2D photonic crystals with absorption

Summary form only given. Photonic crystals are nanostructured materials that possess a periodic modulation of the dielectric constant. We have fabricated two-dimensional (2D) triangular photonic crystals in which one of the elements is a phthalocyanine (Pc) dye. These Pc´s have a wavelength dependent absorption and large nonlinear absorption and nonlinear refraction coefficients. Thus, in our new photonic crystal materials, there is a wavelength and fluence dependent modulation in both the real and imaginary part of the dielectric constant. We investigate the optical properties of such photonic crystal materials and their potential for optical limiting applications.