IIT Kharagpur's Breakthrough with Zero-Threshold Raman Laser

Researchers at IIT Kharagpur develop a pioneering zero-threshold Raman laser with transformative potential in nanoscale laser technology and quantum communications. The innovation leverages Raman scattering for efficient light generation. Published in Physical Review B, it heralds new directions in semiconductor quantum optics and future quantum technologies.

In a groundbreaking achievement, researchers at IIT Kharagpur have developed a zero-threshold Raman laser, poised to transform nanoscale laser technology and quantum communications. The innovation is detailed in a statement by the institute, emphasizing the laser's high efficiency due to its reliance on the Raman scattering effect.

Unlike traditional lasers, this novel Raman laser shifts the frequency of a pump laser to previously unreachable spectrums. Its ability to convert quantum light sources while maintaining their quantum properties is crucial for advancing quantum communication technologies, a significant milestone in laser research.

Led by Dr. Sajal Dhara, the research team revealed that creating an optical microcavity with highly reflective mirrors and a thin semiconductor layer was key to this advancement. Published in 'Physical Review B', this work paves the way for future exploration in semiconductor quantum optics, potentially unveiling phenomena vital for quantum tech development.

(With inputs from agencies.)