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Strong exciton-photon coupling in a length tunable optical microcavity with -aggregate dye heterostructures
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic of the structure of the length tunable planar microcavities used in our experiments. The optical fiber, onto which the top mirror of the cavity is deposited, is mounted on an piezocontroller and this enables fine tuning of the cavity length . Also shown is the absorption spectrum of drop-cast films of the cyanine dye (Hayashibara NK2751), showing a peak from -aggregate formation. The chemical structure of the dye is shown as an inset.

Image of FIG. 2.
FIG. 2.

(a) Broadband transmission spectra as the cavity length, , is tuned. The dispersion of the resonances (solid lines) resolves an anticrossing behavior and Rabi splitting as the cavity modes are tuned across the absorption peak of the dye (dashed line). (b) Extracted peak positions for modes and (open circles). The dashed lines are a guide to eye, constructed using a standard theoretical model (lines).

Image of FIG. 3.
FIG. 3.

(a) Transfer-matrix simulations corresponding to , (i) with the silica spacer between dye and Au, (ii) in the absence of any spacer, and (iii) with an unfilled cavity. The bold line shows corresponding experimental transmittance data for case (i). (b) Rabi splitting values, derived from our transfer-matrix simulations, plotted against cavity length, as , for cavities with a silica spacer (hollow circles) and without a spacer (solid circles) between the dye and Au layers. The solid line (cavity with spacer) and dashed line (without spacer) are guides to the eye showing the relation. Experimental data points for both cavity types are also shown for comparison.

Image of FIG. 4.
FIG. 4.

Spatial optical-field intensity profiles (top mirror at ) corresponding to cases (i) and (ii) from Fig. 3(a), at the longer wavelength transmission peak, . The refractive index profile shows the position of Au and dye layers.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Strong exciton-photon coupling in a length tunable optical microcavity with J-aggregate dye heterostructures