are also essential. Although several single wavelength blue light lasers with coarse periodic structures have been reported, none of them can achieve tunable wavelength control.

Our tunable wavelength nitride semiconductor laser oscillates in the 405 nm wavelength band, but its structure can also be easily adjusted to 460 nm, "explained Kusui Taisei, the lead author of the research team." Combined with our new wavelength conversion device, this laser can create a compact and practical far ultraviolet light source suitable for continuous use in indoor environments, effectively sterilizing and disinfecting.

With its compact design and longer lifespan, this technology can be seamlessly integrated into household appliances such as refrigerators and air conditioners, providing healthier and safer living conditions for the home environment and bringing extensive benefits to public health.

Source: Yangtze River Delta Laser Alliance

Σχετικές προτάσεις
  • Generating dark and entangled states in optical cavities: unlocking new possibilities in quantum metrology

    Physicists have been working hard to improve the accuracy of atomic clocks, which are the most precise timing devices currently available. A promising way to achieve higher accuracy is to utilize spin squeezed states in clock atoms.Spin squeezed states are entangled quantum states in which particles work together to counteract their inherent quantum noise. These states provide incredible potential...

    2024-02-20
    Δείτε τη μετάφραση
  • Halo Industries raises 580 million yuan to achieve significant breakthrough in SiC laser processing field

    Recently, Halo Industries, an innovative technology company based in California, announced that it has successfully raised $80 million in Series B venture capital, marking a significant breakthrough in its use of laser technology to revolutionize the production of silicon carbide (SiC) semiconductor wafer substrates.This financing is led by the US Innovation Technology Fund (USIT) and involves hea...

    2024-07-18
    Δείτε τη μετάφραση
  • Two photon absorption quantum mechanism breaks through the resolution and efficiency limits of optical nanoprinting

    Recently, a research team from the School of Physics and Optoelectronic Engineering at Jinan University has elucidated for the first time the time-dependent quantum mechanism of two-photon absorption and proposed a two-photon absorption (fpTPA) optical nanoprinting technology based on few photon irradiation, successfully breaking through the bottleneck of traditional two-photon printing technology...

    03-06
    Δείτε τη μετάφραση
  • Laser ablation helps to trace the origin of medieval metals

    Archaeologists have long wondered why the people of Anglo Saxon England began using more silver coins and fewer gold coins between 660 and 750 AD. Researchers in Europe now say they have developed a method to help find the answer. This technology combines laser ablation with traditional trace element analysis to match the isotopic abundance of silver bars in coins with known sources of metal ores ...

    2024-04-13
    Δείτε τη μετάφραση
  • The fiber laser system overcomes outdated issues through a PC based EtherCAT control platform

    In order to maintain relevance and success, companies with a long history must respect their past while not ignoring the future. This is the method adopted by Cincinnati Corporation (CI), a metal processing machinery manufacturer based in Harrison, Ohio, since its establishment in the late 1890s.The company is carefully considering technological changes. Incorrect selection of control hardware, ne...

    2024-05-25
    Δείτε τη μετάφραση