Optical constants

Refractive index of N-SK14 (SCHOTT)

N-SK14: n,k 0.31–2.5 µm

Data
formula 2 + tabulated k
Range
0.31–2.5 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.31–2.5 µm
Refractive index n
1.60311
Extinction coefficient k
9.37538e-09
Permittivity ε1
2.56996
Permittivity ε2
3.00595e-08
Absorption coefficient α
0.00200501 cm⁻¹
Penetration depth δ = λ/(2πk)
9.97501e+09 nm
Abbe number Vd
60.597
Chromatic dispersion dn/dλ
-0.0514603 µm⁻¹
Group index ng
1.63335
Group velocity dispersion
89.4287 fs²/mm
Dispersion parameter D
-487.881 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

# N-SK14 (SCHOTT): N-SK14
schott_n_sk14 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "N-SK14", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_n_sk14.range_nm)  # (310, 2500) nm
eps = schott_n_sk14.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.

Dispersion formula

Sellmeier (C in µm²) (formula 2), λ in µm
n2−1=0.936155374λ2λ2−0.00461716525+0.594052018λ2λ2−0.016885927+1.04374583λ2λ2−103.736265

Valid from 0.31 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C20.936155374
C30.00461716525
C40.594052018
C50.016885927
C61.04374583
C7103.736265

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 1.58e-06 1.22e-08 -8.04e-12 4.46e-07 5.22e-10 0.15
nd
1.60311
Vd
60.6
glass code
603606.344
glass status
standard
density
value: 3440
thermal expansion
value: 6e-06, temperature range: 243 343; value: 7.3e-06, temperature range: 293 573
dPgF
-0.0003
resistance
acid: 51.3; stain: 2.0; alkali: 2.0; climatic: 4.0; phosphate: 2.3

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 1.35e-06 K⁻¹ at 633 nm, dn/dT = 8.83e-07 K⁻¹ at 1310 nm, dn/dT = 8.43e-07 K⁻¹ at 1550 nm

References

Cite

SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com); See also SCHOTT glass data sheets; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 422 wavelengths, the same grid as the API and the library
N-SK14 (SCHOTT), N-SK14: n and k versus wavelength
λ (µm)nk
0.311.6441172.624100e-06
0.3116261.6434712.448189e-06
0.3132611.6428352.271355e-06
0.3149041.6422062.093594e-06
0.3165561.6415871.914900e-06
0.3182161.6409751.735268e-06
0.3198851.6403711.554695e-06
0.321.640331.542300e-06
0.3215631.6397761.447708e-06
0.323251.6391881.345651e-06
0.3249461.6386081.243059e-06
0.326651.6380361.139928e-06
0.3283641.6374711.036257e-06
0.3300861.6369149.320419e-07
0.3318181.6363638.272800e-07
0.3335581.635827.219687e-07
0.3341.6356846.952300e-07
0.3353081.6352846.598702e-07
0.3370671.6347556.123132e-07
0.3388351.6342325.645066e-07
0.3406121.6337175.164494e-07
0.3423991.6332084.681400e-07
0.3441951.6327054.195773e-07
0.3461.6322093.707598e-07
0.3478151.6317193.216862e-07
0.349641.6312352.723552e-07
0.351.631142.626100e-07
0.3514741.6307572.475753e-07
0.3533171.6302862.287652e-07
0.3551711.629822.098564e-07
0.3570341.629361.908484e-07
0.3589061.6289061.717408e-07
0.3607891.6284571.525329e-07
0.3626821.6280141.332243e-07
0.3645841.6275771.138143e-07
0.3651.6274821.095700e-07
0.3664961.6271441.023573e-07
0.3684191.6267189.309109e-08
0.371.6263728.547000e-08
0.3703511.6262968.455740e-08
0.3722941.625887.951210e-08
0.3742471.6254687.444033e-08
0.376211.6250626.934195e-08
0.3781831.6246616.421684e-08
0.381.6242975.949900e-08
0.3801671.6242645.913645e-08
0.3821611.6238725.481173e-08
0.3841661.6234855.046431e-08
0.3861811.6231034.609410e-08
0.3882071.6227254.170096e-08
0.391.6223963.781200e-08
0.3902431.6223523.767644e-08
0.392291.6219833.653503e-08
0.3943481.6216193.538763e-08
0.3964161.6212593.423421e-08
0.3984961.6209033.307474e-08
0.41.6206493.223600e-08
0.4005861.6205513.181893e-08
0.4026871.6202043.032367e-08
0.40481.6198612.882057e-08
0.4051.6198282.867800e-08
0.4069231.6195212.794020e-08
0.4090581.6191862.712127e-08
0.4112031.6188552.629803e-08
0.413361.6185272.547048e-08
0.4155281.6182032.463859e-08
0.4177081.6178832.380233e-08
0.4198991.6175672.296169e-08
0.421.6175532.292300e-08
0.4221021.6172552.266711e-08
0.4243161.6169462.239754e-08
0.4265421.616642.212656e-08
0.4287791.6163382.185416e-08
0.4310281.616042.158032e-08
0.4332891.6157452.130505e-08
0.4355621.6154532.102834e-08
0.4361.6153972.097500e-08
0.4378471.6151642.072124e-08
0.4401431.6148792.040563e-08
0.4424521.6145972.008837e-08
0.4447731.6143191.976945e-08
0.4471061.6140431.944885e-08
0.4494511.6137711.912657e-08
0.4518091.6135011.880259e-08
0.4541791.6132351.847692e-08
0.4565611.6129711.814954e-08
0.4589561.6127111.782045e-08
0.461.6125991.767700e-08
0.4613641.6124531.745553e-08
0.4637841.6121981.706245e-08
0.4662161.6119461.666730e-08
0.4686621.6116971.627009e-08
0.471121.6114511.587079e-08
0.4735921.6112071.546940e-08
0.4760761.6109661.506590e-08
0.4785731.6107271.466029e-08
0.4810831.6104911.425254e-08
0.4836071.6102581.384266e-08
0.4861441.6100271.343063e-08
0.4886941.6097991.301644e-08
0.4912571.6095731.260007e-08
0.4938341.609351.218153e-08
0.4964241.6091291.176078e-08
0.4990281.608911.133783e-08
0.51.6088291.118000e-08
0.5016461.6086941.109168e-08
0.5042771.608481.095049e-08
0.5069221.6082681.080855e-08
0.5095821.6080581.066587e-08
0.5122551.6078511.052244e-08
0.5149421.6076461.037826e-08
0.5176431.6074431.023332e-08
0.5203581.6072421.008762e-08
0.5230871.6070439.941157e-09
0.5258311.6068469.793926e-09
0.528591.6066529.645923e-09
0.5313621.6064599.497144e-09
0.5341491.6062689.347584e-09
0.5369511.6060799.197239e-09
0.5397681.6058929.046106e-09
0.5425991.6057078.894180e-09
0.5454451.6055248.741457e-09
0.5461.6054898.711700e-09
0.5483071.6053438.748496e-09
0.5511831.6051648.794379e-09
0.5540741.6049868.840502e-09
0.556981.604818.886868e-09
0.5599021.6046368.933476e-09
0.5628391.6044648.980329e-09
0.5657911.6042939.027428e-09
0.5687591.6041249.074774e-09
0.5717421.6039579.122368e-09
0.5747421.6037919.170212e-09
0.5777561.6036279.218307e-09
0.581.6035079.254100e-09
0.5807871.6034659.266657e-09
0.5838331.6033049.315272e-09
0.5868961.6031459.364141e-09
0.5899741.6029879.413267e-09
0.5930691.6028319.462651e-09
0.596181.6026769.512294e-09
0.5993071.6025239.562197e-09
0.6024511.6023719.612361e-09
0.6056111.602229.662789e-09
0.6087881.6020719.713482e-09
0.6119811.6019249.764440e-09
0.6151911.6017779.815666e-09
0.6184181.6016329.867160e-09
0.621.6015629.892400e-09
0.6216621.6014899.918937e-09
0.6249231.6013469.970998e-09
0.6282011.6012051.002333e-08
0.6314961.6010661.007594e-08
0.6348091.6009271.012882e-08
0.6381391.600791.018198e-08
0.6414861.6006541.023542e-08
0.6448511.6005191.028915e-08
0.6482341.6003861.034315e-08
0.6516341.6002531.039743e-08
0.6550521.6001221.045200e-08
0.6584881.5999921.050686e-08
0.661.5999351.053100e-08
0.6619421.5998631.056198e-08
0.6654141.5997351.061736e-08
0.6689051.5996081.067303e-08
0.6724131.5994821.072899e-08
0.6759411.5993571.078525e-08
0.6794861.5992341.084180e-08
0.683051.5991111.089865e-08
0.6866331.598991.095580e-08
0.6902351.5988691.101325e-08
0.6938561.5987491.107100e-08
0.6974951.5986311.112905e-08
0.71.598551.116900e-08
0.7011541.5985131.119828e-08
0.7048321.5983961.129162e-08
0.7085291.598281.138545e-08
0.7122461.5981651.147976e-08
0.7159821.5980511.157458e-08
0.7197371.5979381.166989e-08
0.7235131.5978251.176570e-08
0.7273081.5977141.186201e-08
0.7311231.5976031.195883e-08
0.7349581.5974931.205616e-08
0.7388131.5973841.215399e-08
0.7426891.5972761.225234e-08
0.7465841.5971691.235121e-08
0.7505011.5970621.245059e-08
0.7544371.5969561.255050e-08
0.7583951.5968511.265093e-08
0.7623731.5967461.275188e-08
0.7663721.5966421.285337e-08
0.7703921.5965391.295539e-08
0.7744331.5964371.305794e-08
0.7784951.5963351.316103e-08
0.7825791.5962341.326466e-08
0.7866841.5961341.336884e-08
0.790811.5960341.347356e-08
0.7949581.5959351.357883e-08
0.7991281.5958371.368466e-08
0.803321.5957391.379104e-08
0.8075341.5956411.389797e-08
0.811771.5955451.400547e-08
0.8160281.5954491.411353e-08
0.8203081.5953531.422216e-08
0.8246111.5952581.433136e-08
0.8289371.5951641.444113e-08
0.8332851.595071.455148e-08
0.8376561.5949761.466240e-08
0.842051.5948831.477391e-08
0.8464671.5947911.488600e-08
0.8509071.5946991.499868e-08
0.855371.5946071.511195e-08
0.8598571.5945161.522582e-08
0.8643671.5944261.534028e-08
0.8689011.5943361.545534e-08
0.8734591.5942461.557101e-08
0.8780411.5941571.568728e-08
0.8826471.5940681.580417e-08
0.8872771.5939791.592166e-08
0.8919311.5938911.603978e-08
0.8966091.5938031.615851e-08
0.9013131.5937161.627787e-08
0.906041.5936291.639785e-08
0.9107931.5935421.651846e-08
0.9155711.5934561.663970e-08
0.9203731.593371.676158e-08
0.9252011.5932841.688410e-08
0.9300541.5931991.700726e-08
0.9349331.5931141.713107e-08
0.9398371.5930291.725552e-08
0.9447671.5929441.738063e-08
0.9497221.592861.750640e-08
0.9547041.5927761.763283e-08
0.9597121.5926921.775991e-08
0.9647461.5926091.788767e-08
0.9698071.5925251.801609e-08
0.9748941.5924421.814519e-08
0.9800081.5923591.827497e-08
0.9851481.5922761.840543e-08
0.9903161.5921941.853657e-08
0.995511.5921111.866840e-08
1.000731.5920291.880092e-08
1.005981.5919471.893413e-08
1.011261.5918651.906805e-08
1.016561.5917841.920267e-08
1.02191.5917021.933799e-08
1.027261.591621.947402e-08
1.032641.5915391.961077e-08
1.038061.5914581.974823e-08
1.043511.5913761.988642e-08
1.048981.5912952.002533e-08
1.054481.5912142.016497e-08
1.061.5911332.030500e-08
1.060011.5911332.030722e-08
1.065571.5910522.123099e-08
1.071161.5909712.215961e-08
1.076781.590892.309310e-08
1.082431.5908092.403149e-08
1.088111.5907292.497480e-08
1.093821.5906482.592305e-08
1.099551.5905672.687629e-08
1.105321.5904862.783452e-08
1.111121.5904052.879778e-08
1.116951.5903242.976609e-08
1.122811.5902433.073948e-08
1.12871.5901623.171797e-08
1.134621.5900813.270160e-08
1.140571.593.369039e-08
1.146551.5899183.468437e-08
1.152561.5898373.568356e-08
1.158611.5897563.668799e-08
1.164691.5896743.769768e-08
1.17081.5895923.871268e-08
1.176941.5895113.973300e-08
1.183111.5894294.075867e-08
1.189321.5893464.178972e-08
1.195561.5892644.282618e-08
1.201831.5891824.386808e-08
1.208131.5890994.491544e-08
1.214471.5890164.596830e-08
1.220841.5889334.702668e-08
1.227241.588854.809061e-08
1.233681.5887674.916012e-08
1.240151.5886835.023524e-08
1.246661.5885995.131600e-08
1.25321.5885155.240243e-08
1.259771.5884315.349456e-08
1.266381.5883465.459241e-08
1.273021.5882615.569603e-08
1.27971.5881765.680544e-08
1.286411.588095.792066e-08
1.293161.5880045.904173e-08
1.299941.5879186.016869e-08
1.306761.5878326.130156e-08
1.313621.5877456.244036e-08
1.320511.5876586.358515e-08
1.327431.587576.473593e-08
1.33441.5874826.589276e-08
1.34141.5873946.705565e-08
1.348431.5873056.822464e-08
1.355511.5872166.939977e-08
1.362621.5871277.058105e-08
1.369761.5870377.176854e-08
1.376951.5869477.296225e-08
1.384171.5868567.416223e-08
1.391431.5867647.536849e-08
1.398731.5866737.658109e-08
1.406071.5865817.780005e-08
1.413441.5864887.902540e-08
1.420861.5863958.025718e-08
1.428311.5863018.149542e-08
1.43581.5862078.274015e-08
1.443331.5861128.399142e-08
1.45091.5860178.524925e-08
1.458521.5859218.651367e-08
1.466171.5858258.778473e-08
1.473861.5857288.906245e-08
1.481591.585639.034688e-08
1.489361.5855329.163805e-08
1.497171.5854339.293599e-08
1.505031.5853339.424073e-08
1.512921.5852339.555232e-08
1.520861.5851339.687079e-08
1.528831.5850319.819618e-08
1.531.5850169.839000e-08
1.536851.5849291.071474e-07
1.544911.5848261.174495e-07
1.553021.5847231.278056e-07
1.561161.5846191.382161e-07
1.569351.5845141.486811e-07
1.577591.5844081.592011e-07
1.585861.5843021.697762e-07
1.594181.5841941.804068e-07
1.602541.5840861.910931e-07
1.610951.5839782.018355e-07
1.61941.5838682.126343e-07
1.627891.5837582.234897e-07
1.636431.5836462.344020e-07
1.645021.5835342.453716e-07
1.653641.5834212.563987e-07
1.662321.5833082.674837e-07
1.671041.5831932.786268e-07
1.67981.5830772.898284e-07
1.688611.5829613.010887e-07
1.697471.5828433.124081e-07
1.706381.5827253.237868e-07
1.715331.5826053.352253e-07
1.724321.5824853.467237e-07
1.733371.5823633.582825e-07
1.742461.5822413.699019e-07
1.75161.5821173.815823e-07
1.760791.5819933.933239e-07
1.770031.5818674.051271e-07
1.779311.5817414.169922e-07
1.788641.5816134.289195e-07
1.798031.5814844.409095e-07
1.807461.5813544.529623e-07
1.816941.5812234.650783e-07
1.826471.581094.772579e-07
1.836051.5809574.895014e-07
1.845681.5808225.018091e-07
1.855361.5806865.141813e-07
1.865091.5805495.266185e-07
1.874881.5804115.391209e-07
1.884711.5802715.516889e-07
1.89461.580135.643228e-07
1.904541.5799885.770230e-07
1.914531.5798445.897898e-07
1.924571.5796996.026235e-07
1.934671.5795536.155246e-07
1.944811.5794056.284933e-07
1.955011.5792566.415301e-07
1.965271.5791056.546353e-07
1.971.5790356.606800e-07
1.975581.5789537.040323e-07
1.985941.57887.845624e-07
1.996361.5786458.655149e-07
2.006831.5784889.468921e-07
2.017361.578331.028696e-06
2.027941.5781711.110929e-06
2.038581.5780091.193594e-06
2.049271.5778471.276692e-06
2.060021.5776821.360226e-06
2.070831.5775161.444198e-06
2.081691.5773481.528611e-06
2.092611.5771791.613466e-06
2.103581.5770081.698766e-06
2.114621.5768351.784514e-06
2.125711.576661.870712e-06
2.136861.5764841.957362e-06
2.148071.5763062.044466e-06
2.159341.5761262.132028e-06
2.170661.5759442.220048e-06
2.182051.575762.308531e-06
2.19351.5755742.397477e-06
2.2051.5753862.486890e-06
2.216571.5751972.576772e-06
2.22821.5750052.667126e-06
2.239881.5748112.757953e-06
2.251631.5746162.849257e-06
2.263441.5744182.941040e-06
2.275321.5742183.033304e-06
2.287251.5740163.126053e-06
2.299251.5738113.219287e-06
2.311311.5736053.313011e-06
2.323431.5733963.407227e-06
2.3251.5733693.419400e-06
2.335621.5731853.679183e-06
2.347871.5729723.978846e-06
2.360191.5727564.280082e-06
2.372571.5725384.582897e-06
2.385011.5723184.887300e-06
2.397521.5720955.193301e-06
2.41011.571875.500906e-06
2.422741.5716425.810125e-06
2.435451.5714126.120966e-06
2.448231.5711796.433437e-06
2.461071.5709436.747548e-06
2.473981.5707057.063306e-06
2.486951.5704647.380721e-06
2.51.5702217.699800e-06

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
—