Ref index/wavelength data for GaSb & InSb at 2-20um

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In summary, the conversation is about the need to obtain refractive index vs wavelength data for GaSb and InSb materials in the range of 2μm to 10μm. The speaker mentions two websites that only have data up to 1-2μm, and asks for suggestions on where to find data for larger wavelengths. A link to an article with calculated optical properties for GaX (XP_As_Sb) under hydrostatic pressure is provided as a potential resource.
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I need to obtain refractive index vs wavelength data for the following materials:

GaSb (Gallium Antimonide)
InSb (Indium Antimonide)

For the range from 2μm up to ideally 20μm but up to 10μm would do.

Looking on the two websites I know of for sourcing such data:

http://refractiveindex.info/?shelf=main&book=GaSb&page=Aspnes
http://www.ioffe.ru/SVA/NSM/nk/A3B5/Gif/gasb.gif

But these websites only have values up to 1-2μm.

Where can I find data for larger wavelengths?
 
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Have a look at this article http://www.researchgate.net/profile/Ali_Reshak/publication/226769627_Calculated_optical_properties_of_GaX_%28XP_As_Sb%29_under_hydrostatic_pressure/links/0912f50d0b1a322c54000000.pdf
 
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Related to Ref index/wavelength data for GaSb & InSb at 2-20um

What is the refractive index of GaSb and InSb at different wavelengths?

The refractive index of GaSb and InSb varies depending on the wavelength of light passing through it. At a wavelength of 2 μm, the refractive index of GaSb is around 3.5, while the refractive index of InSb is approximately 3.2.

How does the refractive index of GaSb and InSb change with increasing wavelength?

As the wavelength of light increases, the refractive index of both GaSb and InSb decreases. For example, at a wavelength of 20 μm, the refractive index of GaSb drops to around 3.2, while the refractive index of InSb decreases to approximately 3.0.

What is the relationship between refractive index and wavelength in GaSb and InSb?

The refractive index of GaSb and InSb is inversely proportional to the wavelength of light passing through it. This means that as the wavelength increases, the refractive index decreases, and vice versa.

Why is knowing the refractive index of GaSb and InSb important?

The refractive index of GaSb and InSb is important in various applications, such as in the design and fabrication of optical devices, including lenses, prisms, and waveguides. It also plays a crucial role in determining the optical properties and behavior of these materials.

How is the refractive index of GaSb and InSb measured at different wavelengths?

The refractive index of GaSb and InSb can be measured using techniques such as ellipsometry, interferometry, and spectroscopic methods. These methods involve measuring the change in the polarization or phase of light as it passes through the material at different wavelengths.

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