Hybrid optical coating design for omnidirectional antireflection purposes

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Hybrid optical coating design for omnidirectional antireflection purposes
Vesna Janicki1,2, SteffenWilbrandt3, OlafStenzel1, DieterG¨abler1,
Norbert Kaiser1, Alexander Tikhonravov4, Mikhail Trubetskov4
( O) D# d8 s. l- y6 oand Tatiana Amotchkina4
% _$ }, w) d$ {& J0 C+ v2 t1 Fraunhofer Institut f¨ur Angewandte Optik und Feinmechanik, Optical Coatings Department,
# s9 n3 @% Y) R' |5 IAlbert-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
9 x6 f" W& D7 v0 c/ s3 Friedrich-Schiller-Universit¨at Jena, Institut f¨ur Angewandte Physik,
Albert-Einstein-Straße 15, 07745 Jena, Germany
4 Moscow State University, Research Computing Centre, Leninskie Gory, 119992,Moscow,
; l0 `4 H" F$ |- n6 fRussia
Received 6 March 2005, accepted for publication 20 May 2005
2 o" l6 Z' Y5 M! \+ v9 y9 ^8 EPublished 12 July 2005
Online at stacks.iop.org/JOptA/7/L9
( \( p) K7 y  yAbstract
We present a new design for an omnidirectional antireflection coating for the
# E% p1 L: R" ?5 r' ~% Yvisible spectral range. In contrast to classical designs, it combines
homogeneous layers and linear gradient index layers into one hybrid design
! N) a( X# Q, U7 ~0 V: k! _with a full thickness of approximately 500 nm. The coating may be
practically produced based on silicon dioxide as low index material and
niobium pentoxide as high index material, while intermediate indices may
# G, c/ U  B4 ?1 S9 f3 lbe obtained from corresponding mixtures.
( ~8 e- }. z* ZKeywords: antireflective coating, hybrid coating, rugate, gradient index,
omnidirectional

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