Refractive index of K (Potassium)

Optical constants of K (Potassium)
Althoff and Hertz 1967: n,k 2.5–10.15 µm

Wavelength: µm

(2.5–10.15)

Complex refractive index (n+ik)[ i ]

Derived optical constants

References

R. Althoff and J. H. Hertz. Measurement of the optical constants of Na and K in the range of wavelength from 2.5 to 10 μ, Infrared Phys. 7, 11-16 (1967)

Data

[CSV - comma separated] [TXT - tab separated] [Full database record]

Optical transmission calculator

Wavelength: µm
Thickness:
Calculation method:

Transmittance[ i ]

T =

LogX LogY eV

Reflection calculator

Wavelength: µm
Angle of incidence (0~90°):
Direction: in out

Reflectance[ i ]

P-polarized

R_P =

S-polarized

R_S =

Non-polarized (Rp+Rs)/2

R =

R_P R_S R LogY

Reflection phase[ i ]

ɸ_P = °
ɸ_S = °

Brewster's angle[ i ]

θ_B = °

Critical angle[ i ] [ i ]

θ_C = °

INFO

Potassium, K

Potassium (K) is an alkali metal that is highly reactive, especially with water. While potassium itself is not used in optical applications due to its reactivity and lack of transparency, its compounds, like potassium bromide (KBr) and potassium chloride (KCl), are highly useful. These compounds are often used in the form of transparent crystals for the transmission of infrared light in a range of spectroscopic techniques, including infrared spectroscopy. Potassium compounds can also serve as host materials for various dopants in solid-state lasers and optical amplifiers. Potassium's reactivity and solubility often necessitate special handling and storage conditions to maintain optical quality.

RefractiveIndex.INFO

Optical constants of K (Potassium)
Althoff and Hertz 1967: n,k 2.5–10.15 µm

Complex refractive index (n+ik)[ i ]

Refractive index[ i ]

Extinction coefficient[ i ]

Derived optical constants

Relative permittivity (dielectric constants)[ i ] [ i ]

Absorption coefficient[ i ] [ i ]

Abbe number[ i ]

Chromatic dispersion[ i ]

Group index[ i ] [ i ]

Group velocity dispersion[ i ] [ i ] [ i ]

References

Data

Optical transmission calculator

Transmittance[ i ]

Reflection calculator

Reflectance[ i ]

P-polarized

S-polarized

Non-polarized (Rp+Rs)/2

Reflection phase[ i ]

Brewster's angle[ i ]

Critical angle[ i ] [ i ]

INFO

Potassium, K

External links

Optical constants of K (Potassium)Althoff and Hertz 1967: n,k 2.5–10.15 µm

Complex refractive index (n+ik)[ i ]

Refractive index[ i ]

Extinction coefficient[ i ]

Derived optical constants

Relative permittivity (dielectric constants)[ i ] [ i ]

Absorption coefficient[ i ] [ i ]

Abbe number[ i ]

Chromatic dispersion[ i ]

Group index[ i ] [ i ]

Group velocity dispersion[ i ] [ i ] [ i ]

References

Data

Optical transmission calculator

Transmittance[ i ]

Reflection calculator

Reflectance[ i ]

P-polarized

S-polarized

Non-polarized (Rp+Rs)/2

Reflection phase[ i ]

Brewster's angle[ i ]

Critical angle[ i ] [ i ]

INFO

Potassium, K

External links

Optical constants of K (Potassium)
Althoff and Hertz 1967: n,k 2.5–10.15 µm