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Transmission and reflection spectra of Bragg mirrors covered by layers of gold of thickness [(a) and (b)] and [(c) and (d)] taken at [(a) and (c)] and [(b) and (d)] . Circles and solid lines correspond to the measured reflection and transmission spectra, respectively; dashed and dotted lines show the calculated reflection and transmission spectra. Reflection spectra of the Bragg mirror uncovered by gold are shown by thin solid lines. is the full width at half maximum of the spectral feature associated with the TPP.
The energy of the TPP resonance detected in reflection and transmission spectra measured as a function of the angle of incidence of the exciting light for the DBR covered by a gold film (squares). The lines show the calculated TPP energies for the DBR covered by (solid), (dashed), and semi-infinite (dotted) gold layer thicknesses. The inset shows the extracted in-plane dispersion of the TPP state.
The dependence of the energy of the TPP on the etch depth of the top layer of GaAs of the BR. The solid line shows the calculated dependence, while squares show the experimental results. A dotted horizontal line shows the position of the center of the photonic band gap of the BR.
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