Optical and durability properties of infrared transmitting thin films

Jennifer D. Traylor Kruschwitz; Walter T. Pawlewicz

doi:10.1364/AO.36.002157

Optical and durability properties of infrared transmitting thin films

Jennifer D. Traylor Kruschwitz and Walter T. Pawlewicz

Applied Optics
Vol. 36,
Issue 10,
pp. 2157-2159
(1997)
•https://doi.org/10.1364/AO.36.002157

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Jennifer D. Traylor Kruschwitz and Walter T. Pawlewicz, "Optical and durability properties of infrared transmitting thin films," Appl. Opt. 36, 2157-2159 (1997)

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History
- Original Manuscript: August 5, 1996
- Revised Manuscript: December 5, 1996
- Published: April 1, 1997

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Abstract

Refractive indices and extinction coefficients have been calculated for 14 oxide and fluoride thin films over a wavelength range of 0.6–12 µm. Results from adhesion, abrasion, and humidity testing have been included to characterize the durability of each film. The data allow selection of the best oxide and fluoride materials for IR antireflection coatings, and detailed optical constants are provided for the coating design.

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Material Deposited	Moderate Abrasion (Cheesecloth)	Severe Abrasion (Eraser)	Adhesion (Slow Tape)	Adhesion (Fast Tape)	24-h Humidity and Slow Tape
Bi₂O₃	Pa	Fb	P	P	Pc
Cr₂O₃	F	F	P	P	F
HfO₂	P	P	P	P	P
Ta₂O₅	P	P	P	P	P
Y₂O₃	P	P	P	P	P
ZrO₂	P	F	P	P	P
CaF₂	P		P		F
CeF₃	P		P	P	P
HfF₄	P		P	P	F
LaF₃	P		P	P	P
NdF₃	P		P		P
PbF₂	P		P		F
SrF₂	P		P		P
YbF₃	P		P	P	P

	Bi₂O₃		Cr₂O₃		HfO₂		Ta₂O₅		Y₂O₃		ZrO₂		CaF₂
Wavelength (µm)	n	k	n	k	n	k	n	k a	n	k	n	k	n	k
0.6	2.7	0.005			1.917		2.1	0.007			2.192		1.4	0.001
0.7	2.6	0.004	2.242	0.070	1.911		2.08	0.003			2.185		1.39	0.001
0.8	2.5	0.004			1.909		2.07	0.002			2.178		1.39
0.9	2.47	0.003	2.234	0.042	1.906		2.05	0.001	1.89		2.17		1.39
1.0	2.46	0.001	2.23	0.040	1.904		2.01	0.001	1.85		2.163		1.38
1.5	2.35	0.001	2.21	0.020	1.89		1.994		1.83		2.125		1.36
2.0	2.25		2.15	0.009	1.885	0.002	1.989		1.8		2.087		1.35
8.0	2.2		2.1	0.007	1.88	0.006	1.95		1.7	0.006	2.05		1.32
9.0	2.2		2.1	0.030	1.88	0.030	1.95	0.030	1.69	0.015	2.05	0.010	1.32
10.0	2.2	0.010	2.1	0.15	1.88	0.070	1.95	0.235	1.68	0.033	2.05	0.060	1.32	0.010
11.0	2.2	0.020	2.1	0.15	1.88	0.120	1.95	0.500	1.68	0.070	2.05	0.120	1.32	0.020
12.0	2.2	0.025	2.1	0.25		0.220	1.95	0.660	1.67	0.130	2.05	0.190	1.32	0.022

	CeF₃		HfF₄		LaF₃		NdF₃		PbF₂		SrF₂		YbF₃
Wavelength (µm)	n	k	n	k	n	k	n	k	n	k	n	k	n	k
0.6	1.64		1.57		1.58		1.7		1.46		1.46		1.52
0.7	1.64		1.56		1.58		1.7		1.46		1.46		1.52
0.8	1.64		1.56		1.58		1.69		1.45		1.45		1.52
0.9	1.64		1.56		1.57		1.69		1.45		1.45		1.52
1.0	1.64		1.55		1.57		1.69		1.45		1.45		1.52
1.5	1.63		1.53		1.56		1.67		1.45		1.45		1.51
2.0	1.63		1.52		1.56		1.66		1.43		1.43		1.51
2.94	1.63		1.53		1.56		1.66		1.43		1.43		1.51
8.0	1.57		1.46		1.52	0.010	1.6		1.3	0.010	1.3	0.010	1.48	0.010
9.0	1.57	0.010	1.46	0.010	1.52	0.010	1.6		1.3	0.014	1.3	0.011	1.48	0.015
10.0	1.57	0.015	1.46	0.030	1.52	0.020	1.6	0.010	1.3	0.020	1.3	0.015	1.48	0.025
11.0	1.57	0.025	1.46	0.050	1.52	0.035	1.6	0.017	1.28	0.029	1.28	0.017	1.48	0.040
12.0	1.57	0.032	1.46	0.070	1.52	0.054	1.6	0.025	1.27	0.030	1.27	0.020	1.48	0.055

Material Deposited	Moderate Abrasion (Cheesecloth)	Severe Abrasion (Eraser)	Adhesion (Slow Tape)	Adhesion (Fast Tape)	24-h Humidity and Slow Tape
Bi₂O₃	Pa	Fb	P	P	Pc
Cr₂O₃	F	F	P	P	F
HfO₂	P	P	P	P	P
Ta₂O₅	P	P	P	P	P
Y₂O₃	P	P	P	P	P
ZrO₂	P	F	P	P	P
CaF₂	P		P		F
CeF₃	P		P	P	P
HfF₄	P		P	P	F
LaF₃	P		P	P	P
NdF₃	P		P		P
PbF₂	P		P		F
SrF₂	P		P		P
YbF₃	P		P	P	P

	Bi₂O₃		Cr₂O₃		HfO₂		Ta₂O₅		Y₂O₃		ZrO₂		CaF₂
Wavelength (µm)	n	k	n	k	n	k	n	k a	n	k	n	k	n	k
0.6	2.7	0.005			1.917		2.1	0.007			2.192		1.4	0.001
0.7	2.6	0.004	2.242	0.070	1.911		2.08	0.003			2.185		1.39	0.001
0.8	2.5	0.004			1.909		2.07	0.002			2.178		1.39
0.9	2.47	0.003	2.234	0.042	1.906		2.05	0.001	1.89		2.17		1.39
1.0	2.46	0.001	2.23	0.040	1.904		2.01	0.001	1.85		2.163		1.38
1.5	2.35	0.001	2.21	0.020	1.89		1.994		1.83		2.125		1.36
2.0	2.25		2.15	0.009	1.885	0.002	1.989		1.8		2.087		1.35
8.0	2.2		2.1	0.007	1.88	0.006	1.95		1.7	0.006	2.05		1.32
9.0	2.2		2.1	0.030	1.88	0.030	1.95	0.030	1.69	0.015	2.05	0.010	1.32
10.0	2.2	0.010	2.1	0.15	1.88	0.070	1.95	0.235	1.68	0.033	2.05	0.060	1.32	0.010
11.0	2.2	0.020	2.1	0.15	1.88	0.120	1.95	0.500	1.68	0.070	2.05	0.120	1.32	0.020
12.0	2.2	0.025	2.1	0.25		0.220	1.95	0.660	1.67	0.130	2.05	0.190	1.32	0.022

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