Unprecedentedly high reflectivity distributed Bragg reflectors consisting of fluorocarbon polymer (CFx) and high refractive index inorganic oxide multilayers have been fabricated by means of assisted ion-beam sputtering at room temperature. Multilayer stacks consisting of a CFx/TiOx and CFx/HfOx pairs exhibit reflectivities larger than 98% in the infrared and ultraviolet spectral region, respectively. The superior wide tunability and the high efficiency, with respect to inorganic-inorganic multilayers is due to the exceptionally low refractive index of the fluorcarbon polymer (n similar or equal to 1.35) on a very large spectral region (300-2000 nm). (C) 1997 American Institute of Physics.
Organic-inorganic dielectric multilayer systems as high reflectivity distributed Bragg reflectors
VALENTINI, Antonio;LIGONZO, Teresa;
1997-01-01
Abstract
Unprecedentedly high reflectivity distributed Bragg reflectors consisting of fluorocarbon polymer (CFx) and high refractive index inorganic oxide multilayers have been fabricated by means of assisted ion-beam sputtering at room temperature. Multilayer stacks consisting of a CFx/TiOx and CFx/HfOx pairs exhibit reflectivities larger than 98% in the infrared and ultraviolet spectral region, respectively. The superior wide tunability and the high efficiency, with respect to inorganic-inorganic multilayers is due to the exceptionally low refractive index of the fluorcarbon polymer (n similar or equal to 1.35) on a very large spectral region (300-2000 nm). (C) 1997 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
