Database of Optical Constants (N & K; Index of Refraction & Extinction Coefficients)

Please select an element from the following periodic table to start your search of Database of Optical Constants.

Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Period
1 1
H		 2
He
2 3
Li		 4
Be		 5
B		 6
C		 7
N		 8
O		 9
F		 10
Ne
3 11
Na		 12
Mg		 13
Al		 14
Si		 15
P		 16
S		 17
Cl		 18
Ar
4 19
K		 20
Ca		 21
Sc		 22
Ti		 23
V		 24
Cr		 25
Mn		 26
Fe		 27
Co		 28
Ni		 29
Cu		 30
Zn		 31
Ga		 32
Ge		 33
As		 34
Se		 35
Br		 36
Kr
5 37
Rb		 38
Sr		 39
Y		 40
Zr		 41
Nb		 42
Mo		 43
Tc		 44
Ru		 45
Rh		 46
Pd		 47
Ag		 48
Cd		 49
In		 50
Sn		 51
Sb		 52
Te		 53
I		 54
Xe
6 55
Cs		 56
Ba		 *
La		 72
Hf		 73
Ta		 74
W		 75
Re		 76
Os		 77
Ir		 78
Pt		 79
Au		 80
Hg		 81
Tl		 82
Pb		 83
Bi		 84
Po		 85
At		 86
Rn
7 87
Fr		 88
Ra		 **
Ac		 104
Rf		 105
Db		 106
Sg		 107
Bh		 108
Hs		 109
Mt		 110
Ds		 111
Rg		 112
Uub		 113
Uut		 114
Uuq		 115
Uup		 116
Uuh		 117
Uus		 118
Uuo
 
*Lanthanoids 57
La		 58
Ce		 59
Pr		 60
Nd		 61
Pm		 62
Sm		 63
Eu		 64
Gd		 65
Tb		 66
Dy		 67
Ho		 68
Er		 69
Tm		 70
Yb		 71
Lu
**Actinoids 89
Ac		 90
Th		 91
Pa		 92
U		 93
Np		 94
Pu		 95
Am		 96
Cm		 97
Bk		 98
Cf		 99
Es		 100
Fm		 101
Md		 102
No		 103
Lr

 

You can also choose a category in which you are interested from the following table for your search of Database of Optical Constants.

 
 

Optical constants or dielectric constants are not constant. They are  functions of wavelength and physical states such as physical density, crystallinity, grain size and orientation, etc. The most obvious case is when you compare thin film with bulk materials. Therefore, it is critical to have your own materials measured under every condition to learn the true optical constants for the particular materials. The Database of Optical Constants (we also call it NK Database) established by us is only for your reference. It is a good idea to learn the general dispersion behaviors for materials, which in turn will help you develop optical models to study optical properties of the materials processed under your specific processing conditions. But if you directly apply these data to your design, you do it at your own risk. We recommend that you always measure optical properties by yourself. When you need help, we are here to provide you various advanced spectroscopic ellispometers, reflectometers, microspectrophtometer tools and also professional Analytical Service for such purpose.

TFProbe NK Tables (or called NK database) program has been released. You are welcome to download setup package. It is free! However you'll need a serial number (SN) to complete setup. Please contact us to get SN before you run installation. Below is the link to download installation package:

TFProbe NK Tables Installation Package

In the near future, we'll update the measurement technique, dispersion expressions and principles here for a knowledge base. We hope this website become a starting point for most of the new comers in the ellipsometry field. If you have any comments or suggestions on our Database of Optical Constants, please feel free to let us know.