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Strong Coupling of Molecular and Mid-Infrared Perfect Absorber Resonances

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4 Author(s)
Mason, J.A. ; Dept. of Phys. & Appl. Phys., UMass Lowell, Lowell, MA, USA ; Allen, G. ; Podolskiy, V.A. ; Wasserman, D.

We demonstrate strong coupling between a mid-infrared perfect absorber and a molecular absorption resonance embedded in our absorber structure. Anti-crossing behavior is demonstrated as the perfect absorber resonance is tuned through the molecular absorption line, both experimentally and numerically, and is described analytically using a simple coupled harmonic oscillator model. Excellent agreement between experimental, numerical, and analytical results are shown. Such devices offer potential for mid-infrared sensing systems and actively tunable perfect absorber devices.

Published in:

Photonics Technology Letters, IEEE  (Volume:24 ,  Issue: 1 )