Evaporated films of arsenic trisulfide: Dependence of optical properties on light exposure and heat cycling*

Scott A. Keneman; Joseph Bordogna; Jay N. Zemel

doi:10.1364/JOSA.68.000032

Journal of the Optical Society of America
Vol. 68,
Issue 1,
pp. 32-38
(1978)
•https://doi.org/10.1364/JOSA.68.000032

Evaporated films of arsenic trisulfide: Dependence of optical properties on light exposure and heat cycling

Scott A. Keneman, Joseph Bordogna, and Jay N. Zemel

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Scott A. Keneman, Joseph Bordogna, and Jay N. Zemel, "Evaporated films of arsenic trisulfide: Dependence of optical properties on light exposure and heat cycling*," J. Opt. Soc. Am. 68, 32-38 (1978)

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Abstract

The optical storage effect in evaporated films of arsenic trisulfide (As₂S₃) has been investigated. Optical measurements on many films have permitted the optical constants to be determined over a broad spectral range. The optical constants have been expressed in terms of a physical model of the optical storage effect.

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		Parameters for Eq. (4) in text

Sample	Exposure history	A₀	A₀₀	A₁ (μm⁻²)	λ₀ (μm)	1000 δn	δλ_m (nm)
A	unexp.	1.7087	2.5	0.004	0.3447	1.11	0.436
	exp.	2.3088	2.26	0.0	0.3399	1.89	0.733
B	unexp.	1.7007	2.72	0.004	0.3476	2.11	0.918
	exp.	2.0138	2.84	0.0002	0.3596	1.27	0.504
C	unexp.	1.9762	2.26	0.003	0.3299	2.48	1.141
	exp.	1.9170	2.8	0.0	0.3615	2.49	0.917
D	unexp.	1.9893	2.21	0.0	0.3306	3.36	1.153
	exp.	1.5837	3.04	0.0	0.3804	3.83	1.707
Composite result for films above	unexp.	1.7626	2.5	0.004	0.3419	…	…
Composite result for films above	exp.	1.8739	2.8	0.0	0.3636	…	…

Film	Exposure		Assigned thickness	Δn (λ = 1 μm)	Δα at λ =

	Initial state	Final state			0.46 μm	0.45 μm
F	U	E1	1.360^a	0.1022	1.274	1.618
	H1	E2	1.108^a	0.0271	0.649	0.717
	H1	E2	1.018^b	0.0249	0.586	0.570
E	H2	E3	0.987^b	…	0.581	0.607
	H3	E4	0.984^b	…	0.520	0.475
	H4A	E5	0.962^b	0.0364	0.752	0.762

	Δn at λ = 1 μm	Δα (μm⁻¹) at λ =

		0.46 μm	0.45 μm
Average optical change caused by exposure of heat-cycled films	0.0295	0.618	0.626
dn/dx, dα/dx computed from clustering model	2.1413	73.3	81.0
Calculated x	0.0138	0.0084	0.0077

Quantity (units)	Wavelength (μm)	Result for As₂S₃ film G	Gaussian approximation	Ratio
Δn	1.0	0.0544	0.0886	0.614
Δα (μm⁻¹)	0.42	1.73	2.492	0.694
	0.41	2.17	3.002	0.723
	0.40	2.65	3.559	0.745
	0.39	3.29	4.151	0.793
	0.38	3.77	4.764	0.791

		Parameters for Eq. (4) in text

Sample	Exposure history	A₀	A₀₀	A₁ (μm⁻²)	λ₀ (μm)	1000 δn	δλ_m (nm)
A	unexp.	1.7087	2.5	0.004	0.3447	1.11	0.436
	exp.	2.3088	2.26	0.0	0.3399	1.89	0.733
B	unexp.	1.7007	2.72	0.004	0.3476	2.11	0.918
	exp.	2.0138	2.84	0.0002	0.3596	1.27	0.504
C	unexp.	1.9762	2.26	0.003	0.3299	2.48	1.141
	exp.	1.9170	2.8	0.0	0.3615	2.49	0.917
D	unexp.	1.9893	2.21	0.0	0.3306	3.36	1.153
	exp.	1.5837	3.04	0.0	0.3804	3.83	1.707
Composite result for films above	unexp.	1.7626	2.5	0.004	0.3419	…	…
Composite result for films above	exp.	1.8739	2.8	0.0	0.3636	…	…

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Equations (29)

Journal of the Optical Society of America