Substrate-Independent Light Confinement in Bioinspired All-Dielectric Surface Resonators
Author(s)Regan, Emma C.; Shen, Yichen; Lopez, Josue J.; Hsu, Chia Wei; Zhen, Bo; Joannopoulos, John D.; Soljačić, Marin; Regan, Emma; Lopez, Josue Jacob; Joannopoulos, John; Soljacic, Marin; ... Show more Show less
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Traditionally, photonic crystal slabs can support resonances that are strongly confined to the slab but also couple to external radiation. However, when a photonic crystal slab is placed on a substrate, the resonance modes become less confined, and as the index contrast between slab and substrate decreases, they eventually disappear. Using the scale structure of the Dione juno butterfly wing as an inspiration, we present a low-index zigzag surface structure that supports resonance modes even without index contrast with the substrate. The zigzag structure supports resonances that are contained away from the substrate, which reduces the interaction between the resonance and the substrate. We experimentally verify the existence of substrate-independent resonances in the visible wavelength regime. Potential applications include substrate-independent structural color and light guiding.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Research Laboratory of Electronics
American Chemical Society (ACS)
Regan, Emma C.; Shen, Yichen; Lopez, Josue J.; Hsu, Chia Wei; Zhen, Bo; Joannopoulos, John D. and Soljačić, Marin. "Substrate-Independent Light Confinement in Bioinspired All-Dielectric Surface Resonators." American Chemical Society (ACS) 3, no. 4 (March 2016): 532-536.© 2016 American Chemical Society (ACS)
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