Title :
Optical diffraction by colloidal crystals
Author :
Allard, M. ; Sargent, E.H. ; Kumacheva, Eugenia ; Kalinina, O.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
Abstract :
Summary form only given. Colloidal crystals represent a promising avenue to realizing photonic bandgap materials. Optical diffraction in these crystals, usually observed in transmission spectra provides ample information about the internal structure. We report the measurement of the reflection spectrum at various angles of incidence and show how these measurements can be used to evaluate the quality of the internal ordering of colloidal crystals. Our colloidal crystals consist of poly(methyl methacrylate) latex microspheres that have settled under controlled oscillatory shear to produce three-dimensional close-packed face-centered cubic arrays.
Keywords :
colloids; infrared spectra; light diffraction; optical polymers; photonic band gap; reflectivity; visible spectra; angles of incidence; colloidal crystals; controlled oscillatory shear; internal ordering; internal structure; optical diffraction; photonic bandgap materials; poly(methyl methacrylate) latex microspheres; reflection spectrum; three-dimensional close-packed face-centered cubic arrays; transmission spectra; Colloidal crystals; Data mining; Optical arrays; Optical device fabrication; Optical diffraction; Optical filters; Optical reflection; Periodic structures; Photonic band gap; Photonic crystals;
Conference_Titel :
Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-634-6
DOI :
10.1109/CLEO.2000.906886
