Austin Physicists from University of Texas put their heads together with their colleagues from China and Taiwan and came out with the world’s smallest semiconductor laser in a joint collaboration. This is a major breakthrough for the upcoming photonic technology dealing with applications from medicine to computing.
The miniature semi conductor lasers
The minutely created semiconductor lasers is the answer to the growth and expansion of smaller, energy based, faster and lower photon technologies. They can now come up easily with computer chips that are superfast, extremely responsive biosensors for the diagnosis and study of newly popping up diseases.
It can also aid by leading to superior communication technology in the next generation devices. Optical signals can be generated and information can be transmitted with the help of Nanolasers, which make up these photonic devices. "We have developed a nanolaser device that operates well below the 3D diffraction limit. We believe our research could have a large impact on nanoscale technologies," claimed Chih-Kang 'Ken' Shih, professor of physics, University of Texas at Austin.
The researcher states the performance and size of the photonic devices are greatly affected by the three-dimensional optical diffraction limit. In the present study paper, Shih and his colleagues reported “the first operation of a continuous-wave, low-threshold laser is below the 3-D diffraction limit. When fired, the nanolaser emits a green light. The laser is too small to be visible to the naked eye.”
Two alloys or semiconductors commonly used in LEDs are utilized for the construction of the device. A gallium nitride nanorod to some extent has been packed with indium gallium nitride in the piece of equipment. The nanorod is then positioned atop a thin insulating silicon layer that further covers a silver film, smooth at the atomic state. The “atomic smoothness" is the primary factor to creating photonic devices that doesn’t disperse or loose plasmons. “Atomically smooth plasmonic structures are highly desirable building blocks for applications with low loss of data,” asserted Shih.
Shangjr Gwo, a professor at National Tsing Hua University in Taiwain stated "Size mismatches between electronics and photonics have been a huge barrier to realize on-chip optical communications and computing systems." The new technology will help conjure up “on- chip” communication systems. The ‘On-chip' communication systems are to be used for Nanolasers wherein all the processes are enclosed on the chip itself. This means there will be no excess heat gain and no loss of information as the data is transferred from one chip to the other. This may lead to a change in the history of electronic devices.