Abstract—A theoretical formalism is established for double-! E# a2 T# ]6 P' S% |
layer(DL)antireflectioncoating(ARC)onaone-dimensional
3 |) }, l* r9 E6 Z8 S6 Q(1-D)photoniccrystal(PC).ConventionalDL-ARCforabulkis
' `6 F2 x$ u- p+ a. W5 y3 d+ tequallyapplicablefora1-DPCwhenthebulksubstrateindexis* k3 g3 q. b5 J( q5 P2 G+ W* \
replacedwiththeopticaladmittance,whichcanbeobtainedfrom2 g' y, p) R5 X4 R6 q: P, @1 \" @0 y
theelectromagneticBlochwavesoftheinfinite1-DPC.Numerical
/ u* K( Q: q2 X6 }# o% e& qcalculationsareperformedforamodelstructurecomposedof
% b3 Q( s" |2 `1 g. G6 ^GaAsandAlAs-oxidelayerstoconfirmthevalidityofthetheory.+ _7 s; [" X6 s5 o% E! _+ h6 o
Intermsofrealizationandpracticality,thisDL-ARCisexpected4 [2 G( a" K$ `, w
tobesuperiortothesingle-layerversion.
! V; M) N+ `- g# ZIndexTerms—Blochwave,double-layerantireflectioncoating
X; S3 I$ V- {$ A5 | X6 K& C(DL-ARC),one-dimensionalphotoniccrystals(1-DPCs),optical! i3 A7 p" ~. A( E/ Q( k- E3 p8 {
admittance. |
发表于 2007-5-27 01:36:36
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