META Conference, META'12

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Sub-diffraction-limit resonators operating on the fundamental monopolar resonance: application to THz polaritons
Elodie Strupiechonski, Gangyi Xu, Manuel Brekenfeld, Aaron Maxwell Andrews, Yanko Todorov, Carlo Sirtori, Gottfried Strasser, Aloyse Degiron, Raffaele Colombelli

Last modified: 2012-01-06


We demonstrate semiconductor optical resonators with sub-wavelength dimensions in all three dimensions of space. The maximum confinement is obtained for resonators with a diameter of 13 µm, which operate at a wavelength of λ = 272 µm. This corresponds to a λeff/6 confinement, where λeff is the wavelength inside the material (or λ/20, if the free space wavelength is considered). These highly sub wavelength devices operate on the fundamental monopolar resonance, which corresponds to the fundamental oscillation mode of split-ring resonators and it is usually inactive in optical resonators. As a proof of principle for cavity quantum electrodynamics experiments, we apply these resonators to THz ISB intersubband polaritons.


THz; Optical resonators; microcavities