7 December 2001 Time-resolved transmission through a photonic crystal in the complete Fourier domain
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Abstract
Photonic crystals have recently received much attention for their interesting characteristics and potential applications in optical data handling. The top-down fabrication approach by lithographic techniques results in the best photonic bandgaps but is expensive. Self-assembly of spheres provides a simple approach towards the production of photonic bandgap materials. This bottom-up approach is being explored as a viable alternative towards devices. Photonic crystals have been prepared from the deposition of monodisperse latex spheres in water. A photonic bandgap in the near-IR is clearly observed. Tuning of the bandgap can be achieved by varying the sphere diameter. The time- resolved optical transmission of a femtosecond pulse through such colloidal crystals has been studied in the Fourier domain as a function of modulation frequency of the input light. The percent transmission and the phase shift for the transmitted light pulse versus the impinging light pulse have been determined as a function of incidence angle and optical wavelength. This percentage transmission and phase shift relate to the real and imaginary part or sine and cosine Fourier transform of the temporal profile of the transmitted light pulses in the time domain.
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Koen J. Clays, Koen J. Clays, Kurt Wostyn, Kurt Wostyn, Andre P. Persoons, Andre P. Persoons, } "Time-resolved transmission through a photonic crystal in the complete Fourier domain", Proc. SPIE 4461, Linear and Nonlinear Optics of Organic Materials, (7 December 2001); doi: 10.1117/12.449839; https://doi.org/10.1117/12.449839
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