Spatial filtering using dielectric photonic crystals at beam-type excitation

Spatial filtering is demonstrated at beam-type excitations by utilizing finite thickness slabs of two-dimensional dielectric photonic crystals (PCs) showing exotic Fabry–Perot resonances that are preserved over a wide range of variation of the incidence angle. Bandstop and dual-bandpass filtering effects are illustrated theoretically and the corresponding filters are validated in the microwave experiments by using square-lattice PCs. It is shown that the basic transmission features that were observed earlier for a plane-wave illumination are also recognizable at beam-type excitations. The proposed spatial filtering mechanism exhibits directional beaming. The desired widths and the locations of the passbands and stopbands are attainable in the angle domain with a proper choice of the operating frequency for the given excitation characteristics.

[1]  R. McPhedran,et al.  Highly efficient wide-angle transmission into uniform rod-type photonic crystals , 2005 .

[2]  C. Soukoulis,et al.  Subwavelength resolution in a two-dimensional photonic-crystal-based superlens. , 2003, Physical review letters.

[3]  R. Mittra,et al.  Application of electromagnetic bandgap (EBG) superstrates with controllable defects for a class of patch antennas as spatial angular filters , 2005, IEEE Transactions on Antennas and Propagation.

[4]  I. Bulu,et al.  Beaming of light and enhanced transmission via surface modes of photonic crystals. , 2005, Optics letters.

[5]  C. Soukoulis,et al.  Highly directional emission from photonic crystal waveguides of subwavelength width. , 2004, Physical review letters.

[6]  Kestutis Staliunas,et al.  Spatial filtering of light by chirped photonic crystals , 2009 .

[7]  P. Chavel,et al.  Optical spatial frequency filtering using interferences , 1984 .

[8]  E. Ozbay,et al.  Frequency dependent steering with backward leaky waves via photonic crystal interface layer. , 2009, Optics express.

[9]  I. Bulu,et al.  Highly directional enhanced radiation from sources embedded inside three-dimensional photonic crystals. , 2005, Optics express.

[10]  Ekmel Ozbay,et al.  Double‐etch geometry for millimeter‐wave photonic band‐gap crystals , 1994 .

[11]  Steven G. Johnson,et al.  All-angle negative refraction without negative effective index , 2002 .

[12]  Esteban Moreno,et al.  Enhanced transmission and beaming of light via photonic crystal surface modes , 2004 .

[13]  R. Piestun,et al.  Total external reflection from metamaterials with ultralow refractive index , 2003 .

[14]  C. Soukoulis,et al.  Electromagnetic waves: Negative refraction by photonic crystals , 2003, Nature.

[15]  Ekmel Ozbay,et al.  Toward photonic crystal based spatial filters with wide angle ranges of total transmission , 2009 .

[16]  Constantine A. Balanis,et al.  Antenna Theory: Analysis and Design , 1982 .

[17]  S. Wen,et al.  Polarization-independent low-pass spatial filters based on one-dimensional photonic crystals containing negative-index materials , 2009 .

[18]  Yuri S. Kivshar,et al.  Engineering of directional emission from photonic-crystal waveguides , 2004, physics/0407127.

[19]  G. Eleftheriades,et al.  Resonant modes in continuous metallic grids over ground and related spatial-filtering applications , 2006 .

[20]  R. Rabady,et al.  Experimental characterization of simultaneous spatial and spectral filtering by an optical resonant filter. , 2004, Optics letters.

[21]  Ekmel Ozbay,et al.  Spatial and spatial-frequency filtering using one-dimensional graded-index lattices with defects , 2009 .

[22]  Ivan Moreno,et al.  Thin-film spatial filters. , 2005, Optics letters.

[23]  E. Ozbay,et al.  Resonant cavity-enhanced detectors embedded in photonic crystals , 1996, Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference.

[24]  David R. Smith,et al.  Spatial filtering using media with indefinite permittivity and permeability tensors , 2003 .

[25]  Kazuaki Sakoda,et al.  Optical Properties of Photonic Crystals , 2001 .

[26]  Weiqiang Ding,et al.  Efficient beaming from photonic crystal waveguides via self-collimation effect , 2006 .

[27]  M. Teich,et al.  Fundamentals of Photonics , 1991 .

[28]  Anne Sentenac,et al.  Angular tolerant resonant grating filters under oblique incidence. , 2005, Journal of the Optical Society of America. A, Optics, image science, and vision.

[29]  Sunkyu Yu,et al.  Directional emission from photonic crystal waveguide terminations using particle swarm optimization , 2010 .

[30]  M. Sigalas,et al.  Laser-micromachined millimeter-wave photonic band-gap cavity structures , 1995 .

[31]  Pekka Ikonen,et al.  Canalization of subwavelength images by electromagnetic crystals , 2005 .