77‐4: Large Form Birefringence Realized by Dielectric Subwavelength Grating

2019 ◽  
Vol 50 (1) ◽  
pp. 1110-1113
Author(s):  
Dunhang Quan ◽  
Hao Jia ◽  
Weihao Li ◽  
Xing Cheng ◽  
Hoi-Sing Kwok
Keyword(s):  
Subwavelength Grating ◽  
Large Form ◽  
Form Birefringence

scholarly journals Tunable negative group index in metamaterial structures with large form birefringence

2010 ◽  
Vol 18 (2) ◽  
pp. 463 ◽  
Author(s):  
Kirill Sinchuk ◽  
Richard Dudley ◽  
John D. Graham ◽  
Michael Clare ◽  
Mesfin Woldeyohannes ◽  
...  
Keyword(s):  
Group Index ◽  
Negative Group ◽  
Large Form ◽  
Form Birefringence

Optical Properties of Organic Complexes of Montmorillonite

Clay Minerals ◽  
1970 ◽  
Vol 8 (4) ◽  
pp. 405-419 ◽  
Author(s):  
R. Greene-Kelly
Keyword(s):  
Optical Properties ◽  
Aromatic Compounds ◽  
Optical Constants ◽  
Large Form ◽  
Form Birefringence ◽  
Orientation Effects ◽  
Suitable Medium ◽  
Organic Complexes ◽  
Optical Examination ◽  
Intrinsic Birefringence

AbstractThe optical properties of oriented montmorillonite aggregates were measured in both non-complexing and complexing media. The changes observed lead to the following conclusions. Preparing oriented aggregates of clays for optical examination requires considerable care to avoid spurious orientation effects. In determining the optical constants of montmorillonite aggregates the medium must wet and enter the aggregate readily and displace the air, particularly from the smaller pores, otherwise large form birefringence effects of uncertain magnitude will occur. A suitable medium is likely to be one that complexes montmorillonite. The complex it forms must have relatively isotropic interlamellar layers and this is more likely with isodimensional molecules. Consideration of complexes with simple compounds suggests that the intrinsic birefringence of aggregates is overestimated by conventional techniques.Forming complexes with aromatic compounds usually results in the birefringence of the aggregate being essentially determined by the orientation and anisotropy of the intercalated molecules.

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