Optical Characterization of Gadolinium Fluoride Films Using
Universal Dispersion Model

J 2023

Optical Characterization of Gadolinium Fluoride Films Using Universal Dispersion Model

FRANTA, Daniel, Jiří VOHÁNKA, Jan DVOŘÁK, Pavel FRANTA, Ivan OHLÍDAL et. al.

Basic information

Original name

Optical Characterization of Gadolinium Fluoride Films Using Universal Dispersion Model

Authors

FRANTA, Daniel (203 Czech Republic, guarantor, belonging to the institution), Jiří VOHÁNKA (203 Czech Republic, belonging to the institution), Jan DVOŘÁK (203 Czech Republic, belonging to the institution), Pavel FRANTA (203 Czech Republic, belonging to the institution), Ivan OHLÍDAL (203 Czech Republic, belonging to the institution), Petr KLAPETEK, Jaromír BŘEZINA and David ŠKODA

Edition

Coatings, MDPI, 2023, 2079-6412

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

20501 Materials engineering

Country of publisher

Switzerland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 3.400 in 2022

RIV identification code

RIV/00216224:14310/23:00130861

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.3390/coatings13020218

UT WoS

000938947900001

Keywords in English

gadolinium fluoride; optical constants; dielectric response; ellipsometry; spectrophotometry; refractive index profile; roughness; porosity; heterogeneous data processing

Abstract

V originále

The optical characterization of gadolinium fluoride (GdF3) films is performed in a wide spectral range using heterogeneous data-processing methods (the ellipsometric and spectrophotometric measurements for five samples with thicknesses ranging from 20 to 600 nm are processed simultaneously). The main result of the characterization is the optical constants of GdF3 in the range from far infrared to vacuum ultraviolet, both in the form of a table and in the form of dispersion parameters of the universal dispersion model (UDM). Such reliable data in such a broad spectral range have not been published so far. The GdF3 films exhibit several defects related to the porous polycrystalline structure, namely, surface roughness and a refractive index profile, which complicate the optical characterization. The main complication arises from the volatile adsorbed components, which can partially fill the pores. The presented optical method is based on the application of the UDM for the description of the optical response of GdF3 films with partially filled pores. Using this dispersion model, it is possible to effectively separate the optical response of the host material from the response of the adsorbed components. Several recently published structural and dispersion models are used for optical characterization for the first time. For example, a model of inhomogeneous rough films based on Rayleigh–Rice theory or asymmetric peak approximation with a Voigt profile for the phonon spectra of polycrystalline materials.

Links

FV40328, research and development project

Name: Realizace vrstevnatých systémů s požadovanými spektrálními závislostmi odrazivosti a propustnosti ve střední ultrafialové oblasti spektra

Investor: Ministry of Industry and Trade of the CR

90097, large research infrastructures

Name: CEPLANT

90110, large research infrastructures

Name: CzechNanoLab

Citovat

FRANTA, Daniel, Jiří VOHÁNKA, Jan DVOŘÁK, Pavel FRANTA, Ivan OHLÍDAL, Petr KLAPETEK, Jaromír BŘEZINA and David ŠKODA. Optical Characterization of Gadolinium Fluoride Films Using Universal Dispersion Model. Coatings. MDPI, 2023, vol. 13, No 2, p. 1-21. ISSN 2079-6412. Available from: https://dx.doi.org/10.3390/coatings13020218.

@article{2286924,
   author = {Franta, Daniel and Vohánka, Jiří and Dvořák, Jan and Franta, Pavel and Ohlídal, Ivan and Klapetek, Petr and Březina, Jaromír and Škoda, David},
   article_number = {2},
   doi = {http://dx.doi.org/10.3390/coatings13020218},
   keywords = {gadolinium fluoride; optical constants; dielectric response; ellipsometry; spectrophotometry; refractive index profile; roughness; porosity; heterogeneous data processing},
   language = {eng},
   issn = {2079-6412},
   journal = {Coatings},
   title = {Optical Characterization of Gadolinium Fluoride Films Using Universal Dispersion Model},
   url = {https://www.mdpi.com/2079-6412/13/2/218},
   volume = {13},
   year = {2023}
}

TY  - JOUR
ID  - 2286924
AU  - Franta, Daniel - Vohánka, Jiří - Dvořák, Jan - Franta, Pavel - Ohlídal, Ivan - Klapetek, Petr - Březina, Jaromír - Škoda, David
PY  - 2023
TI  - Optical Characterization of Gadolinium Fluoride Films Using Universal Dispersion Model
JF  - Coatings
VL  - 13
IS  - 2
SP  - 1-21
EP  - 1-21
PB  - MDPI
SN  - 20796412
KW  - gadolinium fluoride
KW  - optical constants
KW  - dielectric response
KW  - ellipsometry
KW  - spectrophotometry
KW  - refractive index profile
KW  - roughness
KW  - porosity
KW  - heterogeneous data processing
UR  - https://www.mdpi.com/2079-6412/13/2/218
N2  - The optical characterization of gadolinium fluoride (GdF3) films is performed in a wide spectral range using heterogeneous data-processing methods (the ellipsometric and spectrophotometric measurements for five samples with thicknesses ranging from 20 to 600 nm are processed simultaneously). The main result of the characterization is the optical constants of GdF3 in the range from far infrared to vacuum ultraviolet, both in the form of a table and in the form of dispersion parameters of the universal dispersion model (UDM). Such reliable data in such a broad spectral range have not been published so far. The GdF3 films exhibit several defects related to the porous polycrystalline structure, namely, surface roughness and a refractive index profile, which complicate the optical characterization. The main complication arises from the volatile adsorbed components, which can partially fill the pores. The presented optical method is based on the application of the UDM for the description of the optical response of GdF3 films with partially filled pores. Using this dispersion model, it is possible to effectively separate the optical response of the host material from the response of the adsorbed components. Several recently published structural and dispersion models are used for optical characterization for the first time. For example, a model of inhomogeneous rough films based on Rayleigh–Rice theory or asymmetric peak approximation with a Voigt profile for the phonon spectra of polycrystalline materials.
ER  -

FRANTA, Daniel, Jiří VOHÁNKA, Jan DVOŘÁK, Pavel FRANTA, Ivan OHLÍDAL, Petr KLAPETEK, Jaromír BŘEZINA and David ŠKODA. Optical Characterization of Gadolinium Fluoride Films Using Universal Dispersion Model. \textit{Coatings}. MDPI, 2023, vol.~13, No~2, p.~1-21. ISSN~2079-6412. Available from: https://dx.doi.org/10.3390/coatings13020218.

Detailed Information on Publication Record