Birefringence of interferential mirrors at normal incidence Experimental and computational study
نویسندگان
چکیده
In this paper we present a review of the existing data on interferential mirror birefringence. We also report new measurements of two sets of mirrors that confirm that mirror phase retardation per reflection decreases when mirror reflectivity increases. We finally developed a computational code to calculate the expected phase retardation per reflection as a function of the total number of layers constituting the mirror. Different cases have been studied and we have compared computational results with the trend of the experimental data. Our study indicates that the origin of the mirror intrinsic birefringence can be ascribed to the reflecting layers close to the substrate.
منابع مشابه
Giant birefringent optics in multilayer polymer mirrors
Multilayer mirrors that maintain or increase their reflectivity with increasing incidence angle can be constructed using polymers that exhibit large birefringence in their indices of refraction. The most important feature of these multilayer interference stacks is the index difference in the thickness direction (z axis) relative to the in-plane directions of the film. This z-axis refractive ind...
متن کاملTunable Filters from Lyotropic Liquid Crystals
The external field influence on the birefringence of the liquid crystalline layer is expressed by using the Cauchy dispersion equation. The basically theoretical elements of the polarization interferential filters of Lyot Ohmann and Wood type, achieved in a multilayer geometry, are given in this paper. The expressions corresponding to the transmitted maxima and to the spectral bandwidths of the...
متن کاملCavity stabilization using the weak intrinsic birefringence of dielectric mirrors.
We demonstrate a universal cavity stabilization scheme that exploits the intrinsic birefringence of dielectric multilayer mirrors. Homodyne locking using weak mirror birefringence of even an empty Fabry-Perot-type cavity requires neither frequency modulation nor mixing and allows us to generate an error signal that is comparable to more widely used heterodyne stabilization schemes.
متن کاملSubwavelength amorphous silicon transmission gratings and applications in polarizers and waveplates
Subwavelength amorphous silicon transmission gratings with a period from 100 to 800 nm and a thickness of 180 nm on silica substrates have been fabricated and studied. For a normal incident light ~l5633 nm!, in addition to strong birefringence ~as large as 170° in phase difference!, it was observed that the transmission of TE ~the electric field parallel to the grating finger! wave is significa...
متن کاملبررسی اثر پوشش نانودیاکسیدتیتانیوم بر خاصیت خود تمیز شوندگی و ضد باکتریایی آینههای دندانپزشکی
Objective: Surface coating of dental mirrors using nanotechnology has been done to render them self-cleaning properties. Nano-scaled titanium dioxide particles (TiO2)show antimicrobial properties when exposed to ultra-violet (UV) light. The aim of this study was to evaluate the effect of surface coating of dental mirrors with nano titanium dioxide on their self-cleaning (from dentists’ perspe...
متن کامل