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(a) Refractive index profile of multiple-defect PC. The layer thicknesses were monitored optically with accuracy. The thickness of the high index quarter-wave layers are , while the low index quarter-wave layers are thick. The three one-wave thick high index layers are thick. (b) Theoretical transmission spectrum of the PC structure (thin solid line) together with the experimental spectrum of the fabricated samples (crossed open circles).
(a) Theoretical transmission spectrum of the PC structure (thin solid line) and calculated group delay time (dashed line); the negative (A,C) and positive (B,D) dispersion region are highlighted. (b) Experimental transmission spectra of the fabricated sample as a function of the incidence angle. The vertical line indicates the peak wavelength of the laser source.
Measured pulse duration of the laser as a function of the incidence angle for simple substrates (squares) and for (circles). The experimental data are compared with the numerical calculation of the pulse duration (solid line). A dashed line highlights the original pulse duration. The accuracy of the measurements is in the range of .
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