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Optical constants

Refractive index of BaF2 (Barium fluoride)

Bosomworth 1967: k 55–1000 µm; 5 K

Data
tabulated k
Range
54.95–1000 µm
Points
173
Temperature
5 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength. Note: the source gives k only; n is not available.

At one wavelength

Range 54.95–1000 µm
Refractive index n
—
Extinction coefficient k
0.000544639
Permittivity ε1
—
Permittivity ε2
—
Absorption coefficient α
0.292484 cm⁻¹
Penetration depth δ = λ/(2πk)
6.83797e+07 nm
Abbe number Vd
—
Chromatic dispersion dn/dλ
— µm⁻¹
Group index ng
—
Group velocity dispersion
— fs²/mm
Dispersion parameter D
— ps/(nm·km)
Photon energy
0.00529847 eV

ε = (n + ik)², α = 4πk/λ, ng = n − λ dn/dλ, GVD = λ³/(2πc²) d²n/dλ², D = −(λ/c) d²n/dλ². Group-velocity dispersion is given for formula data only.

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Comments and conditions

5 K

Conditions

temperature
5 K
Notes on the source data (kept exactly as published):
  • the source gives k only; n is not available

References

D. R. Bosomworth. Far-infrared optical properties of CaF2, SrF2, BaF2, and CdF2. Phys. Rev., 157, 709 (1967)
  • doi:10.1103/physrev.157.709 Far-Infrared Optical Properties of Ca<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, Sr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, Ba<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, and Cd<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, Physical Review (1967)

Cite

D. R. Bosomworth. Far-Infrared Optical Properties of Ca<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, Sr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, Ba<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>, and Cd<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>. Physical Review, 157, 709-715 (1967), doi:10.1103/physrev.157.709; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

173 rows as published
CSV comma separated TXT tab separated YAML n, k Full database record original YAML All quantities CSV JSON metadata
BaF2 (Barium fluoride), Bosomworth 1967: k 55–1000 µm; 5 K: n and k versus wavelength
λ (µm)k
54.9450.0129
55.2490.00973
55.5560.00767
55.8660.0071
56.180.00725
56.4970.00935
56.8180.0137
57.1430.013
57.4710.0244
57.8030.0193
58.140.0137
58.480.00854
58.8240.00581
59.1720.00441
59.5240.00374
59.880.00325
60.2410.00286
60.6060.00252
60.9760.00223
61.350.00201
61.7280.00184
62.1120.00167
62.50.0015
62.8930.0014
63.2910.00133
63.6940.00127
64.1030.00123
64.5160.00121
64.9350.00122
65.3590.00126
65.7890.00134
66.2250.0015
66.6670.00185
67.1140.00231
67.5680.0032
68.0270.00367
68.4930.00379
68.9660.00369
69.4440.00338
69.930.00301
70.4230.00267
70.9220.00219
71.4290.00192
71.9420.00178
72.4640.00168
72.9930.00158
73.5290.00149
74.0740.0014
74.6270.00132
75.1880.00125
75.7580.0012
76.3360.00115
76.9230.0011
77.5190.00105
78.1250.00101
78.740.000969
79.3650.000933
80.00.0009
80.6450.000872
81.3010.000847
81.9670.000824
82.6450.000803
83.3330.000783
84.0340.000764
84.7460.000746
85.470.000728
86.2070.000711
86.9570.000694
87.7190.000678
88.4960.000664
89.2860.00065
90.090.000639
90.9090.00063
91.7430.000624
92.5930.000619
93.4580.000616
94.340.000614
95.2380.000613
96.1540.000612
97.0870.000611
98.0390.00061
99.010.000609
100.00.000607
101.010.000607
102.040.000607
103.090.000607
104.170.000609
105.260.000611
106.380.000613
107.530.000615
108.70.000614
109.890.000612
111.110.000609
112.360.000606
113.640.000603
114.940.000602
116.280.000601
117.650.000602
119.050.000602
120.480.000603
121.950.000604
123.460.000603
125.00.0006
126.580.000597
128.210.000594
129.870.000592
131.580.000591
133.330.00059
135.140.000589
136.990.000589
138.890.000589
140.850.000589
142.860.000589
144.930.000589
147.060.00059
149.250.000592
151.520.000595
153.850.000598
156.250.000596
158.730.000591
161.290.000586
163.930.00058
166.670.000574
169.490.000568
172.410.000562
175.440.000556
178.570.00055
181.820.000545
185.190.000541
188.680.000542
192.310.000549
196.080.000558
200.00.00056
204.080.000554
208.330.000545
212.770.000534
217.390.000525
222.220.000519
227.270.000524
232.560.000541
238.10.000555
243.90.000549
250.00.000527
256.410.00047
263.160.000465
270.270.000459
277.780.000453
285.710.000446
294.120.00044
303.030.000434
312.50.000428
322.580.000424
333.330.00042
344.830.000419
357.140.00042
370.370.000426
384.620.000436
400.00.000451
416.670.000472
434.780.0005
454.550.000534
476.190.000571
500.00.000606
526.320.000634
555.560.000649
588.240.000653
625.00.000645
666.670.00063
714.290.000614
769.230.000607
833.330.000617
909.090.000651
1000.00.000718