Researchers at the Indian Institute of Science (IISc) have made a significant breakthrough in controlling light at the nanoscale, paving the way for advancements in quantum communication, data encryption, and next-generation photonic devices.
By integrating two-dimensional semiconductor colloidal quantum wells (CQWs) with dielectric metasurface resonators (MSRs), the team achieved unprecedented control over light emission. This innovative approach resulted in a remarkable 12-fold increase in brightness and a 97% reduction in the spectral linewidth of the emitted light, ensuring exceptional purity.
“This groundbreaking research demonstrates the immense potential of integrating nanoscale materials like CQWs with advanced photonic structures,” said Prof. Jaydeep K. Basu from IISc’s Department of Physics. “This breakthrough opens new avenues for developing highly efficient and compact quantum devices with applications in secure communication and advanced sensing technologies.”
The study, published in the prestigious journal Advanced Optical Materials, showcases the integration of Cadmium Selenide (CdSe)-based CQWs with a guided mode MSR fabricated on a silicon nitride (SiN) platform. The MSR, featuring a precise arrangement of holes, effectively tunes the light emission properties of CQWs.
This advancement has significant implications for the development of:
- Quantum Communication: Enabling secure and high-speed data transmission.
- Data Encryption: Enhancing data security through quantum cryptography.
- Photonic Devices: Creating more efficient and compact optical devices for various applications.
The IISc team, led by Prof. Basu, in collaboration with Prof. Shankar Kumar Selvaraja from the Centre for Nano Science and Engineering (CeNSE) and Prof. Girish S. Agarwal at Texas A&M University, continues to push the boundaries of quantum photonics with this groundbreaking research.
