2 research outputs found
Supplementary document for Neural networks for calculation of complex fields from far-field intensities in mesoscopic photonic systems - 6337548.pdf
Elaboration on transfer matrix methods, FDTD simulations, layer information for 1D and 2D networks, and error information for 2D networks
Self-Assembled Photonic Crystals of Monodisperse Dendritic Fibrous Nanosilica for Lasing: Role of Fiber Density
Photonic crystals
are essentially a periodic (“crystalline”) arrangement
of dielectric nanoparticles that respond in unison to incident light.
They can be used to harvest light in various applications such as
photocatalysis, solar cells, and lasing. In this work, we prepared
the photonic crystals of dendritic fibrous nanosilica (DFNS) by their
self-assembly. Because of the narrow particle size distribution of
the as-synthesized DFNS, they readily formed colored photonic crystals.
The photonic band gap was found to be tunable by using DFNS of various
sizes and fiber densities. Notably, even after having similar particle
sizes (but with different fiber densities), they showed different
photonic band gaps, indicating that the fiber density plays a role
in the band gap of photonic crystals. Such observations have not been
reported before. This could have arisen from the difference in their
refractive indices because of the difference in their fiber densities
and hence the variation in the silica content, leading to a different
optical signature