Observation of photon-mode decoupling in a strongly coupled multimode microcavity

We have fabricated organic semiconductor microcavities having an extended optical path-length (up to 2 mu m) that contain J-aggregates of a cyanine dye. These structures are studied using optical-reflectivity and are found to be characterized by a series of polaritonic modes. By changing the effective oscillator strength of the dye within the cavity, we evidence a transition from normal strong coupling in which the photon modes are coupled to one another via the excitonic transition of the molecular dye to a state in which photon-modes become decoupled. We use an eight-level modified Hamiltonian to describe the optical properties of the system and compare the distribution of the confined optical field in coupled and decoupled structures.

Automated summary

Researchers have fabricated organic semiconductor microcavities containing J-aggregates of a cyanine dye with an extended optical path-length, and studied the structures using optical-reflectivity, finding a transition from normal strong coupling to decoupled photon-modes by changing the effective oscillator strength within the cavity. Both coupled and decoupled structures were compared in terms of the distribution of the confined optical field using an eight-level modified Hamiltonian.