Near-infrared refractive index of bismuth germanium oxide (Bi<sub>12</sub>GeO<sub>20</sub>)

E. Burattini; G. Cappuccio; M. Grandolfo; P. Vecchia; Sh. M. Efendiev

doi:10.1364/JOSA.73.000495

Journal of the Optical Society of America
Vol. 73,
Issue 4,
pp. 495-497
(1983)
•https://doi.org/10.1364/JOSA.73.000495

Near-infrared refractive index of bismuth germanium oxide (Bi₁₂GeO₂₀)

E. Burattini, G. Cappuccio, M. Grandolfo, P. Vecchia, and Sh. M. Efendiev

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E. Burattini, G. Cappuccio, M. Grandolfo, P. Vecchia, and Sh. M. Efendiev, "Near-infrared refractive index of bismuth germanium oxide (Bi₁₂GeO₂₀)," J. Opt. Soc. Am. 73, 495-497 (1983)

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Abstract

The dispersion of the refractive index of Bi₁₂GeO₂₀ in the range 1.2–5.0 μm at room temperature has been obtained. Data have been analyzed in terms of Ketteler, Sellmeier–Drude, Lorentz–Lorenz, and Herzberger dispersion formulas. It is found that a Herzberger formula completely describes data on n(λ) up to the visible region.

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λ/μm	$\bar{ν} / {cm}^{- 1}$	n_calc	k_calc × 10⁵
0.4	25000	2.926	–
0.5	20000	2.651	–
0.6	16667	2.549	–
0.7	14286	2.499	–
0.8	12500	2.472	–
0.9	11111	2.454	–
1.0	10000	2.442	–
1.1	9091	2.434	–
1.2	8333	2.427	0.457
1.3	7692	2.421	0.562
1.4	7143	2.416	0.667
1.5	6667	2.412	0.773
1.6	6250	2.409	0.878
1.7	5882	2.405	0.984
1.8	5556	2.402	1.089
1.9	5263	2.399	1.194
2.0	5000	2.396	1.300
2.1	4762	2.393	1.405
2.2	4545	2.390	1.510
2.3	4348	2.387	1.616
2.4	4167	2.384	1.721
2.5	4000	2.382	1.826
2.6	3846	2.379	1.932
2.7	3704	2.376	2,037
2.8	3571	2.371	2.142
2.9	3448	2.371	2.248
3.0	3333	2.368	2.353
3.1	3226	2.366	2.459
3.2	3125	2.363	2.564
3.3	3030	2.360	2.669
3.4	2941	2.358	2.775
3.5	2857	2.355	2.880
3.6	2778	2.353	2.985
3.7	2703	2.351	3.091
3.8	2632	2.348	3.196
3.9	2564	2.346	3.301
4.0	2500	2.344	3.512
4.1	2439	2.342	3.618
4.2	2381	2.340	3.723
4.3	2326	2.339	3.828
4.4	2273	2.337	3.934
4.5	2222	2.336	3.039
4.6	2174	2.334	4.144
4.7	2128	2.333	4.250
4.8	2083	2.332	4.355
4.9	2041	2.332	4.460
5.0	2000	2.331	4.565

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Equations (10)

Journal of the Optical Society of America