Negative refraction is demonstrated in one-dimensional (1D) dielectricphotonic crystals (PCs) at microwave frequencies. Focusing by plano-concavelens made of 1D PC due to negative refraction is also demonstrated. Thefrequency-dependent negative refractive indices, calculated from theexperimental data matches very well with those determined from band structurecalculations. The easy fabrication of one-dimensional photonic crystals mayopen the door for new applications.
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