Ashraf Abdelrazig Rahamtallah Mohamed El Hassan

About me

Ashraf El Hassan is currently a researcher at Stockholm University. He earned his PhD from the Department of Physics (Fysikum) in September 2019 with a thesis titled "Multiparty Quantum Communication and fs-Laser-Written Integrated Photonic Circuits." He joined KTH Royal Institute of Technology as a postdoctoral researcher in April 2020, where he was later promoted to a researcher in April 2022. In August 2023, he returned to Fysikum.

Ashraf’s research lies at the intersection of applied physics and quantum technology, with a strong focus on quantum optics, quantum communication, and quantum sensing. He specialises in the development and characterisation of integrated optical circuits and fibre-based systems, leveraging advanced optical materials such as borosilicate glass, rubidium-doped potassium titanyl phosphate (RKTP), and lithium niobate on insulator (LNOI). His work explores femtosecond laser writing for three-dimensional photonic integration, nonlinear optics, and quantum photonic devices.

Ashraf has also made significant contributions to the emerging field of topological photonics. Notably, his work led to " the first experimental realization of corner states of light in photonic waveguides 1", marking a breakthrough in the implementation of topological photonic insulators.

1. Nature Photonicsvolume 13, pages697–700 (2019).