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.