Special Presentation: Darius Bunandar

    Tuesday, November 28, 2017 - 10:00am
    Franken Conference Room (Meinel 821)

    Quantum cryptography with silicon photonic integrated devices


    Secure communication against any possible eavesdropper is important in today's Internet. Quantum key distribution (QKD), along with the one-time pad cryptosystem, provides a quantum-secure way for two distant parties to communicate with composable security. It has recently become clear that a wide-spread utilization of QKD warrants miniaturization and an operation speed comparable to current Internet communications. The silicon photonics platform allows for the integration of multiple high-speed photonic operations into a single circuit. Here, we present the first intercity field demonstrations of QKD with silicon photonics as well as the first chip-scale integrated wavelength-division multiplexed QKD operations. Our results demonstrate how silicon photonics—supported by the currently existing CMOS technology—can pave the way for a high-speed metropolitan-scale quantum communication network.

    Speaker Bio(s): 

    Darius received his BS in Physics and Mechanical Engineering from the University of Texas at Austin in 2013. While at UT Austin, he worked on finding the event horizon of black holes under the guidance of Prof. Richard Matzner. In addition, along with the SXS Caltech-Cornell collaboration, he developed a software to visualize images that have been distorted by binary black holes. He also spent a year performing large-scale blast experiments and simulating explosions at the Baker Engineering and Risk Consultants, Inc.. After enrolling in the Physics PhD program at MIT, his research interests have been shifted to the theory and practical implementations of quantum communication and computation.