Optical constants

Refractive index of WSe2 (Tungsten diselenide)

Ermolaev et al. 2021: monolayer (1L) film; n,k 0.30–1.70 µm

Data
tabulated nk
Range
0.301–1.7 µm
Points
1400
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.301–1.7 µm
Refractive index n
4.08759
Extinction coefficient k
0.359328
Permittivity ε1
16.5792
Permittivity ε2
2.93757
Absorption coefficient α
76845.6 cm⁻¹
Penetration depth δ = λ/(2πk)
260.262 nm
Abbe number Vd
—
Chromatic dispersion dn/dλ
-8.89 µm⁻¹
Group index ng
9.31135
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

# WSe2 (Tungsten diselenide): Ermolaev et al. 2021: monolayer (1L) film; n,k 0.30–1.70 µm
wse2 = ls.fetch_refractiveindex("main", "WSe2", "Ermolaev", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(wse2.range_nm)  # (301, 1700) nm
eps = wse2.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

CVD-grown monolayer.

Conditions

film thickness
1L
substrate
SiO2/Si

References

G.A. Ermolaev, D.I. Yakubovsky, Y.V. Stebunov, A.A. Voronov, A.V. Arsenin, V.S. Volkov. Spectroscopic ellipsometry of large area monolayer WS2 and WSe2 films. AIP Conf. Proc. 2359, 020005 (2021) (Numerical data kindly provided by Dr. Georgy Ermolaev)
  • doi:10.1063/5.0054947 Spectroscopic ellipsometry of large area monolayer WS2 and WSe2 films, AIP Conference Proceedings (2021)

Cite

G. A. Ermolaev et al.. Spectroscopic ellipsometry of large area monolayer WS2 and WSe2 films. AIP Conference Proceedings, 2359, 020005 (2021), doi:10.1063/5.0054947; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

1400 rows as published
WSe2 (Tungsten diselenide), Ermolaev et al. 2021: monolayer (1L) film; n,k 0.30–1.70 µm: n and k versus wavelength
λ (µm)nk
0.3011.606891.55452
0.3021.610051.56743
0.3031.613271.58045
0.3041.616541.59357
0.3051.619881.6068
0.3061.623271.62015
0.3071.626721.63362
0.3081.630231.64721
0.3091.63381.66093
0.311.637431.67479
0.3111.641131.68879
0.3121.64491.70294
0.3131.648731.71724
0.3141.652631.73171
0.3151.656611.74635
0.3161.660661.76116
0.3171.664791.77616
0.3181.6691.79135
0.3191.67331.80674
0.321.677681.82235
0.3211.682161.83818
0.3221.686741.85424
0.3231.691421.87054
0.3241.696221.88711
0.3251.701131.90394
0.3261.706161.92106
0.3271.711321.93847
0.3281.716631.95619
0.3291.722091.97425
0.331.727711.99265
0.3311.733512.01141
0.3321.739492.03055
0.3331.745682.0501
0.3341.752092.07007
0.3351.758742.09049
0.3361.765652.11137
0.3371.772852.13276
0.3381.780362.15466
0.3391.788222.17712
0.341.796452.20016
0.3411.805092.22381
0.3421.81422.24811
0.3431.823812.27309
0.3441.833972.29878
0.3451.844762.32522
0.3461.856242.35245
0.3471.868492.38051
0.3481.88162.40943
0.3491.895662.43926
0.351.91082.47003
0.3511.927142.50176
0.3521.944842.53449
0.3531.964042.56824
0.3541.984952.60302
0.3552.007782.63882
0.3562.032762.67563
0.3572.060172.71339
0.3582.09032.75202
0.3592.123492.79141
0.362.16012.83138
0.3612.200512.87167
0.3622.245152.91197
0.3632.294452.95182
0.3642.348812.99068
0.3652.408643.02782
0.3662.474233.06236
0.3672.545773.09326
0.3682.623263.11927
0.3692.706433.13901
0.372.794623.15101
0.3712.886783.15381
0.3722.981363.14609
0.3733.076363.12687
0.3743.169393.09571
0.3753.257873.0528
0.3763.339252.99913
0.3773.411322.9364
0.3783.472442.86686
0.3793.521692.79312
0.383.558932.71783
0.3813.584712.64341
0.3823.600112.57191
0.3833.606552.50488
0.3843.605622.44339
0.3853.59892.38804
0.3863.587882.33905
0.3873.573872.29636
0.3883.5582.25971
0.3893.54122.22871
0.393.524232.2029
0.3913.507672.18177
0.3923.491982.16482
0.3933.47752.15156
0.3943.464482.14154
0.3953.453092.13433
0.3963.443462.12953
0.3973.435642.12678
0.3983.429692.12578
0.3993.42562.12621
0.43.423382.12782
0.4013.422992.13037
0.4023.424412.13364
0.4033.427592.13744
0.4043.432472.14158
0.4053.439012.1459
0.4063.447142.15025
0.4073.45682.15448
0.4083.467922.15846
0.4093.480422.16207
0.413.494252.16519
0.4113.509312.16771
0.4123.525522.16953
0.4133.542812.17055
0.4143.561062.17069
0.4153.58022.16987
0.4163.600122.168
0.4173.620712.16502
0.4183.641862.16087
0.4193.663462.1555
0.423.685392.14887
0.4213.707512.14094
0.4223.729722.13171
0.4233.751872.12116
0.4243.773842.10929
0.4253.795512.09613
0.4263.816742.08171
0.4273.837412.06607
0.4283.857412.04926
0.4293.876632.03136
0.433.894962.01244
0.4313.912321.99259
0.4323.928621.97192
0.4333.94381.95052
0.4343.957791.92852
0.4353.970561.90602
0.4363.982081.88314
0.4373.992331.86
0.4384.00131.83672
0.4394.009021.81341
0.444.01551.79018
0.4414.020771.76713
0.4424.024871.74436
0.4434.027861.72197
0.4444.029791.70002
0.4454.030721.67859
0.4464.030721.65775
0.4474.029871.63754
0.4484.028231.61802
0.4494.025881.59923
0.454.022891.58118
0.4514.019331.56391
0.4524.015271.54743
0.4534.010791.53175
0.4544.005941.51686
0.4554.00081.50278
0.4563.995421.48948
0.4573.989861.47696
0.4583.984171.46521
0.4593.97841.45421
0.463.97261.44394
0.4613.966811.43438
0.4623.961071.4255
0.4633.955421.41729
0.4643.949891.40971
0.4653.944511.40275
0.4663.939311.39637
0.4673.934311.39056
0.4683.929541.38528
0.4693.925021.38051
0.473.920771.37623
0.4713.91681.37241
0.4723.913131.36903
0.4733.909781.36607
0.4743.906761.3635
0.4753.904091.3613
0.4763.901771.35945
0.4773.899821.35792
0.4783.898241.35671
0.4793.897061.35578
0.483.896281.35512
0.4813.895911.3547
0.4823.895961.35452
0.4833.896451.35454
0.4843.897381.35475
0.4853.898771.35512
0.4863.900641.35565
0.4873.902981.35629
0.4883.905831.35704
0.4893.909191.35786
0.493.913071.35873
0.4913.91751.35962
0.4923.922491.3605
0.4933.928041.36132
0.4943.934191.36206
0.4953.940941.36268
0.4963.948291.36311
0.4973.956281.36332
0.4983.964881.36324
0.4993.974121.36282
0.53.983981.36199
0.5013.994461.36066
0.5024.005521.35878
0.5034.017151.35626
0.5044.02931.35302
0.5054.04191.34897
0.5064.054891.34404
0.5074.068191.33816
0.5084.081681.33127
0.5094.095251.32332
0.514.108781.31427
0.5114.122111.30411
0.5124.135111.29286
0.5134.147631.28055
0.5144.159521.26725
0.5154.170671.25305
0.5164.180951.23806
0.5174.190281.22242
0.5184.198591.20626
0.5194.205851.18975
0.524.212051.17303
0.5214.217211.15624
0.5224.221371.13954
0.5234.22461.12303
0.5244.226991.10681
0.5254.228621.09098
0.5264.229591.07558
0.5274.231.06066
0.5284.229951.04624
0.5294.229531.03234
0.534.228831.01893
0.5314.227941.00601
0.5324.226920.99352
0.5334.22580.98143
0.5344.224650.96972
0.5354.223490.95835
0.5364.222360.94727
0.5374.221270.93645
0.5384.220250.92585
0.5394.21930.91544
0.544.218440.90519
0.5414.217670.89505
0.5424.216980.88499
0.5434.216380.875
0.5444.215850.86505
0.5454.215390.85511
0.5464.214990.84516
0.5474.214640.83519
0.5484.214320.82517
0.5494.214030.81509
0.554.213750.80495
0.5514.213480.79473
0.5524.213180.78441
0.5534.212860.774
0.5544.21250.76349
0.5554.212090.75286
0.5564.21160.74213
0.5574.211040.73128
0.5584.210390.72031
0.5594.209640.70923
0.564.208780.69802
0.5614.207820.68669
0.5624.206720.6752
0.5634.205460.66356
0.5644.204020.65177
0.5654.202360.63985
0.5664.200490.62781
0.5674.198390.61566
0.5684.196040.6034
0.5694.193430.59104
0.574.190560.5786
0.5714.18740.56609
0.5724.183960.55352
0.5734.180220.5409
0.5744.176180.52824
0.5754.171820.51555
0.5764.167130.50285
0.5774.162130.49015
0.5784.156780.47747
0.5794.15110.46481
0.584.145070.4522
0.5814.138690.43964
0.5824.131960.42716
0.5834.124870.41476
0.5844.117430.40246
0.5854.109620.39029
0.5864.101450.37825
0.5874.092920.36636
0.5884.084030.35464
0.5894.074780.34311
0.594.065170.33179
0.5914.055210.32068
0.5924.044890.30981
0.5934.034240.2992
0.5944.023240.28886
0.5954.011910.27882
0.5964.000260.26908
0.5973.988290.25967
0.5983.976010.25061
0.5993.963450.24191
0.63.95060.23359
0.6013.937470.22566
0.6023.92410.21815
0.6033.910490.21107
0.6043.896650.20444
0.6053.882610.19827
0.6063.868380.19257
0.6073.853990.18737
0.6083.839450.18268
0.6093.82480.1785
0.613.810050.17486
0.6113.795240.17177
0.6123.780390.16923
0.6133.765540.16726
0.6143.750710.16588
0.6153.735950.16508
0.6163.721310.16488
0.6173.706810.16528
0.6183.692530.16629
0.6193.678530.16791
0.623.664890.17014
0.6213.651770.17299
0.6223.639420.17619
0.6233.627630.17944
0.6243.616250.18273
0.6253.60520.18608
0.6263.594450.18948
0.6273.583960.19294
0.6283.57370.19646
0.6293.563660.20004
0.633.553820.20368
0.6313.544160.20739
0.6323.534670.21117
0.6333.525350.21501
0.6343.516180.21893
0.6353.507150.22292
0.6363.498260.22698
0.6373.489510.23112
0.6383.480880.23534
0.6393.472370.23964
0.643.463980.24402
0.6413.45570.24848
0.6423.447530.25302
0.6433.439470.25766
0.6443.431520.26238
0.6453.423670.26719
0.6463.415910.27209
0.6473.408260.27709
0.6483.400710.28218
0.6493.393250.28737
0.653.385890.29265
0.6513.378630.29804
0.6523.371460.30353
0.6533.364390.30913
0.6543.357410.31483
0.6553.350530.32064
0.6563.343740.32656
0.6573.337050.33259
0.6583.330460.33874
0.6593.323970.345
0.663.317590.35137
0.6613.31130.35787
0.6623.305120.36448
0.6633.299050.37122
0.6643.293080.37808
0.6653.287230.38506
0.6663.281490.39217
0.6673.275860.39941
0.6683.270360.40677
0.6693.264980.41426
0.673.259720.42188
0.6713.254590.42964
0.6723.24960.43752
0.6733.244750.44554
0.6743.240030.45369
0.6753.235460.46198
0.6763.231050.4704
0.6773.226780.47895
0.6783.222680.48764
0.6793.218740.49645
0.683.214970.50541
0.6813.211380.51449
0.6823.207970.5237
0.6833.204740.53305
0.6843.201710.54252
0.6853.198870.55212
0.6863.196240.56184
0.6873.193810.57168
0.6883.19160.58165
0.6893.189620.59173
0.693.187860.60192
0.6913.186340.61222
0.6923.185060.62263
0.6933.184030.63314
0.6943.183250.64374
0.6953.182730.65444
0.6963.182480.66522
0.6973.18250.67608
0.6983.18280.68701
0.6993.183390.69801
0.73.184260.70907
0.7013.185440.72018
0.7023.186910.73133
0.7033.188690.74252
0.7043.190790.75374
0.7053.19320.76497
0.7063.195940.77622
0.7073.1990.78746
0.7083.202390.79868
0.7093.206110.80989
0.713.210170.82106
0.7113.214570.83218
0.7123.219310.84325
0.7133.224390.85424
0.7143.229810.86516
0.7153.235580.87598
0.7163.241690.8867
0.7173.248140.89729
0.7183.254930.90776
0.7193.262070.91808
0.723.269540.92824
0.7213.277340.93823
0.7223.285470.94803
0.7233.293930.95764
0.7243.302710.96703
0.7253.31180.9762
0.7263.32120.98514
0.7273.33090.99383
0.7283.34091.00225
0.7293.351171.0104
0.733.361731.01827
0.7313.372541.02584
0.7323.383611.03311
0.7333.394931.04006
0.7343.406481.04668
0.7353.418241.05296
0.7363.430221.0589
0.7373.442381.06448
0.7383.454731.0697
0.7393.467251.07456
0.743.479911.07904
0.7413.492721.08314
0.7423.505651.08685
0.7433.518681.09018
0.7443.531811.09311
0.7453.545011.09565
0.7463.558281.09779
0.7473.571591.09954
0.7483.584931.10088
0.7493.598291.10183
0.753.611641.10238
0.7513.624981.10254
0.7523.638281.10231
0.7533.651541.10168
0.7543.664741.10068
0.7553.677871.0993
0.7563.69091.09754
0.7573.703831.09542
0.7583.716641.09294
0.7593.729331.09011
0.763.741871.08693
0.7613.754261.08342
0.7623.766491.07958
0.7633.778541.07543
0.7643.79041.07096
0.7653.802081.06621
0.7663.813551.06116
0.7673.824811.05584
0.7683.835851.05026
0.7693.846661.04442
0.773.857251.03834
0.7713.867591.03203
0.7723.87771.0255
0.7733.887551.01876
0.7743.897161.01183
0.7753.906521.00472
0.7763.915610.99743
0.7773.924450.98998
0.7783.933030.98238
0.7793.941350.97464
0.783.949410.96678
0.7813.957210.95879
0.7823.964740.9507
0.7833.972020.94252
0.7843.979030.93424
0.7853.985790.92589
0.7863.99230.91747
0.7873.998550.909
0.7884.004550.90047
0.7894.010310.89191
0.794.015820.88331
0.7914.021090.87469
0.7924.026120.86604
0.7934.030920.85739
0.7944.035490.84874
0.7954.039840.84009
0.7964.043970.83145
0.7974.047880.82283
0.7984.051580.81422
0.7994.055080.80565
0.84.058370.7971
0.8014.061460.7886
0.8024.064370.78013
0.8034.067090.77171
0.8044.069620.76334
0.8054.071980.75502
0.8064.074160.74676
0.8074.076180.73856
0.8084.078030.73042
0.8094.079730.72234
0.814.081270.71434
0.8114.082670.7064
0.8124.083920.69853
0.8134.085030.69074
0.8144.0860.68302
0.8154.086850.67539
0.8164.087570.66782
0.8174.088160.66034
0.8184.088640.65294
0.8194.089010.64562
0.824.089260.63838
0.8214.089410.63123
0.8224.089460.62416
0.8234.089410.61717
0.8244.089270.61026
0.8254.089030.60344
0.8264.088710.59671
0.8274.08830.59006
0.8284.087810.58349
0.8294.087250.577
0.834.086610.5706
0.8314.085890.56429
0.8324.085110.55805
0.8334.084270.5519
0.8344.083360.54583
0.8354.082390.53984
0.8364.081360.53393
0.8374.080280.52811
0.8384.079140.52236
0.8394.077960.51669
0.844.076720.5111
0.8414.075440.50559
0.8424.074120.50015
0.8434.072750.49479
0.8444.071350.48951
0.8454.06990.4843
0.8464.068420.47916
0.8474.066910.4741
0.8484.065360.4691
0.8494.063780.46418
0.854.062170.45933
0.8514.060540.45455
0.8524.058880.44983
0.8534.057190.44519
0.8544.055480.44061
0.8554.053750.43609
0.8564.0520.43164
0.8574.050220.42725
0.8584.048430.42293
0.8594.046620.41867
0.864.04480.41447
0.8614.042960.41033
0.8624.04110.40624
0.8634.039230.40222
0.8644.037350.39825
0.8654.035460.39434
0.8664.033560.39049
0.8674.031650.38669
0.8684.029730.38295
0.8694.02780.37925
0.874.025860.37562
0.8714.023920.37203
0.8724.021970.36849
0.8734.020020.365
0.8744.018060.36156
0.8754.01610.35817
0.8764.014130.35483
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1.5273.543430.03665
1.5283.543230.0366
1.5293.543030.03654
1.533.542840.03649
1.5313.542640.03644
1.5323.542450.03639
1.5333.542250.03634
1.5343.542050.03629
1.5353.541860.03624
1.5363.541670.03619
1.5373.541470.03614
1.5383.541280.03608
1.5393.541090.03603
1.543.540890.03598
1.5413.54070.03593
1.5423.540510.03588
1.5433.540320.03583
1.5443.540130.03579
1.5453.539940.03574
1.5463.539750.03569
1.5473.539560.03564
1.5483.539370.03559
1.5493.539180.03554
1.553.5390.03549
1.5513.538810.03544
1.5523.538620.03539
1.5533.538440.03535
1.5543.538250.0353
1.5553.538060.03525
1.5563.537880.0352
1.5573.537690.03515
1.5583.537510.03511
1.5593.537330.03506
1.563.537140.03501
1.5613.536960.03496
1.5623.536780.03492
1.5633.53660.03487
1.5643.536410.03482
1.5653.536230.03478
1.5663.536050.03473
1.5673.535870.03468
1.5683.535690.03464
1.5693.535510.03459
1.573.535330.03455
1.5713.535160.0345
1.5723.534980.03445
1.5733.53480.03441
1.5743.534620.03436
1.5753.534450.03432
1.5763.534270.03427
1.5773.534090.03423
1.5783.533920.03418
1.5793.533740.03414
1.583.533570.03409
1.5813.533390.03405
1.5823.533220.034
1.5833.533040.03396
1.5843.532870.03392
1.5853.53270.03387
1.5863.532530.03383
1.5873.532350.03378
1.5883.532180.03374
1.5893.532010.0337
1.593.531840.03365
1.5913.531670.03361
1.5923.53150.03357
1.5933.531330.03352
1.5943.531160.03348
1.5953.530990.03344
1.5963.530820.03339
1.5973.530650.03335
1.5983.530490.03331
1.5993.530320.03327
1.63.530150.03322
1.6013.529980.03318
1.6023.529820.03314
1.6033.529650.0331
1.6043.529490.03306
1.6053.529320.03301
1.6063.529160.03297
1.6073.528990.03293
1.6083.528830.03289
1.6093.528660.03285
1.613.52850.03281
1.6113.528340.03277
1.6123.528180.03273
1.6133.528010.03268
1.6143.527850.03264
1.6153.527690.0326
1.6163.527530.03256
1.6173.527370.03252
1.6183.527210.03248
1.6193.527050.03244
1.623.526890.0324
1.6213.526730.03236
1.6223.526570.03232
1.6233.526410.03228
1.6243.526250.03224
1.6253.526090.0322
1.6263.525940.03216
1.6273.525780.03212
1.6283.525620.03208
1.6293.525470.03205
1.633.525310.03201
1.6313.525150.03197
1.6323.5250.03193
1.6333.524840.03189
1.6343.524690.03185
1.6353.524530.03181
1.6363.524380.03177
1.6373.524230.03174
1.6383.524070.0317
1.6393.523920.03166
1.643.523770.03162
1.6413.523610.03158
1.6423.523460.03154
1.6433.523310.03151
1.6443.523160.03147
1.6453.523010.03143
1.6463.522860.03139
1.6473.522710.03136
1.6483.522560.03132
1.6493.522410.03128
1.653.522260.03124
1.6513.522110.03121
1.6523.521960.03117
1.6533.521810.03113
1.6543.521660.0311
1.6553.521510.03106
1.6563.521370.03102
1.6573.521220.03099
1.6583.521070.03095
1.6593.520930.03091
1.663.520780.03088
1.6613.520630.03084
1.6623.520490.03081
1.6633.520340.03077
1.6643.52020.03073
1.6653.520050.0307
1.6663.519910.03066
1.6673.519760.03063
1.6683.519620.03059
1.6693.519480.03056
1.673.519330.03052
1.6713.519190.03049
1.6723.519050.03045
1.6733.518910.03042
1.6743.518760.03038
1.6753.518620.03035
1.6763.518480.03031
1.6773.518340.03028
1.6783.51820.03024
1.6793.518060.03021
1.683.517920.03017
1.6813.517780.03014
1.6823.517640.0301
1.6833.51750.03007
1.6843.517360.03004
1.6853.517220.03
1.6863.517080.02997
1.6873.516950.02993
1.6883.516810.0299
1.6893.516670.02987
1.693.516530.02983
1.6913.51640.0298
1.6923.516260.02977
1.6933.516120.02973
1.6943.515990.0297
1.6953.515850.02967
1.6963.515720.02963
1.6973.515580.0296
1.6983.515450.02957
1.6993.515310.02953
1.73.515180.0295

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
—