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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 29, Iss. 13 — Jul. 1, 2011
  • pp: 1937–1943

Short-Wavelength Light Propagation in Graded Photonic Crystals

Eric Cassan, Khanh-Van Do, Charles Caer, Delphine Marris-Morini, and Laurent Vivien

Journal of Lightwave Technology, Vol. 29, Issue 13, pp. 1937-1943 (2011)


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Abstract

Control of electromagnetic fields using graded photonic crystals (GPhCs) is explored using equations of Hamiltonian optics. Contrary to previous works devoted to the long-wavelength regime enabling homogenization of photonic metamaterials, attention is paid to short-wavelength light propagation for the possible use of dispersive phenomena and light path reconfiguring with wavelength. An analytical description of the dispersion diagram of a square PhCs is extracted using plane wave expansion calculations, making possible the description of arbitrary light paths in 2-D GPhC structures and fast optimization to find the conditions suited to make light follow prescribed paths. The validity of the approach is validated by comparison with finite-difference time-domain simulation. For purpose and illustration, a wavelength demultiplexing structure with four channels and an overall surface of 60 µm x $60 µm is proposed. The described methodology is applicable to the generalized 2-D chirp of PhC lattice or filling ratio parameters for electromagnetic field shaping.

© 2011 IEEE

Citation
Eric Cassan, Khanh-Van Do, Charles Caer, Delphine Marris-Morini, and Laurent Vivien, "Short-Wavelength Light Propagation in Graded Photonic Crystals," J. Lightwave Technol. 29, 1937-1943 (2011)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-29-13-1937

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