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Optical constants of Tl3AsSe3 (Thallium arsenic selenide, TAS)
Ewbank et al. 1980: n(e) 2–12 µm

Wavelength: µm
 (2–12)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{8.993λ^2}{λ^2-0.444^2}+\frac{0.308λ^2}{λ^2-25.0^2}$$

Comments

Extraordinary ray (e)

References

M. D. Ewbank, P. R. Newman, N. L. Mota, S. M. Lee, W. L. Wolfe, A. G. DeBell, W. A. Harrison. The temperature dependence of optical and mechanical properties of Tl3AsSe3. J. Appl. Phys. 51, 3848-3852 (1980)

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

INFO

Thallium arsenic selenide, Tl3AsSe3 (TAS)

Thallium arsenic selenide (Tl3AsSe3, often referred to as TAS) is a mixed crystal compound known for its nonlinear optical properties and high electro-optic coefficients. Its large transparency range, spanning the mid-infrared spectrum, makes it a valuable material for infrared detectors, parametric oscillators, and other optoelectronic devices. TAS is especially useful in applications that require fast response times due to its high-speed electro-optic effect. However, handling and processing TAS should be approached with caution, as both thallium and arsenic are highly toxic.