Giant Rabi splitting in a bulk CuCl microcavity

Observation of strong exciton–photon coupling at temperatures up to 410 K

“…For the coupling strength V , we obtain a maximum value of about 51 meV (in PL) and 55 meV (in R) at 10 K, which is among the largest ones reported for inorganic microresonators. Only for CuCl-based microresonators was a larger coupling strength of about 80 meV maximum at 10 K reported [22]. The difference between the values found in the PL and R experiments can be attributed to the different formation processes of the excitons in these experiments that lead to a different exciton density and therefore different occupation of the polariton branches.…”

Control of exciton-photon interactions in CuCl microcavities

“…To analyze the experimental results of the incidence-angle dependence, the eigenenergies of the cavity polaritons are calculated using a phenomenological Hamiltonian given by the matrix 13 …”

“…A giant Rabi splitting energy that is ∼100 meV was realized in a CuCl bulk microcavity. 13 It is well known that the splitting energy ( LT ) between the longitudinal and the transverse excitons is a measure of the excitonic oscillator strength. The values of LT are 0.08, 14 1.0, 15 and 5.7 meV 16 for GaAs, GaN, and CuCl, respectively.…”

General mechanism of optical nonlinearity enhancement by cavity QED

“…CuCl has a biexciton with large binding energy ͑⌬ B Ϸ 30 meV͒, and recently a giant Rabi splitting of 2បg ϳ 100 meV has been experimentally observed in CuCl microcavity. 15 If the exciton-cavity system can be designed so as to realize ⌬ B Ϸ 2បg, the strong enhancement of optical nonlinearity due to the level anticrossing could be expected.…”