Japan develops a new "laser" that does not use light

A groundbreaking development has been made by Professor Yamamoto Hiji's research team at Japan's National Institute of Informatics. They have successfully created a novel "laser" that doesn't rely on light, marking a significant shift in the field of photonics and electronics. Instead of traditional light waves, the team utilized "excited particles"—specifically, electron holes that interact with one another—to generate the laser effect. This innovative approach allows the device to be activated through particle interactions, offering a completely new mechanism for light generation. What makes this technology particularly remarkable is its incredibly low power consumption—less than 1% of conventional lasers. This breakthrough could revolutionize the way information is transferred within large-scale integrated circuits (LSIs). By replacing traditional electrical signals with this new type of laser, future electronic devices may become significantly more energy-efficient. The study was recently published in the prestigious journal *Nature*, highlighting its importance in the scientific community. The researchers achieved this by using electromagnetic waves with a wavelength of 800 nm to interact with "excited particles" in a semiconductor. These particles, which are extremely light—only a thousandth the mass of a hydrogen atom—are wave-like in nature. Through careful manipulation, the team managed to reduce their effective mass to less than one ten-thousandth of normal "excited particles." In a specially designed semiconductor structure, the team was able to resonate these electromagnetic waves with the excited particles, resulting in the creation of a new kind of laser. This method opens up exciting possibilities for next-generation computing technologies. Currently, electrons traveling through metal wiring in LSIs are responsible for signal transmission. However, as the demand for lower power consumption grows, researchers around the world are exploring alternatives, such as using lasers instead of electrons for data transfer. The new laser developed by Yamamoto’s team represents a major leap forward in this area, providing a more efficient and sustainable solution for signal transmission in integrated circuits. This advancement not only paves the way for more energy-efficient electronics but also highlights the potential of quantum and particle-based technologies in shaping the future of computing. With further development, this innovation could play a crucial role in reducing the energy footprint of modern electronic devices.

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