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Figure 1

From: Non-iridescent Transmissive Structural Color Filter Featuring Highly Efficient Transmission and High Excitation Purity

Figure 1

Transmissive Structural Color Filter Featuring Angle Independent Spectral Responses and High Non-iridescence.

(a) Configuration of the transmissive structural color filter featuring angle-independent spectral response and high non-iridescence. (b) Scanning electron microscope (SEM) image of the fabricated filter employing three etalons based on a-Si cavity stacked one upon another interleaved with SiO2 layers. (c) Measured (i) and simulated (ii) spectral responses for unpolarized light at various angles of incidence θi and (d) Simulated and measured variation of peak transmission and center wavelength shift with θi for unpolarized light.

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