Journal ArticleDOI
On the definition of absorption for a Fabry-Perot interferometer
TLDR
In this paper, the concept of absorption in a Fabry-Perot (FP) interferometer is revisited, where the FP is modelled as a medium in the cavity formed by two semi-reflecting absorbing films (typically, two metallic coatings with finite thickness).Abstract:
The concept of absorption in a Fabry-Perot (FP) interferometer is revisited. The FP is modelled as a medium in the cavity formed by two semi-reflecting absorbing films (typically, two metallic coatings with finite thickness) and not merely by two interfaces. Starting from this model the concept of absorption for an isolated metallic film and for each one of the coatings of the FP is discussed. Due to the coupling between the reflected waves in the coatings, the expressions for both cases are essentially different. Furthermore, even if the two coatings of the FP were identical, the absorption takes different values in each of them. The phase lag in the reflection from the coatings depends on the angle of incidence and on their thickness, causing a shift in the position of the maxima of the transmitted and reflected irradiances.read more
Citations
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Journal ArticleDOI
Optical performance of absorber structures for thermal detectors
TL;DR: The conditions for the parameters that ensure null reflectance and transmittance for a fixed wavelength of the incident radiation are studied, and explicit expressions for the absorptance in each film are presented.
Journal ArticleDOI
Integrable wide-free-spectral-range Fabry-Perot optical filters using free-standing LiNbO~3 thin films
Ryan M. Roth,T. Izuhara,Richard L. Espinola,Djordje Djukic,Richard M. Osgood,Sasha Bakhru,H. Bakhru +6 more
TL;DR: Free-standing thin films of a complex oxide, produced by crystal ion slicing, are used as low-order etalons with very large free spectral ranges that exceed 6.78 THz for chip-scale optical filtering.
Journal ArticleDOI
Absorbing beam splitter in a Michelson interferometer
TL;DR: The equality of the reflected and the transmitted irradiances by a beam splitter that consists of a thin absorbing coating on a transparent plate is considered and an asymmetry that is discussed for a Michelson interferometer is discussed.
Journal ArticleDOI
Reflected fringes in a Fabry–Perot interferometer with absorbing coatings
TL;DR: In this paper, the Fabry-Perot interferometer (FP) is modeled as a transparent medium between two absorbing coatings with finite thickness, typically two metallic films, and the absorption in the first coating causes the reflectance of the FP to differ from an Airy function.
Dissertation
Laser decontamination and cleaning of metal surfaces : modelling and experimental studies
TL;DR: In this article, the laser ablation is proposed as an effective and safe method for metal surface cleaning and decontamination, and the model of light propagation in a scattering layer on a metal substrate is developed and applied to analyse the features of light distribution.
References
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Journal ArticleDOI
New approach to optical analysis of absorbing thin solid films
TL;DR: A powerful new technique is reported which enables realistic calculation of the optical energy gap of absorbing thin solid films by an analysis of measured transmittance and reflectance spectra in the fundamental absorption region.
Journal ArticleDOI
Fabry-Perot with an absorbing etalon cavity
TL;DR: The results show that interference filters, because of their high reflective finesse, have absorption effects which degrade their ultimate performance.
Journal ArticleDOI
Absorptance of thin films
R. G. Buckley,D. Beaglehole +1 more
TL;DR: This paper describes a study of the absorptance of thin films with the aim of elucidating the region of validity for a direct relationship between the absorPTance and the absorption coefficient.
Journal ArticleDOI
Influence of coating thickness on the performance of a Fabry-Perot interferometer.
TL;DR: The effects of the coating thickness on the physical performance of a Fabry-erot interferometer (FP) are investigated, and a merit function is defined that optimizes the compromise between peak transmission and finesse.