Optical constants

Refractive index of Kr (Krypton)

Bideau-Mehu et al. 1981: n 0.140–0.623 µm

Data
formula 6
Range
0.1404–0.6234 µm
Temperature
273.15 K
State
gas
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.1404–0.6234 µm
Refractive index n
1.00043
Extinction coefficient k
0
Permittivity ε1
1.00086
Permittivity ε2
0
Absorption coefficient α
0 cm⁻¹
Penetration depth δ = λ/(2πk)
— nm
Abbe number Vd
—
Chromatic dispersion dn/dλ
-3.10416e-05 µm⁻¹
Group index ng
1.00045
Group velocity dispersion
0.058966 fs²/mm
Dispersion parameter D
-0.321691 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

# Kr (Krypton): Bideau-Mehu et al. 1981: n 0.140–0.623 µm
kr = ls.fetch_refractiveindex("main", "Kr", "Bideau-Mehu", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(kr.range_nm)  # (140.4, 623.4) nm
eps = kr.eps([296])  # 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

Gases (formula 6), λ in µm
n−1=0.0025363765.4742−λ−2+0.0027364973.698−λ−2+0.0620802181.08−λ−2

Valid from 0.1404 to 0.6234 µm.

Coefficients as stored
CiValue
C10.0
C20.00253637
C365.4742
C40.00273649
C573.698
C60.0620802
C7181.08

Comments and conditions

Standard conditions: 0 °C, 760 torr (101.325 kPa).

Conditions

temperature
273.15 K
pressure
101325

References

1) A. Bideau-Mehu, Y. Guern, R. Abjean, A. Johannin-Gilles. Measurement of refractive indices of neon, argon, krypton and xenon in the 253.7-140.4 nm wavelength range. Dispersion relations and estimated oscillator strengths of the resonance lines. J. Quant. Spectrosc. Rad. Transfer 25, 395-402 (1981)
2) J. Koch. Kungl. Fysiografiska Sällskapets i Lund Förhandlingar (Proceedings of the Royal Physiographic Society at Lund) 19, 173 (1949)
* Sellmeier formula is derived by the authors of ref. 1 using their own data in the 0.1404-0.2537 μm range combined with data from ref. 2 at longer wavelengths.
  • doi:10.1016/0022-4073(81)90057-1 Measurement of refractive indices of neon, argon, krypton and xenon in the 253.7–140.4 nm wavelength range. Dispersion relations and estimated oscillator strengths of the resonance lines, Journal of Quantitative Spectroscopy and Radiative Transfer (1981)

Cite

A. Bideau-Mehu, Y. Guern, R. Abjean and A. Johannin-Gilles. Measurement of refractive indices of neon, argon, krypton and xenon in the 253.7–140.4 nm wavelength range. Dispersion relations and estimated oscillator strengths of the resonance lines. Journal of Quantitative Spectroscopy and Radiative Transfer, 25, 395-402 (1981), doi:10.1016/0022-4073(81)90057-1; J. Koch. Kungl. Fysiografiska Sällskapets i Lund Förhandlingar (Proceedings of the Royal Physiographic Society at Lund) 19, 173 (1949); Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 400 wavelengths, the same grid as the API and the library
Kr (Krypton), Bideau-Mehu et al. 1981: n 0.140–0.623 µm: n and k versus wavelength
λ (µm)n
0.14041.000767
0.1409261.00076
0.1414531.000753
0.1419821.000746
0.1425141.000739
0.1430471.000733
0.1435831.000726
0.144121.00072
0.144661.000715
0.1452011.000709
0.1457451.000704
0.146291.000699
0.1468381.000694
0.1473871.000689
0.1479391.000684
0.1484931.00068
0.1490491.000676
0.1496071.000671
0.1501671.000667
0.1507291.000663
0.1512931.000659
0.1518591.000656
0.1524281.000652
0.1529981.000648
0.1535711.000645
0.1541461.000642
0.1547231.000638
0.1553021.000635
0.1558831.000632
0.1564661.000629
0.1570521.000626
0.157641.000623
0.158231.00062
0.1588221.000617
0.1594171.000615
0.1600131.000612
0.1606121.00061
0.1612141.000607
0.1618171.000604
0.1624231.000602
0.1630311.0006
0.1636411.000597
0.1642531.000595
0.1648681.000593
0.1654851.000591
0.1661051.000588
0.1667271.000586
0.1673511.000584
0.1679771.000582
0.1686061.00058
0.1692371.000578
0.169871.000576
0.1705061.000574
0.1711441.000573
0.1717851.000571
0.1724281.000569
0.1730731.000567
0.1737211.000566
0.1743711.000564
0.1750241.000562
0.1756791.00056
0.1763371.000559
0.1769971.000557
0.1776591.000556
0.1783241.000554
0.1789921.000553
0.1796621.000551
0.1803341.00055
0.1810091.000548
0.1816871.000547
0.1823671.000545
0.183051.000544
0.1837351.000543
0.1844221.000541
0.1851131.00054
0.1858061.000539
0.1865011.000537
0.1871991.000536
0.18791.000535
0.1886031.000534
0.1893091.000533
0.1900181.000531
0.1907291.00053
0.1914431.000529
0.1921591.000528
0.1928791.000527
0.1936011.000526
0.1943251.000525
0.1950531.000523
0.1957831.000522
0.1965161.000521
0.1972511.00052
0.197991.000519
0.1987311.000518
0.1994741.000517
0.2002211.000516
0.2009711.000515
0.2017231.000514
0.2024781.000513
0.2032361.000513
0.2039961.000512
0.204761.000511
0.2055261.00051
0.2062961.000509
0.2070681.000508
0.2078431.000507
0.2086211.000506
0.2094021.000505
0.2101861.000505
0.2109721.000504
0.2117621.000503
0.2125551.000502
0.213351.000501
0.2141491.000501
0.214951.0005
0.2157551.000499
0.2165631.000498
0.2173731.000498
0.2181871.000497
0.2190041.000496
0.2198231.000495
0.2206461.000495
0.2214721.000494
0.2223011.000493
0.2231331.000493
0.2239681.000492
0.2248071.000491
0.2256481.00049
0.2264931.00049
0.227341.000489
0.2281911.000489
0.2290461.000488
0.2299031.000487
0.2307631.000487
0.2316271.000486
0.2324941.000485
0.2333641.000485
0.2342381.000484
0.2351151.000484
0.2359951.000483
0.2368781.000482
0.2377651.000482
0.2386551.000481
0.2395481.000481
0.2404451.00048
0.2413451.00048
0.2422481.000479
0.2431551.000479
0.2440651.000478
0.2449781.000478
0.2458951.000477
0.2468161.000476
0.247741.000476
0.2486671.000475
0.2495981.000475
0.2505321.000474
0.251471.000474
0.2524111.000474
0.2533561.000473
0.2543041.000473
0.2552561.000472
0.2562111.000472
0.257171.000471
0.2581331.000471
0.2590991.00047
0.2600691.00047
0.2610431.000469
0.262021.000469
0.2631.000468
0.2639851.000468
0.2649731.000468
0.2659651.000467
0.266961.000467
0.267961.000466
0.2689631.000466
0.2699691.000466
0.270981.000465
0.2719941.000465
0.2730121.000464
0.2740341.000464
0.275061.000464
0.2760891.000463
0.2771231.000463
0.278161.000462
0.2792011.000462
0.2802461.000462
0.2812951.000461
0.2823481.000461
0.2834051.000461
0.2844661.00046
0.2855311.00046
0.2865991.00046
0.2876721.000459
0.2887491.000459
0.289831.000459
0.2909151.000458
0.2920031.000458
0.2930961.000458
0.2941941.000457
0.2952951.000457
0.29641.000457
0.2975091.000456
0.2986231.000456
0.2997411.000456
0.3008631.000455
0.3019891.000455
0.3031191.000455
0.3042541.000454
0.3053931.000454
0.3065361.000454
0.3076831.000454
0.3088351.000453
0.3099911.000453
0.3111511.000453
0.3123161.000452
0.3134851.000452
0.3146581.000452
0.3158361.000452
0.3170181.000451
0.3182051.000451
0.3193961.000451
0.3205911.000451
0.3217911.00045
0.3229961.00045
0.3242051.00045
0.3254181.00045
0.3266361.000449
0.3278591.000449
0.3290861.000449
0.3303181.000449
0.3315541.000448
0.3327961.000448
0.3340411.000448
0.3352921.000448
0.3365471.000447
0.3378061.000447
0.3390711.000447
0.340341.000447
0.3416141.000446
0.3428921.000446
0.3441761.000446
0.3454641.000446
0.3467571.000446
0.3480551.000445
0.3493581.000445
0.3506661.000445
0.3519781.000445
0.3532961.000445
0.3546181.000444
0.3559451.000444
0.3572781.000444
0.3586151.000444
0.3599571.000443
0.3613051.000443
0.3626571.000443
0.3640151.000443
0.3653771.000443
0.3667451.000443
0.3681171.000442
0.3694951.000442
0.3708781.000442
0.3722671.000442
0.373661.000442
0.3750591.000441
0.3764631.000441
0.3778721.000441
0.3792861.000441
0.3807061.000441
0.3821311.000441
0.3835611.00044
0.3849971.00044
0.3864381.00044
0.3878841.00044
0.3893361.00044
0.3907941.000439
0.3922561.000439
0.3937251.000439
0.3951981.000439
0.3966781.000439
0.3981621.000439
0.3996531.000439
0.4011491.000438
0.402651.000438
0.4041571.000438
0.405671.000438
0.4071881.000438
0.4087131.000438
0.4102421.000437
0.4117781.000437
0.4133191.000437
0.4148661.000437
0.4164191.000437
0.4179781.000437
0.4195421.000437
0.4211131.000436
0.4226891.000436
0.4242711.000436
0.4258591.000436
0.4274531.000436
0.4290531.000436
0.4306591.000436
0.4322711.000435
0.4338891.000435
0.4355131.000435
0.4371431.000435
0.438781.000435
0.4404221.000435
0.4420711.000435
0.4437251.000435
0.4453861.000434
0.4470531.000434
0.4487271.000434
0.4504061.000434
0.4520921.000434
0.4537841.000434
0.4554831.000434
0.4571881.000434
0.4588991.000434
0.4606171.000433
0.4623411.000433
0.4640721.000433
0.4658091.000433
0.4675521.000433
0.4693021.000433
0.4710591.000433
0.4728221.000433
0.4745921.000433
0.4763681.000432
0.4781511.000432
0.4799411.000432
0.4817381.000432
0.4835411.000432
0.4853511.000432
0.4871671.000432
0.4889911.000432
0.4908211.000432
0.4926581.000431
0.4945021.000431
0.4963531.000431
0.4982111.000431
0.5000761.000431
0.5019481.000431
0.5038271.000431
0.5057121.000431
0.5076051.000431
0.5095051.000431
0.5114131.000431
0.5133271.00043
0.5152481.00043
0.5171771.00043
0.5191131.00043
0.5210561.00043
0.5230061.00043
0.5249641.00043
0.5269291.00043
0.5289011.00043
0.5308811.00043
0.5328681.00043
0.5348621.000429
0.5368641.000429
0.5388741.000429
0.5408911.000429
0.5429151.000429
0.5449481.000429
0.5469871.000429
0.5490351.000429
0.551091.000429
0.5531531.000429
0.5552231.000429
0.5573011.000429
0.5593871.000429
0.5614811.000428
0.5635831.000428
0.5656921.000428
0.567811.000428
0.5699351.000428
0.5720681.000428
0.574211.000428
0.5763591.000428
0.5785161.000428
0.5806821.000428
0.5828551.000428
0.5850371.000428
0.5872271.000428
0.5894251.000428
0.5916311.000427
0.5938461.000427
0.5960681.000427
0.59831.000427
0.6005391.000427
0.6027871.000427
0.6050431.000427
0.6073081.000427
0.6095811.000427
0.6118631.000427
0.6141531.000427
0.6164521.000427
0.6187591.000427
0.6210751.000427
0.62341.000427

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
—