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The theory describing the far-field emission from a dipole source embeddedinside a chiral sculptured thin film (CSTF), based on a spectral Green functionformalism, was further developed to allow for infiltration of the void regionsof the CSTF by a fluid. In doing so, the extended Bruggeman homogenizationformalism--which accommodates constituent particles that are small compared towavelength but not vanishingly small--was used to estimate the relativepermittivity parameters of the infiltrated CSTF. For a numerical example, wefound that left circularly polarized (LCP) light was preferentially emittedthrough one face of the CSTF while right circularly polarized (RCP) light waspreferentially emitted through the opposite face, at wavelengths within theBragg regime. The centre wavelength for the preferential emission of LCP/RCPlight was red shifted as the refractive index of the infiltrating fluidincreased from unity, and this red shift was accentuated when the size of theconstituent particles in our homogenization model was increased. Also, thebandwidth of the preferential LCP/RCP emission regime decreased as therefractive index of the infiltrating fluid increased from unity.

On chemiluminescent emission from an infiltrated chiral sculptured thin film