| Autor: |
Bauser HC, Foley MD, Phelan ME, Weigand W, Needell DR, Holman ZC, Atwater HA |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2022 Jul 18; Vol. 30 (15), pp. 26787-26793. |
| DOI: |
10.1364/OE.456898 |
| Abstrakt: |
We report spectrally selective visible wavelength reflectors using hydrogenated amorphous silicon carbide (a-SiC:H) as a high index contrast material. Beyond 610nm and through the near infrared spectrum, a-SiC:H exhibits very low loss and exhibits an wavelength averaged index of refraction of n = 3.1. Here we design, fabricate, and characterize such visible reflectors using a hexagonal array of a-SiC:H nanopillars as wavelength-selective mirrors with a stop-band of approximately 40 nm full-width at half maximum. The fabricated high contrast grating exhibits reflectivity R >94% at a resonance wavelength of 642nm with a single layer of a-SiC:H nanopillars. The resonance wavelength is tunable by adjusting the geometrical parameters of the a-SiC:H nanopillar array, and we observe a stop-band spectral center shift from 635 nm up to 642 nm. High contrast gratings formed from a-SiC:H nanopillars are a promising platform for various visible wavelength nanophotonics applications. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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