Research

Rare Earth Photonics

Developing scalable quantum memories and other optical processors that operate near the telecommunication wavelengths is a significant milestone for future quantum communication systems. High optical quality factors as well as strong light confinement can be achieved on-chip by fabricating microscopic photonic resonators. Placing atoms in the vicinity of the optical mode of miniaturized resonators can results in strong light-atom interactions important for coherent optical information processing and storage. In nano-cavities, the enhanced light-atom coupling can reach the regime of strong cavity quantum electrodynamic, where a single photon can strongly and coherently interact with a single atom. Applications of such unique interaction ranges from photonic memories for scalable secure communication to logic gates for quantum photonic computation.

In HiQP Lab, we are interested in developing solid-state photonic systems that are scalable and also compatible with the current telecommunication technology. We develop nano-photonic devices integrated with rare-earth ions and study strong quantum interactions of optical information with such ions.

We also use precision ion implantation to design atomic geometries in silicon micro-resonators and study the light-atom interaction influced by such geometry.

Moreover, our group works to create hetrogeneous photonic structures consist of rare earth crystals directly integrated with silicon photonics for quantum storage applications.

Related publications:

• Arindam Nandi, Haechan An, Mahdi Hosseini, “A Coherent Atomic Mirror Formed by Randomly Distributed Ions Inside a Crystal", Opt. Letts. 46, 1880 (2021).

• Dongmin Pak, Haechan An, Arindam Nandi, Xiaodong Jiang, Yi Xuan, Mahdi Hosseini, “Ytterbium-implanted photonic resonators based on thin film lithium niobate", J. of Appl. Phys. 128, 084302 (2020).

• Haechan An, Zechuan Yin, Chandler Mitchell, Abbas Semnani, Amir Hajrasouliha, Mahdi Hosseini "Nanodiamond ensemble based temperature measurement in living cells and its limitations" Measur. Sci. and Tech. (2020).

• Arindam Nandi, Xiaodong Jiang, Dongmin Pak, Daniel Perry, Kyunghun Han, Edward S Bielejec, Yi Xuan, Mahdi Hosseini, “Controlling light emission by engineering atomic geometries in silicon photonics” Opt. Lett. 45 (7) 1631-1634 (2020).

• Xiaodong Jiang, Dongmin Pak, Arindam Nandi, Yi Xuan, Mahdi Hosseini, "Rare Earth-implanted Lithium Niobate: Properties and On-chip Integration" Appl. Phys. Letts. 115, 071104 (2019).