# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
# copyright and related rights waived via CC0 1.0

REFERENCES: |
    J. W. Weber, V. E. Calado, M. C. M. van de Sanden.
    Optical constants of graphene measured by spectroscopic ellipsometry.
    <a href="https://doi.org/10.1063/1.3475393"><i>Appl. Phys. Lett.</i> <b>97</b>, 091904 (2010)</a>
    (Numerical data kindly provided by Jan-Willem Weber)
COMMENTS: |
    Graphene (mechanically exfoliated flake). Thickness: 3.4 Å. Substrate: silicon with 98-nm silicon oxide layer.
DATA:
  - type: tabulated nk
    data: |
        0.210873 1.375211 0.376681
        0.212461 1.233285 0.414237
        0.214049 1.093820 0.480830
        0.215637 0.967508 0.578555
        0.217225 0.867752 0.701942
        0.218813 0.802065 0.836639
        0.220401 0.767137 0.968274
        0.221989 0.754486 1.089294
        0.223577 0.756332 1.197726
        0.225165 0.767087 1.294131
        0.226754 0.782927 1.379911
        0.228342 0.801160 1.456673
        0.229931 0.819756 1.526077
        0.231519 0.836991 1.589967
        0.233108 0.851791 1.651104
        0.234696 0.864904 1.711943
        0.236285 0.877507 1.773811
        0.237874 0.890763 1.837409
        0.239463 0.905741 1.903026
        0.241052 0.923382 1.970657
        0.242640 0.944492 2.040100
        0.244229 0.969740 2.111012
        0.245819 0.999672 2.182960
        0.247408 1.034733 2.255460
        0.248997 1.075284 2.327990
        0.250586 1.121632 2.400004
        0.252175 1.174059 2.470928
        0.253765 1.232852 2.540127
        0.255354 1.298372 2.606847
        0.256943 1.371078 2.669825
        0.258533 1.450405 2.727209
        0.260122 1.535076 2.777994
        0.261712 1.623904 2.821718
        0.263302 1.715860 2.858195
        0.264891 1.810047 2.887396
        0.266481 1.905687 2.909387
        0.268071 2.002100 2.924291
        0.269661 2.098684 2.932262
        0.271251 2.194901 2.933475
        0.272841 2.290263 2.928110
        0.274430 2.384315 2.916352
        0.276021 2.476634 2.898383
        0.277611 2.566801 2.874388
        0.279201 2.654409 2.844546
        0.280791 2.739040 2.809038
        0.282381 2.820250 2.768050
        0.283971 2.897544 2.721785
        0.285562 2.970329 2.670491
        0.287152 3.037802 2.614610
        0.288742 3.099367 2.555192
        0.290333 3.155035 2.493192
        0.291923 3.204948 2.429317
        0.293514 3.249283 2.364140
        0.295104 3.288237 2.298137
        0.296695 3.322008 2.231713
        0.298285 3.350793 2.165228
        0.299876 3.374787 2.098996
        0.301467 3.394179 2.033306
        0.303058 3.409157 1.968416
        0.304648 3.419905 1.904570
        0.306239 3.426604 1.841991
        0.307830 3.429435 1.780892
        0.309421 3.428580 1.721478
        0.311012 3.424220 1.663942
        0.312603 3.416545 1.608474
        0.314194 3.405748 1.555261
        0.315785 3.392035 1.504485
        0.317376 3.375623 1.456324
        0.318967 3.356748 1.410955
        0.320558 3.335672 1.368550
        0.322149 3.312693 1.329278
        0.323740 3.288158 1.293294
        0.325332 3.262518 1.260723
        0.326923 3.236321 1.231470
        0.328514 3.209916 1.205269
        0.330105 3.183530 1.181897
        0.331697 3.157339 1.161154
        0.333288 3.131487 1.142859
        0.334879 3.106097 1.126846
        0.336471 3.081272 1.112956
        0.338062 3.057103 1.101043
        0.339654 3.033665 1.090962
        0.341245 3.011024 1.082577
        0.342837 2.989235 1.075756
        0.344428 2.968344 1.070372
        0.346020 2.948390 1.066300
        0.347611 2.929399 1.063422
        0.349203 2.911396 1.061621
        0.350795 2.894394 1.060785
        0.352386 2.878400 1.060806
        0.353978 2.863415 1.061579
        0.355570 2.849432 1.063004
        0.357161 2.836441 1.064984
        0.358753 2.824424 1.067427
        0.360345 2.813356 1.070246
        0.361937 2.803211 1.073357
        0.363528 2.793955 1.076682
        0.365120 2.785550 1.080148
        0.366712 2.777954 1.083684
        0.368304 2.771121 1.087228
        0.369896 2.764999 1.090721
        0.371487 2.759534 1.094109
        0.373079 2.754663 1.097346
        0.374671 2.750319 1.100389
        0.376263 2.746420 1.103208
        0.377855 2.742879 1.105810
        0.379447 2.739641 1.108219
        0.381039 2.736668 1.110455
        0.382631 2.733927 1.112533
        0.384223 2.731393 1.114467
        0.385815 2.729043 1.116271
        0.387407 2.726859 1.117956
        0.388999 2.724823 1.119531
        0.390591 2.722921 1.121007
        0.392183 2.721140 1.122391
        0.393775 2.719469 1.123693
        0.395367 2.717896 1.124918
        0.396959 2.716414 1.126074
        0.398551 2.715013 1.127167
        0.400143 2.713686 1.128203
        0.401735 2.712428 1.129187
        0.403327 2.711231 1.130125
        0.404919 2.710090 1.131021
        0.406511 2.709001 1.131880
        0.408103 2.707959 1.132705
        0.409695 2.706960 1.133501
        0.411287 2.706001 1.134272
        0.412879 2.705078 1.135020
        0.414471 2.704189 1.135749
        0.416063 2.703330 1.136462
        0.417655 2.702499 1.137161
        0.419247 2.701695 1.137850
        0.420839 2.700915 1.138531
        0.422431 2.700157 1.139206
        0.424023 2.699420 1.139877
        0.425615 2.698703 1.140547
        0.427207 2.698004 1.141217
        0.428799 2.697321 1.141889
        0.430392 2.696655 1.142564
        0.431984 2.696004 1.143246
        0.433576 2.695367 1.143934
        0.435168 2.694744 1.144630
        0.436760 2.694134 1.145336
        0.438352 2.693536 1.146052
        0.439944 2.692950 1.146780
        0.441535 2.692376 1.147522
        0.443127 2.691813 1.148277
        0.444719 2.691262 1.149047
        0.446311 2.690720 1.149833
        0.447903 2.690190 1.150635
        0.449495 2.689670 1.151454
        0.451087 2.689161 1.152291
        0.452679 2.688662 1.153146
        0.454271 2.688173 1.154019
        0.455863 2.687694 1.154912
        0.457455 2.687226 1.155825
        0.459046 2.686767 1.156758
        0.460638 2.686319 1.157711
        0.462230 2.685882 1.158685
        0.463822 2.685455 1.159681
        0.465414 2.685038 1.160697
        0.467005 2.684632 1.161736
        0.468597 2.684237 1.162796
        0.470189 2.683852 1.163878
        0.471781 2.683479 1.164983
        0.473372 2.683116 1.166109
        0.474964 2.682765 1.167259
        0.476556 2.682425 1.168430
        0.478147 2.682098 1.169624
        0.479739 2.681782 1.170841
        0.481330 2.681478 1.172081
        0.482922 2.681185 1.173343
        0.484513 2.680906 1.174627
        0.486105 2.680639 1.175935
        0.487696 2.680385 1.177264
        0.489288 2.680144 1.178616
        0.490879 2.679917 1.179991
        0.492471 2.679702 1.181388
        0.494062 2.679502 1.182807
        0.495654 2.679315 1.184248
        0.497245 2.679142 1.185710
        0.498836 2.678984 1.187195
        0.500427 2.678840 1.188701
        0.502019 2.678711 1.190229
        0.503610 2.678596 1.191777
        0.505201 2.678498 1.193347
        0.506792 2.678414 1.194938
        0.508383 2.678346 1.196549
        0.509974 2.678293 1.198181
        0.511566 2.678257 1.199833
        0.513157 2.678237 1.201505
        0.514748 2.678233 1.203196
        0.516339 2.678246 1.204907
        0.517929 2.678276 1.206637
        0.519520 2.678323 1.208386
        0.521111 2.678386 1.210154
        0.522702 2.678468 1.211941
        0.524293 2.678567 1.213745
        0.525883 2.678684 1.215567
        0.527474 2.678819 1.217407
        0.529065 2.678972 1.219264
        0.530656 2.679144 1.221138
        0.532246 2.679335 1.223028
        0.533837 2.679545 1.224935
        0.535427 2.679773 1.226858
        0.537018 2.680022 1.228796
        0.538608 2.680290 1.230750
        0.540198 2.680577 1.232719
        0.541789 2.680885 1.234702
        0.543379 2.681214 1.236700
        0.544969 2.681563 1.238711
        0.546560 2.681934 1.240736
        0.548150 2.682326 1.242773
        0.549740 2.682741 1.244822
        0.551330 2.683177 1.246882
        0.552920 2.683636 1.248952
        0.554510 2.684117 1.251031
        0.556100 2.684619 1.253119
        0.557690 2.685144 1.255216
        0.559280 2.685690 1.257319
        0.560869 2.686258 1.259430
        0.562459 2.686847 1.261546
        0.564049 2.687457 1.263669
        0.565639 2.688088 1.265796
        0.567228 2.688739 1.267928
        0.568818 2.689411 1.270064
        0.570407 2.690104 1.272204
        0.571997 2.690816 1.274348
        0.573586 2.691548 1.276493
        0.575175 2.692299 1.278642
        0.576765 2.693070 1.280792
        0.578354 2.693859 1.282943
        0.579943 2.694667 1.285096
        0.581532 2.695493 1.287250
        0.583121 2.696337 1.289404
        0.584710 2.697200 1.291558
        0.586299 2.698079 1.293712
        0.587888 2.698976 1.295865
        0.589477 2.699889 1.298017
        0.591066 2.700819 1.300169
        0.592654 2.701765 1.302318
        0.594243 2.702727 1.304466
        0.595831 2.703705 1.306612
        0.597420 2.704698 1.308756
        0.599008 2.705707 1.310897
        0.600597 2.706730 1.313036
        0.602185 2.707767 1.315171
        0.603773 2.708819 1.317304
        0.605362 2.709885 1.319433
        0.606950 2.710964 1.321558
        0.608538 2.712056 1.323680
        0.610126 2.713162 1.325798
        0.611714 2.714280 1.327912
        0.613302 2.715410 1.330021
        0.614890 2.716553 1.332126
        0.616477 2.717708 1.334227
        0.618065 2.718874 1.336322
        0.619653 2.720051 1.338413
        0.621240 2.721240 1.340499
        0.622828 2.722439 1.342580
        0.624415 2.723648 1.344655
        0.626002 2.724868 1.346726
        0.627590 2.726097 1.348790
        0.629177 2.727336 1.350850
        0.630764 2.728585 1.352903
        0.632351 2.729842 1.354951
        0.633938 2.731108 1.356993
        0.635525 2.732383 1.359029
        0.637112 2.733666 1.361060
        0.638698 2.734957 1.363084
        0.640285 2.736255 1.365102
        0.641872 2.737561 1.367114
        0.643458 2.738874 1.369119
        0.645045 2.740195 1.371119
        0.646631 2.741521 1.373112
        0.648217 2.742854 1.375099
        0.649804 2.744194 1.377079
        0.651390 2.745539 1.379054
        0.652976 2.746890 1.381021
        0.654562 2.748246 1.382982
        0.656148 2.749607 1.384937
        0.657733 2.750973 1.386886
        0.659319 2.752344 1.388827
        0.660905 2.753719 1.390763
        0.662490 2.755099 1.392691
        0.664076 2.756482 1.394614
        0.665661 2.757869 1.396530
        0.667246 2.759259 1.398439
        0.668832 2.760652 1.400342
        0.670417 2.762049 1.402238
        0.672002 2.763448 1.404128
        0.673587 2.764849 1.406011
        0.675172 2.766252 1.407888
        0.676756 2.767658 1.409759
        0.678341 2.769065 1.411624
        0.679926 2.770473 1.413482
        0.681510 2.771883 1.415334
        0.683095 2.773293 1.417179
        0.684679 2.774705 1.419019
        0.686263 2.776116 1.420852
        0.687848 2.777528 1.422679
        0.689432 2.778939 1.424501
        0.691016 2.780350 1.426316
        0.692599 2.781761 1.428126
        0.694183 2.783170 1.429930
        0.695767 2.784579 1.431728
        0.697350 2.785985 1.433521
        0.698934 2.787390 1.435308
        0.700517 2.788792 1.437090
        0.702101 2.790192 1.438867
        0.703684 2.791589 1.440638
        0.705267 2.792983 1.442405
        0.706850 2.794372 1.444167
        0.708433 2.795757 1.445925
        0.710016 2.797137 1.447680
        0.711599 2.798513 1.449432
        0.713181 2.799883 1.451182
        0.714764 2.801249 1.452929
        0.716346 2.802609 1.454676
        0.717928 2.803964 1.456421
        0.719511 2.805315 1.458166
        0.721093 2.806660 1.459910
        0.722675 2.808001 1.461655
        0.724257 2.809337 1.463400
        0.725839 2.810668 1.465146
        0.727420 2.811995 1.466893
        0.729002 2.813317 1.468642
        0.730583 2.814635 1.470392
        0.732165 2.815949 1.472144
        0.733746 2.817259 1.473899
        0.735327 2.818565 1.475656
        0.736908 2.819867 1.477415
        0.738489 2.821166 1.479178
        0.740070 2.822461 1.480944
        0.741651 2.823754 1.482713
        0.743231 2.825042 1.484485
        0.744812 2.826329 1.486261
        0.746392 2.827612 1.488041
        0.747972 2.828893 1.489825
        0.749553 2.830171 1.491613
        0.751133 2.831447 1.493405
        0.752713 2.832721 1.495202
        0.754292 2.833993 1.497003
        0.755872 2.835263 1.498808
        0.757452 2.836532 1.500619
        0.759031 2.837800 1.502434
        0.760611 2.839066 1.504254
        0.762190 2.840331 1.506079
        0.763769 2.841595 1.507909
        0.765348 2.842858 1.509745
        0.766927 2.844121 1.511585
        0.768506 2.845383 1.513431
        0.770084 2.846646 1.515282
        0.771663 2.847908 1.517139
        0.773241 2.849170 1.519001
        0.774820 2.850432 1.520868
        0.776398 2.851695 1.522741
        0.777976 2.852958 1.524620
        0.779554 2.854223 1.526504
        0.781132 2.855488 1.528393
        0.782709 2.856754 1.530289
        0.784287 2.858021 1.532189
        0.785864 2.859289 1.534096
        0.787442 2.860559 1.536008
        0.789019 2.861831 1.537926
        0.790596 2.863105 1.539849
        0.792173 2.864380 1.541778
        0.793750 2.865658 1.543713
        0.795326 2.866937 1.545653
        0.796903 2.868219 1.547599
        0.798479 2.869504 1.549551
        0.800056 2.870791 1.551508
        0.801632 2.872081 1.553470
        0.803208 2.873374 1.555438
        0.804784 2.874670 1.557412
        0.806360 2.875969 1.559391
        0.807935 2.877271 1.561375
        0.809511 2.878577 1.563365
        0.811086 2.879886 1.565361
        0.812661 2.881199 1.567361
        0.814236 2.882515 1.569367
        0.815811 2.883836 1.571378
        0.817386 2.885160 1.573394
        0.818961 2.886489 1.575416
        0.820536 2.887821 1.577442
        0.822110 2.889158 1.579474
        0.823684 2.890500 1.581510
        0.825258 2.891846 1.583552
        0.826832 2.893197 1.585598
        0.828406 2.894552 1.587649
        0.829980 2.895912 1.589705
        0.831554 2.897278 1.591766
        0.833127 2.898648 1.593832
        0.834700 2.900023 1.595901
        0.836274 2.901404 1.597976
        0.837847 2.902790 1.600055
        0.839419 2.904181 1.602138
        0.840992 2.905578 1.604226
        0.842565 2.906980 1.606318
        0.844137 2.908388 1.608414
        0.845710 2.909802 1.610515
        0.847282 2.911222 1.612619
        0.848854 2.912647 1.614727
        0.850426 2.914078 1.616839
        0.851997 2.915516 1.618956
        0.853569 2.916960 1.621076
        0.855140 2.918409 1.623199
        0.856712 2.919866 1.625327
        0.858283 2.921328 1.627457
        0.859854 2.922797 1.629591
        0.861425 2.924272 1.631729
        0.862995 2.925754 1.633870
        0.864566 2.927243 1.636015
        0.866136 2.928738 1.638162
        0.867706 2.930239 1.640313
        0.869276 2.931748 1.642466
        0.870846 2.933264 1.644623
        0.872416 2.934786 1.646782
        0.873986 2.936315 1.648944
        0.875555 2.937852 1.651109
        0.877125 2.939395 1.653277
        0.878694 2.940946 1.655447
        0.880263 2.942503 1.657620
        0.881832 2.944068 1.659795
        0.883400 2.945641 1.661972
        0.884969 2.947220 1.664151
        0.886537 2.948807 1.666333
        0.888105 2.950401 1.668517
        0.889673 2.952003 1.670702
        0.891241 2.953612 1.672890
        0.892809 2.955228 1.675080
        0.894376 2.956852 1.677271
        0.895944 2.958484 1.679464
        0.897511 2.960124 1.681659
        0.899078 2.961771 1.683855
        0.900645 2.963425 1.686052
        0.902212 2.965088 1.688251
        0.903778 2.966758 1.690451
        0.905345 2.968436 1.692652
        0.906911 2.970122 1.694855
        0.908477 2.971816 1.697058
        0.910043 2.973517 1.699263
        0.911609 2.975227 1.701468
        0.913174 2.976944 1.703674
        0.914740 2.978670 1.705881
        0.916305 2.980403 1.708089
        0.917870 2.982145 1.710297
        0.919435 2.983894 1.712505
        0.921000 2.985652 1.714715
        0.922564 2.987417 1.716924
        0.924129 2.989191 1.719133
        0.925693 2.990973 1.721343
        0.927257 2.992763 1.723553
        0.928821 2.994561 1.725763
        0.930384 2.996368 1.727973
        0.931948 2.998183 1.730183
        0.933511 3.000005 1.732392
        0.935074 3.001837 1.734601
        0.936637 3.003676 1.736810
        0.938200 3.005524 1.739018
        0.939763 3.007380 1.741227
        0.941325 3.009244 1.743434
        0.942888 3.011117 1.745640
        0.944450 3.012998 1.747846
        0.946012 3.014888 1.750051
        0.947573 3.016786 1.752256
        0.949135 3.018692 1.754459
        0.950696 3.020607 1.756661
        0.952258 3.022530 1.758862
        0.953819 3.024461 1.761062
        0.955379 3.026402 1.763261
        0.956940 3.028350 1.765458
        0.958501 3.030307 1.767654
        0.960061 3.032273 1.769848
        0.961621 3.034247 1.772041
        0.963181 3.036229 1.774232
        0.964741 3.038220 1.776422
        0.966300 3.040220 1.778610
        0.967859 3.042228 1.780795
        0.969419 3.044245 1.782979
        0.970978 3.046271 1.785161
        0.972536 3.048305 1.787341
        0.974095 3.050348 1.789519
        0.975654 3.052400 1.791694
        0.977212 3.054460 1.793867
        0.978770 3.056529 1.796038
        0.980328 3.058607 1.798206
        0.981885 3.060694 1.800372
        0.983443 3.062789 1.802535
        0.985000 3.064893 1.804695
        0.986557 3.067006 1.806853
        0.988114 3.069128 1.809008
        0.989671 3.071259 1.811159
        0.991227 3.073399 1.813308
        0.992784 3.075548 1.815454
        0.994340 3.077706 1.817596
        0.995896 3.079873 1.819735
        0.997451 3.082050 1.821871
        0.999007 3.084235 1.824003
CONDITIONS:
    substrate: Si
    film_thickness: 1L