Sub-picosecond biphasic ultrafast all-optical switching in ultraviolet band

Dong Xiaoxiang; He Yonglin; Zhu Tao; Gao Renxian; Hu Lingyun; Li Jiayu; Ren Peiwen; Li Jian-Feng; Li Ming-De; Yang Zhilin

doi:10.1515/nanoph-2024-0415

Nanophotonics (Oct 2024)

Sub-picosecond biphasic ultrafast all-optical switching in ultraviolet band

Dong Xiaoxiang,
He Yonglin,
Zhu Tao,
Gao Renxian,
Hu Lingyun,
Li Jiayu,
Ren Peiwen,
Li Jian-Feng,
Li Ming-De,
Yang Zhilin

Affiliations

Dong Xiaoxiang: College of Physical Science and Technology, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen361005, China
He Yonglin: College of Physical Science and Technology, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen361005, China
Zhu Tao: College of Physical Science and Technology, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen361005, China
Gao Renxian: College of Physical Science and Technology, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen361005, China
Hu Lingyun: College of Chemistry and Chemical Engineering, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen361005, China
Li Jiayu: Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong515063, P.R. China
Ren Peiwen: College of Physical Science and Technology, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen361005, China
Li Jian-Feng: College of Chemistry and Chemical Engineering, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen361005, China
Li Ming-De: Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong515063, P.R. China
Yang Zhilin: College of Physical Science and Technology, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen361005, China

DOI: https://doi.org/10.1515/nanoph-2024-0415
Journal volume & issue: Vol. 13, no. 24
pp. 4451 – 4458

Abstract

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Ultrafast all-optical control has been a subject of wide-spread attention as a method of manipulating optical fields using light excitation on extremely short time scales. As a fundamental form of ultrafast all-optical control, all-optical switching has achieved sub-picosecond switch speeds in the visible, infrared, and terahertz spectral regions. However, due to the lack of suitable materials, ultrafast all-optical control in the ultraviolet range remains in its early stages. We demonstrate sub-picosecond all-optical switching in the ultraviolet wavelength by designing a Si3N4-ITO Fabry–Pérot resonance aligns with the edge of the interband transition region of ITO. The response time of 500 fs achieved at a pump fluence as low as 0.17 mJ/cm2. Notably, unlike conventional binary switches (0, 1), this biphasic all-optical switch enables the modulation of optical intensity with positive, zero, and negative ΔR/R (0, 1, −1) at the same wavelength, all achieved with a switching speed of 680 fs at a pump fluence of 0.45 mJ/cm2. This work establishing a new pathway for all-optical control in the ultraviolet spectrum, the biphasic switch provides an extra degree of freedom for all-optical modulation.

Published in Nanophotonics

ISSN: 2192-8606 (Print); 2192-8614 (Online)
Publisher: De Gruyter
Country of publisher: Germany
LCC subjects: Science: Physics
Website: https://www.degruyter.com/journal/key/nanoph/html#submit

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