Reciprocal asymmetric transmission in self-shadowed metallized gratings
Abstract
A single oblique metallization step gives conventional gratings one-sided silver decoration, established by electron microscopy and elemental mapping. Opposite-face reversal measurements yield finite-aperture red/green/blue transmission ratios up to 1.74 for a 1-μm grating and 1.5-1.8 for a 30-μm grating, with reference-normalized transmittances for the latter. Flat-side coating and reduced silver dose give ratios near unity. Maxwell calculations on self-shadowed growth profiles reproduce the directional sign qualitatively and attribute the contrast to diffraction-channel redistribution. The structure remains reciprocal, including its normal-incidence zeroth-order transmission. These results establish directional metallization as a route to direction-selective optical transmission without multilayer alignment or overlay lithography.
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BibTeX
@misc{yesilyurt2026reciprocal,
title = {{Reciprocal asymmetric transmission in self-shadowed metallized gratings}},
author = {Can Yesilyurt},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2609.01755},
eprint = {2609.01755},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.01755},
}
RIS
TY - UNPB
TI - Reciprocal asymmetric transmission in self-shadowed metallized gratings
AU - Can Yesilyurt
PY - 2026
DA - 2026/10/04
PB - arXiv
DO - 10.48550/arxiv.2609.01755
UR - https://arxiv.org/abs/2609.01755
AB - A single oblique metallization step gives conventional gratings one-sided silver decoration, established by electron microscopy and elemental mapping. Opposite-face reversal measurements yield finite-aperture red/green/blue transmission ratios up to 1.74 for a 1-μm grating and 1.5-1.8 for a 30-μm grating, with reference-normalized transmittances for the latter. Flat-side coating and reduced silver dose give ratios near unity. Maxwell calculations on self-shadowed growth profiles reproduce the directional sign qualitatively and attribute the contrast to diffraction-channel redistribution. The structure remains reciprocal, including its normal-incidence zeroth-order transmission. These results establish directional metallization as a route to direction-selective optical transmission without multilayer alignment or overlay lithography.
ER -