SNOM Test Grating

Test grating for scanning near-field optical microscopy.


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Grating Specifications
Substrate Quartz (0.5 mm thickness)
Substrate Size 10 x 10 mm
Rhomb Material Vanadium
Thickness of Vanadium Layer 20-30 nm
Active Area Central diameter 2-5 mm array
Transmission Coefficient through metal coating (rhomb) ≤ 20%
Reflection Coefficient from metal coating (rhomb) ≥ 40%
R Curvature of Rhomb ≤ 50 nm