An Exciton-Polariton Fano Resonance Driven by Second Harmonic Generation
arXiv:1903.01770 · doi:10.1103/PhysRevLett.118.063602
Abstract
Angle-resolved second harmonic generation (SHG) spectra of ZnO microwires show characteristic Fano resonances in the spectral vicinity of exciton-polariton modes. The output SHG spectra after SHG interacting with exciton polariton shows a resonant enhancement peak accompanied by a suppression dip originating from the constructive and destructive interference respectively. It is demonstrated that the Fano line shape, and thus the Fano asymmetry parameter q, can be tuned by the phase-shift of the two channels. The phase-dependent q was calculated and the model describes our experimental results well. In particular, the phase-to-q relation unveil the crucial information about the dynamics of the system, e.g., defining the line shape of output SHG spectra in a superposition of quantum states.
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- Weak value amplification using asymmetric spectral response of Fano resonance as a natural pointer
- Analytical solution of the disordered Tavis-Cummings model and its Fano resonances
- Mueller matrix spectroscopy of Fano resonance in Plasmonic Oligomers
- Ray dynamics of whispering-gallery modes in curved space