Optical and Photoelectrical Properties of Amorphous Germanium Films*

Pierre J. Vernier; Jean-Pierre Goudonnet; Gérard Chabrier; Jean Cornaz

doi:10.1364/JOSA.61.001065

Optical and Photoelectrical Properties of Amorphous Germanium Films

Pierre J. Vernier, Jean-Pierre Goudonnet, Gérard Chabrier, and Jean Cornaz

Journal of the Optical Society of America
Vol. 61,
Issue 8,
pp. 1065-1076
(1971)
•https://doi.org/10.1364/JOSA.61.001065

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Pierre J. Vernier, Jean-Pierre Goudonnet, Gérard Chabrier, and Jean Cornaz, "Optical and Photoelectrical Properties of Amorphous Germanium Films*," J. Opt. Soc. Am. 61, 1065-1076 (1971)

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History
- Original Manuscript: November 12, 1970
- Published: August 1, 1971

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Abstract

We studied the photoemission process in films of amorphous Ge deposited on silica substrates. We measured, for both polarizations and for several angles of incidence, with direct and back illumination (through the substrate), the reflectance, the transmittance, and the photoemissive yield of each film without exposure to air. We analyzed the possibility of deducing with minimum error, from the experimental results, the index of refraction, the thickness, and the escape probability of photoexcited electrons and we verified the validity of the model used for computation.

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n = 1.71		k = 2.74	d = 210 Å

Measure	Weight p_i	Experimental value	Calculated value
T_p(30)	2	0.0559	0.0536
R_p(30)	1	0.488	0.487
R_p(45)	1	0.422	0.421
R_p(60)	1	0.325	0.327
R_p(75)	1	0.272	0.271
T_p(45)	1	0.063	0.060
T_s(30)	4	0.040	0.041
T_s(45)	4	0.031	0.032
T_p(60)	0		0.069
R_s(30)	0		0.584
T(0)	1	0.0502	0.049

n = 1.92		k = 1.99	d = 45 Å

Measure	Weight p_i	Experimental value	Calculated value

T_p(30)	0.2	0.5629	0.5683
R_p(30)	1	0.1255	0.1264
R_p(45)	1	0.0789	0.0775
R_p(60)	1,5	0.0224	0.0225
R_p(75)	1,5	0.0946	0.0947
T_p(45)	0,6	0.6139	0.6137
T_s(30)	0,2	0.4917	0.4897
T_s(45)	0,3	0.4265	0.4272
T_p(60)	0		0.6612
R_s(30)	0		0.2036
T(0)	0.5	0.5320	0.5301

Yield used for estimation	cp₀
r_p⁺(0)	52
r_p⁺(30)	50
r_p⁺(45)	52
r_s⁺(0)	51
r_s⁺(30)	51
r_s⁺(45)	48
r_p⁻(0)	53
r_p⁻(30)	51
r_p⁻(45)	49
r_p⁻(0)	54
r_s⁻(30)	50
r_s⁻(45)	48

Film number	cp₀
1	50
2	37
3	53
4	85
5	85
6	55

n = 1.71		k = 2.74	d = 210 Å

Measure	Weight p_i	Experimental value	Calculated value
T_p(30)	2	0.0559	0.0536
R_p(30)	1	0.488	0.487
R_p(45)	1	0.422	0.421
R_p(60)	1	0.325	0.327
R_p(75)	1	0.272	0.271
T_p(45)	1	0.063	0.060
T_s(30)	4	0.040	0.041
T_s(45)	4	0.031	0.032
T_p(60)	0		0.069
R_s(30)	0		0.584
T(0)	1	0.0502	0.049

n = 1.92		k = 1.99	d = 45 Å

Measure	Weight p_i	Experimental value	Calculated value

T_p(30)	0.2	0.5629	0.5683
R_p(30)	1	0.1255	0.1264
R_p(45)	1	0.0789	0.0775
R_p(60)	1,5	0.0224	0.0225
R_p(75)	1,5	0.0946	0.0947
T_p(45)	0,6	0.6139	0.6137
T_s(30)	0,2	0.4917	0.4897
T_s(45)	0,3	0.4265	0.4272
T_p(60)	0		0.6612
R_s(30)	0		0.2036
T(0)	0.5	0.5320	0.5301

Yield used for estimation	cp₀
r_p⁺(0)	52
r_p⁺(30)	50
r_p⁺(45)	52
r_s⁺(0)	51
r_s⁺(30)	51
r_s⁺(45)	48
r_p⁻(0)	53
r_p⁻(30)	51
r_p⁻(45)	49
r_p⁻(0)	54
r_s⁻(30)	50
r_s⁻(45)	48

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