New Zero-Threshold Raman Laser Holds Promise for Advanced Quantum Technologies
In a ground-breaking discovery, researchers from IIT Kharagpur, led by Dr. Sajal Dhara, have developed a zero-threshold Raman laser that could revolutionize nanoscale laser technology with immense potential for quantum communications. This innovative development marks a significant milestone in the field of Laser technology.
The research team’s work, which has been recently published as a letter in the prestigious journal Physical Review B under the title “Zero-threshold PT-symmetric Polariton Raman Laser,” was funded by Science and Engineering Research Board (CRG) and Ministry of Education (Strengthening Teaching-Learning and Results for States #STARS), Government of India.
Unlike conventional lasers, this Raman laser operates without a threshold power, enhancing the ability to shift the frequency of a pump laser to ranges previously unattainable through traditional methods. The key innovation of this zero-threshold Raman laser is its capacity to convert the frequency of quantum light sources while preserving their inherent quantum nature, a crucial factor for the future of quantum communication technologies.
A significant breakthrough has been attained through the creation of an optical microcavity utilizing highly reflective mirrors, within which a layer of semiconductor, only a few atomic layers thick, is sandwiched. The key optical property of the anisotropic semiconductor employed in this innovative work is akin to the amplification of polarized light, a concept first explored by the esteemed physicist S. Pancharatnam, renowned for his ground-breaking discovery of the Pancharatnam Phase, a foundational contribution to the field.
Dr. Dhara’s team posits that their work on the zero-threshold Raman laser offers new insights into light-matter interactions, which could pave the way for ground-breaking research in semiconductor quantum optics. This advancement holds the potential to uncover remarkable phenomena that may play a pivotal role in shaping the future of quantum technologies.
Inputs from: Prof. Sajal Dhara, Department of Physics, IIT Kharagpur
Email: sajaldhara@phy.iitkgp.ac.in
Edited By : Poulami Mondal, Digital & Creative Media Executive (Creative Writer)
Email: poulami.mondal@iitkgp.ac.in, media@iitkgp.ac.in, Ph. No.: +91-3222-282007
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