{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T00:36:55Z","timestamp":1776904615909,"version":"3.51.2"},"reference-count":77,"publisher":"MDPI AG","issue":"22","license":[{"start":{"date-parts":[[2025,11,17]],"date-time":"2025-11-17T00:00:00Z","timestamp":1763337600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Xi\u2019an Jiaotong-Liverpool University Research Development Fund","award":["RDF-23-02-001"],"award-info":[{"award-number":["RDF-23-02-001"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>With the increasing demand for ultrafast optical signal processing, silicon-on-silica (SoS) waveguides with ring resonators have emerged as a promising platform for integrated all-optical logic gates (AOLGs). In this work, we design and simulate a SoS-based waveguide structure, operating at the telecommunication wavelength of 1550 nm, consisting of a circular ring resonator coupled to straight bus waveguides using Lumerical FDTD solutions. The design achieves a high Q-factor of 11,071, indicating low optical loss and strong light confinement. The evanescent coupling between the ring and waveguides, along with optimized waveguide dimensions, enables efficient interference, realizing a complete suite of AOLGs (XOR, AND, OR, NOT, NOR, NAND, and XNOR). Numerical simulations demonstrate robust performance across all gates, with high contrast ratios between 11.40 dB and 13.72 dB and an ultra-compact footprint of 1.42 \u00d7 1.08 \u00b5m2. The results confirm the device\u2019s capability to manipulate optical signals at data rates up to 55 Gb\/s, highlighting its potential for scalable, high-speed, and energy-efficient optical computing. These findings provide a solid foundation for the future experimental implementation and integration of SoS-based photonic logic circuits in next-generation optical communication systems.<\/jats:p>","DOI":"10.3390\/nano15221736","type":"journal-article","created":{"date-parts":[[2025,11,17]],"date-time":"2025-11-17T14:04:07Z","timestamp":1763388247000},"page":"1736","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Silicon-on-Silica Microring Resonators for High-Quality, High-Contrast, High-Speed All-Optical Logic Gates"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3776-822X","authenticated-orcid":false,"given":"Amer","family":"Kotb","sequence":"first","affiliation":[{"name":"School of Chips, XJTLU Entrepreneur College (Taicang), Xi\u2019an Jiaotong-Liverpool University, Suzhou 215400, China"},{"name":"Department of Physics, Faculty of Science, University of Fayoum, Fayoum 63514, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8943-6641","authenticated-orcid":false,"given":"Antonios","family":"Hatziefremidis","sequence":"additional","affiliation":[{"name":"Department of Aerospace Science and Technology, National Kapodistrian University of Athens, 34400 Psahna Evias, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kyriakos E.","family":"Zoiros","sequence":"additional","affiliation":[{"name":"Lightwave Communications Research Group, Department of Electrical and Computer Engineering, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,11,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"728","DOI":"10.1109\/5.867687","article-title":"Rationale and challenges for optical interconnects to electronic chips","volume":"88","author":"Miller","year":"2000","journal-title":"Proc. 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