Dr. Alex Krasnok


Hybrid photonic nanostructures

          Hybrid photonic nanostructures are a combination of resonant metallic nanoparticles and high-index dielectric nanoparticles. These hybrids are considered by many in the field to be the primary foundational element of next-generation optical computers due to their ability to simultaneously control both electromagnetic fields and light at the nanoscale. These nanostructures allow for beam steering, optical switching, generation of high harmonics, directional emission, engineering of the local density of states, magneto-optical activity, ultrahigh optical absorption, room-temperature laser emission, and enhanced photophysical effects. However, the fabrication of these amazing nanostructures has been viewed for some time as an incredibly arduous task. Through my research, I have addressed this issue. I have proposed a novel fabrication method, which centers around the application of femtosecond laser melting of asymmetrical hybrid nanoparticles created via lithography. My method is an important innovation because it allows for selective reshaping of the metal components without altering the dielectric ones. This method is highly precise and therefore allows the unique opportunity for the creation of asymmetrical hybrid nanostructures as well as a manipulation of the optical properties of each. My work in this area has therefore laid the groundwork for the large-scale fabrication of these nanoparticle devices.