Low-Loss Polymer Films with Adjustable Refractive Index

Abstract

Solution-deposited polymer films with continuously adjustable refractive index (1.489−1.563) are made by blending in solution two polymers: polymethyl methacrylate (PMMA) and styrene-acrylonitrile copolymer (SAN). The dependence of index of refraction on composition was found to be linear, indicating the compatibility of the two polymers on a molecular basis. In films ~2 μm thick losses less than 0.2 dB/cm were measured. For thicker films (3.5 μm) an increased scattering loss was observed in high SAN content films.

© 1973 Optical Society of America

Impact of inorganic nanoparticles on optical properties of low refractive index waveguiding polymers

Leonid M. Goldenberg, Mathias Köhler, Olaf Kahle, and Christian Dreyer
Opt. Mater. Express 10(11) 2987-2997 (2020)

Optical recording of refractive-index patterns in doped poly-(methyl methacrylate) films

Hilmar Franke
Appl. Opt. 23(16) 2729-2733 (1984)

Homogeneous polymer blend microparticles with a tunable refractive index

M. D. Barnes, C.-Y. Kung, N. Lermer, K. Fukui, B. G. Sumpter, D. W. Noid, and J. U. Otaigbe
Opt. Lett. 24(3) 121-123 (1999)

Particle-Size Determination by Low-Angle Light Scattering: Effect of Refractive Index

E. J. Meehan and A. E. Gyberg
Appl. Opt. 12(3) 551-554 (1973)

Barium Silicate Films for Integrated Optical Circuits

J. E. Goell
Appl. Opt. 12(4) 737-742 (1973)