• The pioneering concept of ‘active plasmonics’ for active control of SPP waves using structural (phase) transformations. In this context, I presented the first microscale plasmonic switch, making an impact reflected in 300+ citations. Furthermore, I experimentally demonstrated the proposed concept and introduced a novel Ga/Al nano-composite nonlinear material.

  • The idea and numerical demonstration of a concept for the smallest integrated nanophotonic modulator to date, having a size of just 100 nm and utilising a drastic nanoscale electro-optic effect in degenerate semiconductors. It redefines the boundaries of optoelectronics bringing it to the nanoscale and creates a prospective backbone technology for future fully-functional hybrid electronic/photonic devices.

  • Development of extremely versatile active plasmonic circuitry on the basis of dielectric-loaded SPP waveguides. This work has had a major impact in the field of nano-optics, already generating 1000+ citations.

  • Innovative concept of SPP mode amplification via electric injection in metal-semiconductor heterostructures, opening a prospect for on-chip subwavelength data networks with unmatched bandwidth. Furthermore, on its basis I have demonstrated the design of the first on-chip electrically-pumped coherent SPP source with subwavelength dimensions.

  • Development of a double-modulation pump-probe technique to perform ultra-sensitive optical gain measurements. The technique allowed me to demonstrate all-plasmonic modulation of co-propagating SPP signals at the interface with an Er-based gain medium. Moreover, for the first time I have developed an analytical theory of this process.

  • Implementation of a hydrodynamic time-domain numerical model was reviewed for coherent interactions of free-carrier plasma in the metallic nanostructured materials of an arbitrary geometry with an optical pulse of an arbitrary temporal profile, without any approximations. The approach allows to address the phenomena of multiple and resonantly-enhanced harmonic generation as well as reveals the interplay between the nonlocal effects and topology of a nanostructure.

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