slab photonic crystal (rus. фотонный кристалл, планарный otherwise пленочный фотонный кристалл abbr., ПФК) — 2D photonic crystal based on the planar optical waveguide with the structure where the refraction index changes periodically along two directions in the waveguide plane.


Typically, a planar photonic crystal (PC) is a transparent semiconductor or dielectric film located on a substrate with a grid of periodically arranged air-filled holes. In planar PCs, the film acts as a planar waveguide, limiting the light waves perpendicularly to the film plane. Propagation of light waves in the film plane can be controlled by a two-dimensional structure, which greatly enhances the traditional integrated optics. In particular, planar PCs with photonic band gaps can have optical waveguides, cavities, polarisers, spectral filters and multiplexers, lasers, optical amplifiers, wavelength converters, optical processors and other optical devices.

Planar PCs are a new significant step in the photonic integrated circuits technology development since they a large number of optical devices are produced on a single chip. Photonic crystal heterostructures (PCH) significantly expand the functionality of planar PCs which are the basis for making channel waveguides, high-Q cavities, selectors, multiplexers, polarisers and other devices. It is important to note that the periodic structures in the film plane canalise or localisse the light, but also they provide effective management of the dispersion, nonlinear, electro-optical and acousto-optical properties of the waveguides.

Modified photonic integrated circuit technologies are used in the production of planar PCs, which facilitates combining 2D PC devices with photonic integrated circuit (PIC) and fibre optics elements.


  • Nanii Oleg E.
  • Pavlova Elena G.


  1. Istrate E., Sargent E.H. Photonic crystal heterostructures and interfaces // Reviews of Modern Physics. 2006. V. 78. P. 455–481.
  2. Noda S. Photonic crystal technologies: Experimen // Optical Fiber Telecommunications / Ed. by I. P. Kaminow, T. Li, A. E. Willner. — Academic Press, 2008. P. 455–483.

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