Amorphous silica doped with organic impurities as optically active material for low-temperature hole-burning spectroscopy (abstract)

1990 ◽  
Vol 37 (1-3) ◽  
pp. 264
Author(s):  
J. Bitova ◽  
I. Renge
Keyword(s):  
Low Temperature ◽  
Amorphous Silica ◽  
Active Material ◽  
Optically Active ◽  
Hole Burning ◽  
Organic Impurities ◽  
Optically Active Material

Plasmonic Biofoam: A Versatile Optically Active Material

Nano Letters ◽  
2015 ◽  
Vol 16 (1) ◽  
pp. 609-616 ◽  
Author(s):  
Limei Tian ◽  
Jingyi Luan ◽  
Keng-Ku Liu ◽  
Qisheng Jiang ◽  
Sirimuvva Tadepalli ◽  
...  
Keyword(s):  
Active Material ◽  
Optically Active ◽  
Optically Active Material

Critical Pitch in Thin Cholesteric Films with Homeotropic Boundaries

1976 ◽  
Vol 31 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Fred Fischer
Keyword(s):  
General Solution ◽  
Active Material ◽  
Film Plane ◽  
Optically Active ◽  
Critical Voltage ◽  
Director Field ◽  
Planar Texture ◽  
Normal Orientation ◽  
Additional Influence ◽  
Optically Active Material

Calculations of the planar cholesteric texture with homeotropic boundary conditions are presented. At a constant film thickness there is a critical twist t0c below which the planar texture has transformed into a homeotropic one. The additional influence of an external field is discussed for positive and negative anisotropy and with field orientations parallel or normal to the film plane. A general solution of the director field has been found for a normal orientation of the field. A properly adjusted twist t0 obtained by dilution of an optically active material in a nematic matrix opens a possibility to reduce the critical voltage in technical devices.

ELECTRO-OPTIC AND ELECTRO-GYRATION EFFECTS IN CHIRAL MOLECULAR SYSTEMS

2004 ◽  
Vol 13 (03n04) ◽  
pp. 397-404 ◽  
Author(s):  
AHYOUNG KIM ◽  
J. W. WU ◽  
S. H. HAN ◽  
BYOUNGCHOO PARK ◽  
HIDEO TAKEZOE
Keyword(s):  
Liquid Crystalline ◽  
Superposition Principle ◽  
Active Material ◽  
Rotatory Power ◽  
Optically Active ◽  
Molecular Systems ◽  
Optical Responses ◽  
Electro Optic ◽  
Material Systems ◽  
Optically Active Material

The linear electro-optic (EO) and electro-gyration (EG) effects are studied in an optically active material systems including Bi 12 SiO 20 (BSO) oxide and bent-core liquid crystals. In an isotropic BSO sample, the breaking of intrinsic centro-symmetry allowed the EO modulation of the refractive index. In a mixture of bent-shaped liquid crystalline molecules having both optical activity and birefringence, the observed intensity modulation is investigated, which is related to the nonlinear optical responses of both the optical rotatory power and the birefringence. Both the linear EO and EG effects are understood in terms of the superposition principle of linear and circular birefringences.

Hole-burning spectroscopy on organic molecules in amorphous silica

1987 ◽  
Vol 138 (5) ◽  
pp. 405-409 ◽  
Author(s):  
René Locher ◽  
Alois Renn ◽  
Urs P. Wild
Keyword(s):  
Amorphous Silica ◽  
Organic Molecules ◽  
Hole Burning
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