Broadband Gold Mirrors

If very small broadband mirrors with dimensions of only a few millimeters are needed then gold coated GaAs chips are appropriate. A single crystalline GaAs wafer as substrate for a reflecting gold layer has a very smooth surface and a good thermal conductivity of 55 W/(m*K). It can be cutted into small quadratic or rectangular chips.
Gold mirrors can be used as broadband reflectors for wavelengths > 800 nm. The reflectance increases continuously with increasing wavelength.

We provide unmounted gold mirrors with a standard substrate thickness of 450 µm

Available chip areas:

• 4.0 mm x 4.0 mm
• 2.0 mm x 2.0 mm
• 1.3 mm x 1.3 mm
• custom dimensions on request

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