Dynamic Tuning of Plasmon–Exciton Coupling in Arrays of Nanodisk–J‐aggregate Complexes

Dynamic tuning of plasmon–exciton resonant coupling in arrays of nanodisk–J-aggregate complexes is demonstrated. The angle-resolved spectra of an array of bare gold nanodisks exhibit continuous shifting of localized surface plasmon resonance. This characteristic enables the production of real-time, controllable spectral overlap between molecular resonance and plasmonic resonance. The resonant interaction strength as a function of spectral overlap is explored and the coupling strength changes with the incident angle of a probe light, in accord with simulations based on coupled dipole approximation method.