Refractive index measurements of CaF2 single crystal and melt by ellipsometry

Shakhawat H. Firoz; Takashi Sakamaki; Rie Kojima Endo; Masahiro Susa

Refractive index measurements of CaF₂ single crystal and melt by ellipsometry

Shakhawat H. Firoz, Takashi Sakamaki, Rie Kojima Endo, Masahiro Susa

Research output: Contribution to journal › Article › peer-review

Abstract

Refractive indices of CaF₂ have been determined by ellipsometry and factors determining the temperature dependence are discussed. Measurements were made on CaF₂ single crystal and melt in dehydrated helium atmosphere in the temperature ranges from room temperature to 1050K and from 1600K to 1800 K, respectively. The standard deviation in the measured refractive indices was within ±0.001. The following equations were fitted to the measured refractive indices: Single crystal: n = n298 - 1.541 x 10 ^-5(T/K - 298) 298K - 1050K, melt: n = n₁₆₀₀ - 4.667 x 10^-5(T/K - 1600) 1600K - 1800K, where n₂₉₈ = 1.429 and n₁₆₀₀ = 1.409. It is likely that the temperature coefficients are determined predominantly by those of the densities.

Original language	English
Pages (from-to)	163-173
Number of pages	11
Journal	High Temperatures - High Pressures
Volume	37
Issue number	2
Publication status	Published - 2008
Externally published	Yes

Keywords

CaF single crystal and melt
Ellipsometry and molar electronic polarisability
Refractive index

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Physical and Theoretical Chemistry

Cite this

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title = "Refractive index measurements of CaF2 single crystal and melt by ellipsometry",

abstract = "Refractive indices of CaF2 have been determined by ellipsometry and factors determining the temperature dependence are discussed. Measurements were made on CaF2 single crystal and melt in dehydrated helium atmosphere in the temperature ranges from room temperature to 1050K and from 1600K to 1800 K, respectively. The standard deviation in the measured refractive indices was within ±0.001. The following equations were fitted to the measured refractive indices: Single crystal: n = n298 - 1.541 x 10 -5(T/K - 298) 298K - 1050K, melt: n = n1600 - 4.667 x 10-5(T/K - 1600) 1600K - 1800K, where n298 = 1.429 and n1600 = 1.409. It is likely that the temperature coefficients are determined predominantly by those of the densities.",

keywords = "CaF single crystal and melt, Ellipsometry and molar electronic polarisability, Refractive index",

author = "Firoz, {Shakhawat H.} and Takashi Sakamaki and Endo, {Rie Kojima} and Masahiro Susa",

year = "2008",

language = "English",

volume = "37",

pages = "163--173",

journal = "High Temperatures - High Pressures",

issn = "0018-1544",

publisher = "Old City Publishing",

number = "2",

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TY - JOUR

T1 - Refractive index measurements of CaF2 single crystal and melt by ellipsometry

AU - Firoz, Shakhawat H.

AU - Sakamaki, Takashi

AU - Endo, Rie Kojima

AU - Susa, Masahiro

PY - 2008

Y1 - 2008

N2 - Refractive indices of CaF2 have been determined by ellipsometry and factors determining the temperature dependence are discussed. Measurements were made on CaF2 single crystal and melt in dehydrated helium atmosphere in the temperature ranges from room temperature to 1050K and from 1600K to 1800 K, respectively. The standard deviation in the measured refractive indices was within ±0.001. The following equations were fitted to the measured refractive indices: Single crystal: n = n298 - 1.541 x 10 -5(T/K - 298) 298K - 1050K, melt: n = n1600 - 4.667 x 10-5(T/K - 1600) 1600K - 1800K, where n298 = 1.429 and n1600 = 1.409. It is likely that the temperature coefficients are determined predominantly by those of the densities.

AB - Refractive indices of CaF2 have been determined by ellipsometry and factors determining the temperature dependence are discussed. Measurements were made on CaF2 single crystal and melt in dehydrated helium atmosphere in the temperature ranges from room temperature to 1050K and from 1600K to 1800 K, respectively. The standard deviation in the measured refractive indices was within ±0.001. The following equations were fitted to the measured refractive indices: Single crystal: n = n298 - 1.541 x 10 -5(T/K - 298) 298K - 1050K, melt: n = n1600 - 4.667 x 10-5(T/K - 1600) 1600K - 1800K, where n298 = 1.429 and n1600 = 1.409. It is likely that the temperature coefficients are determined predominantly by those of the densities.

KW - CaF single crystal and melt

KW - Ellipsometry and molar electronic polarisability

KW - Refractive index

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JO - High Temperatures - High Pressures

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Refractive index measurements of CaF₂ single crystal and melt by ellipsometry

Abstract

Keywords

ASJC Scopus subject areas

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