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Title

Three-dimensional horizontal circular spiral photonic crystals with stop gaps below 1 mu m

Author(s)

Seet, Kock Khuen;  Mizeikis, Vygantas;  Juodkazis, Saulius;  Misawa, Hiroaki

Abstract

Three-dimensional photonic crystals with a circular spiral architecture were fabricated by direct laser writing (DLW) in a photoresist. DLW was performed with a laser beam having the direction of propagation and elongation of the ellipsoidal focal region perpendicular to the spirals’ orientation. This allowed the reduction of the turning period of the spirals while avoiding the overlap between their adjacent turns. Consequently, optical transmission and reflection spectra of the fabricated samples revealed multiple photonic stop gaps whose shortest wavelength was 0.88 μm, the lowest observed so far in spiral structures. These results were qualitatively reproduced by finite-difference time-domain simulations. This fabrication scheme can be useful for DLW of structures where photonic stop gaps along particular directions, rather than complete photonic band gaps, are required.

Publication type

Journal article

Source

Applied Physics Letters, Vol. 88, no. 22 (May 2006), paper no. 221101

Publication year

2006

FOR Code(s)

01 Mathematical Sciences;  02 Physical Sciences;  09 Engineering

Keyword(s)

Circular spiral photonic crystals;  Direct laser writing;  Energy gap;  Lasers;  Light propagation;  Light transmission;  Photonic band gaps;  Photonic stop gaps;  Photons

Publisher

American Institute of Physics

ISSN

0003-6951

Publisher URL

http://dx.doi.org/10.1063/1.2207841

Copyright

Copyright © 2006 American Institute of Physics. Published version of this paper reproduced here in accordance with the copyright policy of the publisher.

Full text

Peer reviewed