Optical constants

Refractive index of MoS2 (Molybdenum disulfide)

Munkhbat et al. 2022: multilayer flakes; n(o),k 0.30–1.69 µm

Data
tabulated nk
Range
0.3–1.69 µm
Points
977
Optical axis
o
Licence
CC0-1.0

Uniaxial crystal, axes: oe

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.3–1.69 µm
Refractive index n
4.71244
Extinction coefficient k
0.961723
Permittivity ε1
21.2822
Permittivity ε2
9.06412
Absorption coefficient α
205673 cm⁻¹
Penetration depth δ = λ/(2πk)
97.2415 nm
Abbe number Vd
—
Chromatic dispersion dn/dλ
-5.526 µm⁻¹
Group index ng
7.95952
Group velocity dispersion
— fs²/mm
Dispersion parameter D
— ps/(nm·km)
Photon energy
2.11001 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.

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith
import lightsmith as ls

# MoS2 (Molybdenum disulfide): Munkhbat et al. 2022: multilayer flakes; n(o),k 0.30–1.69 µm
mos2 = ls.fetch_refractiveindex("main", "MoS2", "Munkhbat-o", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(mos2.range_nm)  # (300, 1690) nm
eps = mos2.eps([633])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

Comments and conditions

Multilayer flakes. In-plane (ordinary ray, o). Room temperature.

Conditions

direction
o

References

B. Munkhbat, P. Wrobel, T. J. Antosiewicz, T. O. Shegai. Optical constants of several multilayer transition metal dichalcogenides spectroscopic ellipsometry in the 300–1700 nm range: high index, anisotropy, and hyperbolicity. ACS Photonics 9, 2398–2407 (2022) (Numerical data kindly provided by Tomasz Antosiewicz)
  • doi:10.1021/acsphotonics.2c00433 Optical Constants of Several Multilayer Transition Metal Dichalcogenides Measured by Spectroscopic Ellipsometry in the 300–1700 nm Range: High Index, Anisotropy, and Hyperbolicity, ACS Photonics (2022)

Cite

Battulga Munkhbat, Piotr Wróbel, Tomasz J. Antosiewicz and Timur O. Shegai. Optical Constants of Several Multilayer Transition Metal Dichalcogenides Measured by Spectroscopic Ellipsometry in the 300–1700 nm Range: High Index, Anisotropy, and Hyperbolicity. ACS Photonics, 9, 2398-2407 (2022), doi:10.1021/acsphotonics.2c00433; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

977 rows as published
MoS2 (Molybdenum disulfide), Munkhbat et al. 2022: multilayer flakes; n(o),k 0.30–1.69 µm: n and k versus wavelength
λ (µm)nk
0.33.1260592.491241
0.3013.1326752.476525
0.3023.1384452.461892
0.3033.1433752.447387
0.3043.1474732.433051
0.3053.1507452.418926
0.3063.1532042.405054
0.3073.154862.391474
0.3083.1557272.378229
0.3093.1558222.365357
0.313.155162.352899
0.3113.153762.340895
0.3123.1516422.329381
0.3133.1488232.318399
0.3143.1453282.30799
0.3153.1411792.298196
0.3163.1364022.289058
0.3173.1310272.280621
0.3183.1250832.272932
0.3193.1186052.266039
0.323.1116312.259994
0.3213.1042042.254853
0.3223.0963772.250679
0.3233.0882112.247538
0.3243.0797792.245507
0.3253.0711752.244667
0.3263.0625192.245113
0.3273.0539682.246941
0.3283.0457322.250254
0.3293.0380932.255144
0.333.0314372.261675
0.3313.0262862.269827
0.3323.0233242.279416
0.3333.0233982.289943
0.3343.0274052.30036
0.3353.0359562.30883
0.3363.048682.312694
0.3373.0633292.30914
0.3383.0755492.296869
0.3393.0804472.277789
0.343.0753532.256669
0.3413.0611222.238515
0.3423.0408352.226275
0.3433.0177342.220584
0.3442.9941362.220724
0.3452.9713482.225562
0.3462.9499642.234036
0.3472.9301792.245313
0.3482.9119912.258787
0.3492.895322.274036
0.352.8800682.290769
0.3512.866142.308784
0.3522.8534572.32794
0.3532.8419592.348137
0.3542.8316052.369298
0.3552.8223682.391368
0.3562.8142322.414298
0.3572.8071952.438049
0.3582.8012642.462583
0.3592.796452.487864
0.362.7927732.513856
0.3612.7902572.540522
0.3622.788932.567821
0.3632.788832.595708
0.3642.7899842.624108
0.3652.7923822.652973
0.3662.7960452.682273
0.3672.8009982.711966
0.3682.8072682.742006
0.3692.8148832.772347
0.372.8238712.802933
0.3712.834262.83371
0.3722.8460772.864614
0.3732.8593392.895579
0.3742.8740692.926543
0.3752.8902852.957437
0.3762.9080062.988188
0.3772.9272473.018719
0.3782.9480193.048947
0.3792.9703283.078789
0.382.9941763.108155
0.3813.0195613.136952
0.3823.0464723.165086
0.3833.0748923.192458
0.3843.1047983.218966
0.3853.1361583.244508
0.3863.168933.268979
0.3873.2030643.292275
0.3883.2384993.314291
0.3893.2751643.334925
0.393.3129773.354076
0.3913.3518433.371649
0.3923.3916573.387554
0.3933.4323043.401707
0.3943.4736543.414033
0.3953.515573.42447
0.3963.5579043.432966
0.3973.60053.439483
0.3983.6431943.444
0.3993.6858173.446511
0.43.7281973.447029
0.4013.7701623.445587
0.4023.811543.442235
0.4033.8521643.437046
0.4043.8918733.430111
0.4053.9305183.421538
0.4063.9679583.411457
0.4074.0040723.400009
0.4084.0387513.387353
0.4094.0719083.373659
0.414.1034763.359106
0.4114.1334073.343881
0.4124.1616793.328172
0.4134.1882893.31217
0.4144.2132583.296065
0.4154.2366293.280041
0.4164.2584643.264274
0.4174.2788473.248932
0.4184.2978773.23417
0.4194.3156713.22013
0.424.3323613.206938
0.4214.3480883.194705
0.4224.3630083.183523
0.4234.3772813.173467
0.4244.3910763.164593
0.4254.4045643.156938
0.4264.417923.150519
0.4274.4313163.145336
0.4284.4449263.141369
0.4294.4589193.138579
0.434.4734593.136912
0.4314.4887023.136295
0.4324.5047973.136639
0.4334.5218833.13784
0.4344.5400883.139778
0.4354.5595273.142323
0.4364.5803023.14533
0.4374.6024973.148645
0.4384.6261853.152102
0.4394.6514173.15553
0.444.6782293.158751
0.4414.7066383.161581
0.4424.7366413.163836
0.4434.7682153.165329
0.4444.8013183.165876
0.4454.8358873.165296
0.4464.8718413.163414
0.4474.9090793.160062
0.4484.9474793.155084
0.4494.9869063.148336
0.455.0272063.139688
0.4515.0682113.129026
0.4525.1097413.116255
0.4535.1516063.101302
0.4545.1936063.08411
0.4555.2355393.06465
0.4565.2771973.04291
0.4575.3183773.018906
0.4585.3588742.992672
0.4595.3984932.964266
0.465.4370462.933766
0.4615.4743582.90127
0.4625.5102642.866894
0.4635.5446182.830766
0.4645.5772892.793029
0.4655.6081642.753838
0.4665.6371512.713353
0.4675.6641732.671741
0.4685.6891752.62917
0.4695.712122.585811
0.475.7329882.54183
0.4715.7517772.497392
0.4725.7684992.452654
0.4735.7831822.407766
0.4745.7958642.362872
0.4755.8065982.318104
0.4765.8154422.273586
0.4775.8224652.229429
0.4785.827742.185736
0.4795.8313482.142599
0.485.833372.100098
0.4815.8338932.058304
0.4825.8330012.017278
0.4835.8307821.977071
0.4845.8273211.937727
0.4855.8227041.89928
0.4865.8170121.861759
0.4875.8103281.825183
0.4885.8027271.789567
0.4895.7942851.75492
0.495.7850731.721246
0.4915.7751581.688545
0.4925.7646061.656813
0.4935.7534781.626041
0.4945.7418291.59622
0.4955.7297151.567336
0.4965.7171851.539375
0.4975.7042881.51232
0.4985.6910651.486152
0.4995.677561.460854
0.55.6638081.436404
0.5015.6498451.412782
0.5025.6357051.389967
0.5035.6214151.367938
0.5045.6070051.346672
0.5055.59251.326149
0.5065.5779221.306346
0.5075.5632921.287243
0.5085.5486321.268819
0.5095.5339571.251053
0.515.5192851.233924
0.5115.5046311.217414
0.5125.4900071.201502
0.5135.4754261.18617
0.5145.4608981.1714
0.5155.4464351.157173
0.5165.4320441.143473
0.5175.4177351.130283
0.5185.4035131.117587
0.5195.3893861.105368
0.525.3753591.093614
0.5215.3614371.082308
0.5225.3476251.071436
0.5235.3339271.060987
0.5245.3203461.050946
0.5255.3068851.041301
0.5265.2935471.032041
0.5275.2803341.023154
0.5285.2672481.014629
0.5295.254291.006456
0.535.2414620.9986243
0.5315.2287640.9911251
0.5325.2161970.9839489
0.5335.2037620.9770872
0.5345.1914590.9705315
0.5355.1792880.9642739
0.5365.1672490.9583069
0.5375.1553420.9526232
0.5385.1435670.9472161
0.5395.1319230.942079
0.545.120410.9372058
0.5415.1090270.9325906
0.5425.0977740.928228
0.5435.0866490.9241126
0.5445.0756530.9202397
0.5455.0647830.9166046
0.5465.054040.913203
0.5475.0434230.9100308
0.5485.032930.9070842
0.5495.022560.9043599
0.555.0123130.9018545
0.5515.0021880.8995651
0.5524.9921840.897489
0.5534.98230.8956237
0.5544.9725340.893967
0.5554.9628870.8925171
0.5564.9533570.8912722
0.5574.9439440.8902309
0.5584.9346460.889392
0.5594.9254630.8887546
0.564.9163950.888318
0.5614.907440.8880819
0.5624.8985990.888046
0.5634.8898710.8882105
0.5644.8812550.8885757
0.5654.8727510.8891424
0.5664.864360.8899114
0.5674.856080.890884
0.5684.8479130.8920618
0.5694.8398590.8934464
0.574.8319170.8950402
0.5714.8240890.8968455
0.5724.8163750.8988652
0.5734.8087760.9011024
0.5744.8012930.9035607
0.5754.7939290.9062439
0.5764.7866840.9091563
0.5774.7795610.9123028
0.5784.7725620.9156883
0.5794.7656890.9193187
0.584.7589470.9231998
0.5814.7523370.9273385
0.5824.7458660.9317417
0.5834.7395360.9364173
0.5844.7333540.9413735
0.5854.7273250.9466193
0.5864.7214560.9521641
0.5874.7157550.9580184
0.5884.7102290.9641931
0.5894.7048890.9706999
0.594.6997450.9775516
0.5914.694810.9847613
0.5924.6900970.9923436
0.5934.685621.000314
0.5944.6813981.008687
0.5954.677451.017482
0.5964.6737981.026716
0.5974.6704651.036407
0.5984.667481.046577
0.5994.6648731.057246
0.64.6626811.068436
0.6014.6609421.08017
0.6024.6597021.092471
0.6034.6590121.105362
0.6044.6589291.118867
0.6054.6595181.133011
0.6064.6608541.147815
0.6074.6630211.163301
0.6084.6661141.179486
0.6094.670241.196386
0.614.6755231.214009
0.6114.6821011.232356
0.6124.6901321.251419
0.6134.6997931.271174
0.6144.7112831.291578
0.6154.7248261.312564
0.6164.7406711.334034
0.6174.7590921.355848
0.6184.7803891.377813
0.6194.8048821.399669
0.624.8329081.421075
0.6214.8648051.441587
0.6224.9008971.460636
0.6234.9414631.47751
0.6244.9866961.491331
0.6255.0366471.501044
0.6265.0911481.505418
0.6275.1497211.503073
0.6285.2114731.492551
0.6295.2749991.472435
0.635.338311.441535
0.6315.3988441.399144
0.6325.4535781.345315
0.6335.4993011.281123
0.6345.5330271.208807
0.6355.5525011.131719
0.6365.5566711.054029
0.6375.5460210.9802145
0.6385.5226670.9144343
0.6395.4902010.8598766
0.645.4532940.8181636
0.6415.417030.7888572
0.6425.3859160.7692089
0.6435.3625950.7544832
0.6445.3467420.7392108
0.6455.3349870.7191963
0.6465.3223870.693191
0.6475.3046670.6630267
0.6485.2797440.6322262
0.6495.2478160.604287
0.655.2105480.5816666
0.6515.1703720.5655481
0.6525.1292820.5548867
0.6535.087320.5492719
0.6545.0449930.5487133
0.6555.0027420.5530914
0.6564.9608790.5622945
0.6574.9196210.5762855
0.6584.8791410.5951343
0.6594.8396170.6190323
0.664.8012730.6482996
0.6614.7644340.6833871
0.6624.7295780.7248746
0.6634.6974050.7734597
0.6644.6689260.8299311
0.6654.6455690.8951117
0.6664.6293030.9697525
0.6674.6227771.054348
0.6684.6294251.148838
0.6694.6534841.252172
0.674.6998121.361724
0.6714.7733681.472635
0.6724.8781881.577275
0.6735.015821.66517
0.6745.1834241.723898
0.6755.3721991.741366
0.6765.5673051.709362
0.6775.7503391.627103
0.6785.9041211.502654
0.6796.0175521.350765
0.686.0878131.188129
0.6816.1190811.028865
0.6826.119340.8822693
0.6836.0973450.7528806
0.6846.0607870.6417578
0.6856.0156230.5479084
0.6865.9660980.4693842
0.6875.9150610.4039613
0.6885.8643280.3494994
0.6895.8150010.3040987
0.695.7676960.2661444
0.6915.7227230.2342977
0.6925.680190.2074635
0.6935.6400880.1847523
0.6945.6023360.1654436
0.6955.5668130.1489538
0.6965.5333810.1348095
0.6975.5018950.1226256
0.6985.4722110.1120874
0.6995.4441910.1029373
0.75.4177050.09496299
0.7015.3926320.08798894
0.7025.3688620.0818694
0.7035.3462930.07648279
0.7045.3248320.07172724
0.7055.3043940.06751705
0.7065.2849020.06377982
0.7075.2662870.06045416
0.7085.2484860.0574878
0.7095.2314390.05483608
0.715.2150950.05246071
0.7115.1994070.05032874
0.7125.184330.04841175
0.7135.1698240.04668511
0.7145.1558540.04512744
0.7155.1423870.04372012
0.7165.1293910.04244689
0.7175.1168390.04129352
0.7185.1047060.0402475
0.7195.0929670.03929784
0.725.0816030.03843485
0.7215.0705930.03764994
0.7225.0599190.03693551
0.7235.0495640.03628483
0.7245.0395150.0356919
0.7255.0297570.03515135
0.7265.0202820.0346584
0.7275.0110820.03420862
0.7285.0021560.03377889
0.7294.9934740.03335419
0.734.9850160.03293455
0.7314.9767680.03251999
0.7324.9687170.03211049
0.7334.9608530.03170603
0.7344.9531650.03130658
0.7354.9456450.03091211
0.7364.9382850.03052261
0.7374.9310780.03013801
0.7384.9240160.0297583
0.7394.9170940.02938343
0.744.9103050.02901337
0.7414.9036450.02864806
0.7424.8971090.02828748
0.7434.890690.02793158
0.7444.8843860.02758032
0.7454.8781920.02723366
0.7464.8721030.02689156
0.7474.8661170.02655397
0.7484.860230.02622085
0.7494.8544380.02589217
0.754.8487380.02556788
0.7514.8431280.02524794
0.7524.8376040.02493231
0.7534.8321640.02462095
0.7544.8268050.02431382
0.7554.8215250.02401088
0.7564.8163220.0237121
0.7574.8111920.02341743
0.7584.8061360.02312684
0.7594.8011490.02284028
0.764.7962310.02255773
0.7614.7913790.02227914
0.7624.7865920.02200448
0.7634.7818680.02173372
0.7644.7772050.02146681
0.7654.7726030.02120372
0.7664.7680580.02094441
0.7674.7635710.02068886
0.7684.759140.02043703
0.7694.7547630.02018889
0.774.7504390.01994439
0.7714.7461670.01970352
0.7724.7419450.01946623
0.7734.7377740.0192325
0.7744.7336510.0190023
0.7754.7295750.01877558
0.7764.7255460.01855233
0.7774.7215630.01833251
0.7784.7176250.0181161
0.7794.713730.01790305
0.784.709880.01769322
0.7814.7060710.01748598
0.7824.7023050.01728123
0.7834.6985780.01707897
0.7844.6948910.01687915
0.7854.6912430.01668177
0.7864.6876330.01648678
0.7874.6840610.01629418
0.7884.6805250.01610393
0.7894.6770240.01591601
0.794.6735590.01573041
0.7914.6701290.01554709
0.7924.6667320.01536604
0.7934.6633690.01518724
0.7944.6600380.01501065
0.7954.6567390.01483627
0.7964.6534720.01466407
0.7974.6502360.01449403
0.7984.6470310.01432613
0.7994.6438550.01416035
0.84.6407090.01399667
0.8014.6375930.01383507
0.8024.6345040.01367553
0.8034.6314440.01351803
0.8044.6284110.01336256
0.8054.6254060.01320909
0.8064.6224280.0130576
0.8074.6194760.01290808
0.8084.6165510.01276051
0.8094.6136510.01261478
0.814.6107770.01247047
0.8114.6079280.01232754
0.8124.6051040.01218597
0.8134.6023040.01204576
0.8144.5995280.01190688
0.8154.5967750.01176932
0.8164.5940450.01163308
0.8174.5913370.01149813
0.8184.5886520.01136447
0.8194.5859890.01123208
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0.8214.5807270.01097109
0.8224.5781280.01084245
0.8234.575550.01071504
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0.8254.5704540.01046386
0.8264.5679360.01034006
0.8274.5654370.01021745
0.8284.5629580.010096
0.8294.5604980.009975719
0.834.5580570.009856583
0.8314.5556340.009738587
0.8324.5532290.009621719
0.8334.5508430.009505969
0.8344.5484740.009391327
0.8354.5461230.009277783
0.8364.5437890.009165328
0.8374.5414730.009053951
0.8384.5391730.008943643
0.8394.536890.008834393
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0.8414.5323740.008619036
0.8424.530140.008512909
0.8434.5279210.008407805
0.8444.5257190.008303714
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0.8464.521360.008098537
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0.854.5128230.007699964
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0.8534.5065730.007411078
0.8544.5045170.007316653
0.8554.5024760.007223149
0.8564.5004480.00713056
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0.8584.4964320.006948093
0.8594.4944440.0068582
0.864.4924690.006769191
0.8614.4905080.006681059
0.8624.4885580.006593796
0.8634.4866220.006507395
0.8644.4846980.006421849
0.8654.4827860.006337151
0.8664.4808860.006253295
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0.874.4734080.005926145
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0.8744.4661150.00561192
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0.8764.4625360.005459527
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0.8794.4572490.005236697
0.884.4555080.005163932
0.8814.4537770.005091913
0.8824.4520570.005020634
0.8834.4503470.004950091
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0.8864.4452780.00474281
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0.8884.4419480.004608193
0.8894.4402980.004541939
0.894.4386570.004476381
0.8914.4370260.004411515
0.8924.4354050.004347334
0.8934.4337920.004283833
0.8944.4321890.004221007
0.8954.4305960.004158852
0.8964.4290110.004097362
0.8974.4274350.004036532
0.8984.4258680.003976358
0.8994.424310.003916834
0.94.4227610.003857956
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0.9024.4196890.003742118
0.9034.4181660.003685149
0.9044.4166510.003628807
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0.9064.4136460.003517986
0.9074.4121560.003463497
0.9084.4106750.003409618
0.9094.4092010.003356344
0.914.4077360.003303669
0.9114.4062780.003251591
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0.9414.3659520.001946708
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0.9454.3610280.001807484
0.9464.3598130.001773859
0.9474.3586030.0017407
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0.954.3550090.001643988
0.9514.3538230.001612663
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0.9544.3502990.001521384
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0.9574.3468260.001434089
0.9584.345680.001405863
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0.964.3434030.001350702
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0.9624.3411480.001297247
0.9634.3400290.001271151
0.9644.3389150.001245474
0.9654.3378060.001220213
0.9664.3367030.001195365
0.9674.3356040.001170927
0.9684.3345110.001146897
0.9694.3334230.001123272
0.974.332340.001100051
0.9714.3312620.00107723
0.9724.3301890.001054807
0.9734.3291210.00103278
0.9744.3280580.001011146
0.9754.3270.0009899035
0.9764.3259470.0009690491
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0.9784.3238560.0009284965
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0.984.3217830.0008894701
0.9814.3207540.0008705237
0.9824.319730.000851952
0.9834.318710.0008337528
0.9844.3176950.000815924
0.9854.3166850.0007984634
0.9864.3156790.0007813688
0.9874.3146780.000764638
0.9884.3136810.000748269
0.9894.3126890.0007322596
0.994.3117020.0007166077
0.9914.3107180.0007013112
0.9924.3097390.000686368
0.9934.3087650.0006717762
0.9944.3077950.0006575337
0.9954.306830.0006436384
0.9964.3058680.0006300885
0.9974.3049110.0006168818
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1.04.3020660.0005793021
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1.044.2675170.0003456251
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1.0454.2636130.00034013
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1.064.2523830.0003246259
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1.0654.2487910.000319762
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1.074.2452710.0003150394
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1.124.2135570.0002744399
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1.134.2078880.0002675381
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1.154.1971320.0002547259
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1.314.1320580.0001843598
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1.324.1289260.0001812481
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1.3254.1273910.0001797322
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1.334.1258780.0001782421
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1.3354.1243850.000176777
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1.344.1229120.0001753364
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1.354.1200240.0001725261
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1.374.1144730.0001671736
1.37254.11380.0001665284
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1.384.1118050.000164623
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1.394.1092040.000162151
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1.44.1066680.0001597541
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1.68254.0548360.0001130361
1.6854.0545040.0001127468
1.68754.0541730.0001124589
1.694.0538430.0001121726

Optical transmission calculator

Free-standing sample in vacuum, normal incidence
Method
Transmittance T
—
Reflectance R
—

Fresnel reflection calculator

Direction
Rp
—
Rs
—
R = (Rp+Rs)/2
—
Phase φp
—
Phase φs
—
Brewster angle θB
—
Critical angle θC
—