Tellurium Metasurface Beam Splitter with Pulse Laser-Controlled Anisotropy

Takuto Hiraoka; Mizuho Matoba; Yuta Kobayashi; Arata Mitsuzuka; Masashi Kawaguchi; Haruyuki Sakurai; Kuniaki Konishi; Masamitsu Hayashi

arXiv · 2607.11265

Tellurium Metasurface Beam Splitter with Pulse Laser-Controlled Anisotropy

Takuto Hiraoka·Mizuho Matoba·Yuta Kobayashi·Arata Mitsuzuka·Masashi Kawaguchi·Haruyuki Sakurai·Kuniaki Konishi·Masamitsu Hayashi

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Abstract

Laser-programmable optical anisotropy offers a new route to developing reconfigurable metasurfaces without conventional nanofabrication processes. Here, we demonstrate a lithography-free approach based on spatial control of the crystallographic $c$ axis orientation in tellurium (Te) using pulse laser irradiation. As a proof of concept, we demonstrate a Te metasurface beam splitter by laser-written optical-axis patterning and experimentally confirm that its optical response is in good agreement with theoretical predictions and numerical simulations. By directly programming the local optical anisotropy, this method enables a simple fabrication process while offering the possibility of rewriting and dynamically reconfiguring device functionality. These features make this approach a promising platform for non-resonant active metasurfaces and other reconfigurable flat-optics applications.

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Takuto Hiraoka, Mizuho Matoba, Yuta Kobayashi, Arata Mitsuzuka, Masashi Kawaguchi, Haruyuki Sakurai, Kuniaki Konishi, Masamitsu Hayashi. 2026-07-13. Tellurium Metasurface Beam Splitter with Pulse Laser-Controlled Anisotropy. https://arxiv.org/abs/2607.11265

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