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Optical constants

Refractive index of BaF2 (Barium fluoride)

Bosomworth 1967: k 71.5–1000 µm; 200 K

Data
tabulated k
Range
71.43–1000 µm
Points
131
Temperature
200 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 71.43–1000 µm
Refractive index n
—
Extinction coefficient k
0.0149759
Permittivity ε1
—
Permittivity ε2
—
Absorption coefficient α
7.04844 cm⁻¹
Penetration depth δ = λ/(2πk)
2.83751e+06 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
0.0046436 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

200 K

Conditions

temperature
200 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

131 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 71.5–1000 µm; 200 K: n and k versus wavelength
λ (µm)k
71.4290.0468
71.9420.0452
72.4640.0438
72.9930.0425
73.5290.0413
74.0740.0402
74.6270.0391
75.1880.0381
75.7580.0373
76.3360.0364
76.9230.0357
77.5190.0349
78.1250.0342
78.740.0336
79.3650.033
80.00.0324
80.6450.0319
81.3010.0313
81.9670.0308
82.6450.0303
83.3330.0298
84.0340.0294
84.7460.029
85.470.0285
86.2070.0282
86.9570.0278
87.7190.0274
88.4960.0271
89.2860.0268
90.090.0264
90.9090.0261
91.7430.0258
92.5930.0255
93.4580.0252
94.340.0249
95.2380.0246
96.1540.0243
97.0870.0241
98.0390.0238
99.010.0236
100.00.0233
101.010.0227
102.040.0222
103.090.0218
104.170.0216
105.260.0215
106.380.0214
107.530.0213
108.70.0213
109.890.0214
111.110.0214
112.360.0215
113.640.0216
114.940.0217
116.280.0219
117.650.022
119.050.0221
120.480.0221
121.950.022
123.460.0214
125.00.0209
126.580.0206
128.210.0201
129.870.0197
131.580.0193
133.330.0189
135.140.0186
136.990.0183
138.890.018
140.850.0177
142.860.0176
144.930.0174
147.060.0172
149.250.0172
151.520.0172
153.850.0173
156.250.0176
158.730.018
161.290.0185
163.930.0191
166.670.0199
169.490.0209
172.410.0218
175.440.0227
178.570.0238
181.820.0247
185.190.0253
188.680.0257
192.310.0257
196.080.0248
200.00.0241
204.080.0232
208.330.0225
212.770.0217
217.390.021
222.220.0201
227.270.0193
232.560.0185
238.10.0177
243.90.0171
250.00.0165
256.410.0159
263.160.0153
270.270.0147
277.780.0142
285.710.0137
294.120.0132
303.030.0127
312.50.0122
322.580.0118
333.330.0114
344.830.011
357.140.0106
370.370.0102
384.620.00976
400.00.00943
416.670.00912
434.780.0088
454.550.00846
476.190.00809
500.00.00769
526.320.00736
555.560.00712
588.240.00688
625.00.00663
666.670.00636
714.290.00607
769.230.00576
833.330.00547
909.090.00525
1000.00.00512