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Scheme of the microcavity structure (a) and molecular structure of the employed conjugated polymer (b).
Transmission spectrum of the complete microcavity (continuous line, vertical scale on the left) and absorption spectrum of a neat copolymer thin film (dotted line, vertical scale on the right). The arrow indicates the resonant mode within the microcavity stop band.
Reflectance (a, continuous lines) and PL (b, empty-dots curves) spectra of the microcavity at different detection angles. (From bottom to top: 35°, 50°, 55°, and 65°.) The arrows in (a) indicate the mode splitting upon increasing viewing angle. In (b), we superimposed the best fit to experimental data in the splitting region (single curves: Dotted lines, superposition: Continuous line).
Angular dependences of the resonance frequencies, extracted by PL measurements. Full squares: Main peak , empty circles: TE peak, empty triangles: TM peak . Dotted lines represent the fitting curves calculated according to Eq. (1). The inset shows the reflectance spectra, from top to bottom: with unpolarized light, TE, and TM polarization. (Detection angle: 50°.)
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