Photocatalytic Oxidation in Few-Layer Tellurene for Loss-Invariant Integrated Photonic Resonance Trimming
Date
2023-05-05
Journal Title
Journal ISSN
Volume Title
Publisher
Advanced Optical Materials
Abstract
Two-dimensional (2D) materials with unique physicochemical properties promote photocatalytic activities. As the 2D material composites research studies the statistical average of complex catalytic behaviors, an integrated photonic platform allows for clean and single flake level photo-catalytic investigations with precisely quantified photocatalytic activities. In this paper, fluence-dependent photo-oxidation in two-dimensional Tellurene (2D Te) is tracked by the evanescently coupled micro-resonator. Nearly 32% of oxidation is achieved in ≈10 nm 2D Te flake, compared to only 4.5% oxidation in a 30 nm sample, probed by the resonance shift in silicon micro-ring resonators substrate. The wider bandgap in the few layers of 2D Te allows faster charge transfer to adsorbed oxygen for a more efficient photocatalytic redox reaction. The photo-oxidation in hybrid 2D Te results in invariant lineshapes of optical transmission resonance for wavelength trimming (more than 3× resonance bandwidth). The low threshold power, near-infrared, and in-waveguide resonance trimming scheme is compatible with most integrated photonic setups for easy fixing of the nanofabrication-induced random resonance deviation for integrated photonic circuit applications in wavelength-division-multiplexing systems and spin qubits quantum computing.
Description
This is the peer reviewed version of the following article: Mao, D., Wang, Y., Lee, H., Chang, L., Wang, F., Wu, D., Xiao, Y., Sun, B., Ullah, K., Booksh, K., Wu, W., Gu, T., Photocatalytic Oxidation in Few-Layer Tellurene for Loss-Invariant Integrated Photonic Resonance Trimming. Adv. Optical Mater. 2023, 2300192. https://doi.org/10.1002/adom.202300192, which has been published in final form at https://doi.org/10.1002/adom.202300192. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. © 2023 Wiley-VCH GmbH. This article will be embargoed until 05/05/2024.
Keywords
integrated photonics, micro-ring resonators, photo-oxidation, tellurium, two-dimensional materials, wavelength trimming
Citation
Mao, D., Wang, Y., Lee, H., Chang, L., Wang, F., Wu, D., Xiao, Y., Sun, B., Ullah, K., Booksh, K., Wu, W., Gu, T., Photocatalytic Oxidation in Few-Layer Tellurene for Loss-Invariant Integrated Photonic Resonance Trimming. Adv. Optical Mater. 2023, 2300192. https://doi.org/10.1002/adom.202300192