<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Strong Light-Matter Coupling with N-Heteropolycycles"^^ . "In optical microcavities, strong light–matter coupling gives rise to exciton polaritons,\r\nhybrid light–matter states formed through the interaction between confined photons and\r\nmolecular excitons. While the criteria for achieving strong coupling are well established, the\r\ninfluence of molecular properties on lower polariton (LP) population and polariton-mediated\r\nenergy transfer remains underexplored.\r\nThis thesis investigates the potential of N-heteropolycycle-based systems as versatile\r\nplatforms for strong light–matter coupling in organic microcavities, aiming to deepen in-\r\nsight into exciton–polariton phenomena in molecular materials. Three primary objectives\r\nwere pursued. First, the viability of N-heteropolycycles for polariton formation was estab-\r\nlished using thioether-functionalized tetraazaperylene (TFTAP) derivatives (Butyl-, Benzyl-\r\n, and p-methoxybenzyl (PMB)-TFTAP) embedded in polystyrene matrices within metal-\r\nclad microcavities. Angle-resolved reflectivity and photoluminescence (PL) spectroscopy\r\nconfirmed polariton formation, with Rabi splitting energies ranging from 40 to 241 meV—\r\ncomparable to established organic systems. Polariton properties were tuned via cavity thick-\r\nness and emitter concentration, validating the collective and coherent nature of the coupling.\r\nSecond, polariton relaxation pathways in vibronically active tetraazacoronene (TAC) trimer\r\nsystems were explored, revealing detuning-dependent contributions from radiative pump-\r\ning (RP) and vibrationally assisted scattering (VAS). Spectral signatures indicated that reso-\r\nnance between states and vibronic or Raman-active modes enhances LP population, offering\r\nmechanistic insights relevant to low-threshold polariton lasing. Third, polariton-mediated\r\nenergy transfer was investigated in multilayer microcavities incorporating donor–acceptor\r\npairs (ATTO 680–IRDye and ATTO 655–IRDye). Systems with larger exciton energy off-\r\nsets exhibited enhanced acceptor emission due to modulation of polariton composition, es-\r\ntablishing energy offset as a key parameter for efficient energy transfer design."^^ . "2025" . . . . . . . "Parvathi"^^ . "Valsalan"^^ . "Parvathi Valsalan"^^ . . . . . . "Strong Light-Matter Coupling with N-Heteropolycycles (PDF)"^^ . . . "Parvathi Valsalan_Final_Thesis.pdf"^^ . . . "Strong Light-Matter Coupling with N-Heteropolycycles (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Strong Light-Matter Coupling with N-Heteropolycycles (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Strong Light-Matter Coupling with N-Heteropolycycles (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Strong Light-Matter Coupling with N-Heteropolycycles (Other)"^^ . . . . . . "small.jpg"^^ . . . "Strong Light-Matter Coupling with N-Heteropolycycles (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #36876 \n\nStrong Light-Matter Coupling with N-Heteropolycycles\n\n" . "text/html" . .