Hybrid optical coating design for omnidirectional antireflection purposes

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Hybrid optical coating design for omnidirectional antireflection purposes
( D, Y# J+ P6 P: v3 ~8 KVesna Janicki1,2, SteffenWilbrandt3, OlafStenzel1, DieterG¨abler1,
Norbert Kaiser1, Alexander Tikhonravov4, Mikhail Trubetskov4
3 {5 g! j7 x6 q# {  y/ Oand Tatiana Amotchkina4
1 Fraunhofer Institut f¨ur Angewandte Optik und Feinmechanik, Optical Coatings Department,
Albert-Einstein-Straße 7, 07745 Jena, Germany
2 Ruder Boˇskovi´c Institute, Division of Laser and Atomic Research and Development,
Bijeniˇcka cesta 54, 10000 Zagreb, Croatia
3 Friedrich-Schiller-Universit¨at Jena, Institut f¨ur Angewandte Physik,
Albert-Einstein-Straße 15, 07745 Jena, Germany
/ S( ^+ S- U* a. R; z4 Moscow State University, Research Computing Centre, Leninskie Gory, 119992,Moscow,
Russia
Received 6 March 2005, accepted for publication 20 May 2005
  G4 {$ J1 r1 w. J( @Published 12 July 2005
( v% Z( }* s! C0 U( m4 |) Z8 @% t5 }  lOnline at stacks.iop.org/JOptA/7/L9
Abstract
# h4 r; s! Z) s- @+ ?We present a new design for an omnidirectional antireflection coating for the
3 r% D8 F3 ]3 ]" u/ ]# xvisible spectral range. In contrast to classical designs, it combines
5 V" ~' k( Z0 o0 {7 J3 `1 x5 v0 P$ jhomogeneous layers and linear gradient index layers into one hybrid design
with a full thickness of approximately 500 nm. The coating may be
practically produced based on silicon dioxide as low index material and
2 R! y  o8 L4 {9 q" Iniobium pentoxide as high index material, while intermediate indices may
be obtained from corresponding mixtures.
Keywords: antireflective coating, hybrid coating, rugate, gradient index,
omnidirectional

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