Andrea Di Falco

Perfect secrecy cryptography in photonic chips

We are very happy to share our new paper where we demonstrate that it is possible to create a perfect secrecy cryptographic protocol in classical channels. The system uses time varying integrated chips based on silicon on insulator technology and implements a working version of the One Time Pad protocol. The work was the result of the collaboration between our group, King Abdullah University of Science and Technology (KAUST) and the Center for Unconventional Processes of Sciences (CUP Sciences). You can access here the press release from the University of St Andrews.  

The Nonlinear Optical Memory Effect

Light propagating in random media produces characteristic speckle patterns, which remain correlated for small perturbations of the parameters of the incoming beam, including e.g. its angle and position. This behaviour is known as memory effect. In a paper published in Optics Letters, fruit of the collaboration of our group with Dr Tom Vettenburg (University of Dundee) and Prof. Claudio Conti (CNR, Italy), we generalise the memory effect to the case of light propagating in random nonlinear media. In particular, in a series of pump-probe experiments, we quantify the nonlinear memory effect produced by the opto-thermal response of silica aerogel. In this work, the memory effect… Read More »The Nonlinear Optical Memory Effect


We are excited to announce the beginning of Dr Di Falco’s ERC consolidator grant AMPHIBIANS.  The project aims to introduce a new biophotonic platform based on the all optical manipulation of flexible photonic metasurfaces. These artificial two-dimensional materials have virtually arbitrary photonic responses and have an intrinsic exceptional mechanical stability. This cross-disciplinary project, bridging photonics, material sciences and biology, will enable the adoption of the most modern and advanced photonic designs in microfluidic environments, with transformative benefits for microscopy and biophotonic applications at the interface of molecular and cell biology. Please visit our job openings page for an update list of available positions.  

We’re recruiting    

The Synthetic Optics groups is recruiting a postdoc to work on the ERC grant AMPHIBIANS. The Synthetic Optics group is recruiting a postdoc researcher to work on the ERC grant AMPHIBIANS. The Research Fellow will be required to design and fabricate photonic metasurfaces for optomechanical and biophotonics applications. The applicant should have demonstrated experience in the design or the fabrication of photonic metasurfaces, preferably in the visible range. A strong candidate will also have demonstrated or clear interest in acquiring expertise on optomechanical and/or biophotonics applications. It is expected that the successful applicant for the advertised position will take these ideas further. The initial contract is… Read More »We’re recruiting