Modern photonics and plasmonics belong to the most dynamically evolving branches of contemporary applied physics with strong impact on a broad range of human activities. This joint project of the Czech Technical University in Prague, Institute of Photonics and Electronics CAS, and Brno University of Technology is primarily focused at the theoretical analysis and numerical simulations of unconventional phenomena and novel advanced functionalities of subwavelength (SW) photonic and plasmonic structures. The main areas of research addressed in this project include (1) subwavelength guided-wave structures with periodic and quasiperiodic modulation, (2) properties of active and nonlinear subwavelength structures, including PT-symmetric systems with gain / loss modulation, (3) nonlocal plasmonic processes and resonances, and (4) development of physical models and implementation of up-to-date specific advanced numerical techniques, required for solving previous goals. Strong participation of undergraduate and graduate students and application of results in education is also envisaged.