Abstract
Optoelectronic-compatible heterostructures are fabricated from layered inorganic-organic multiple quantum wells (IO-MQW) of Cyclohexenyl ethyl ammonium lead iodide, (C(6)H(9)C(2)H(4)NH(3))(2)PbI(4) (CHPI). These hybrids possess strongly-resonant optical features, are thermally stable and compatible with hybrid photonics assembly. Room-temperature strong-coupling is observed when these hybrids are straightforwardly embedded in metal-air (M-A) and metal-metal (M-M) low-Q microcavities, due to the large oscillator strength of these IO-MQWs. The strength of the Rabi splitting is 130 meV for M-A and 160 meV for M-M cavities. These values are significantly higher than for J-aggregates in all-metal microcavities of similar length. These experimental results are in good agreement with transfer matrix simulations based on resonant excitons. Incorporating exciton-switching hybrids allows active control of the strong-coupling parameters by temperature, suggesting new device applications.
Highlights
Achieving better control of the spontaneous emission in optoelectronic devices has been a major focus of research in photonics structures, using microcavities [1,2,3,4]
Optoelectronic-compatible heterostructures are fabricated from layered inorganic-organic multiple quantum wells (IO-MQW) of Cyclohexenyl ethyl ammonium lead iodide, (C6H9C2H4NH3)2PbI4 (CHPI)
Room-temperature strong-coupling is observed when these hybrids are straightforwardly embedded in metal-air (M-A) and metal-metal (M-M) low-Q microcavities, due to the large oscillator strength of these IO-MQWs
Summary
Achieving better control of the spontaneous emission in optoelectronic devices has been a major focus of research in photonics structures, using microcavities [1,2,3,4]. In contrast for larger light-matter coupling, if exciton and photon lifetimes are long in comparison to their interaction time, they mix in a strong coupling regime in which new coupled eigenstates called polaritons emerge [7, 8] In this regime, the microcavity polariton dispersion E(k) consists of anti-crossing branches separated in energy by the Rabi splitting, Ω, which defines the coupling strength. Recent progress in the structural engineering of ‘naturally’ self-assembled 2D layered inorganicorganic multiple quantum wells (IO-MQW) show new possibilities for optoelectronics devices with tremendous advantage over the conventional organics [17,18,19]. We further demonstrate the tunability in these strongly-coupled microcavities by using a similar hybrid, C12PI, which allows switchable excitons
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