[2608.14447] Angular displacement readout of a mechanical oscillator with a guided mode resonance Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Physics > Optics arXiv:2608.14447 (physics) [Submitted on 14 Aug 2026] Title: Angular displacement readout of a mechanical oscillator with a guided mode resonance Authors: Diego Torres-Barajas , Oscar Angulo , Aman R. Agrawal , Mohamed ElKabbash , Dalziel J. Wilson View a PDF of the paper titled Angular displacement readout of a mechanical oscillator with a guided mode resonance, by Diego Torres-Barajas and 4 other authors View PDF HTML (experimental) Abstract: Measuring the angular displacement of a mechanical oscillator is a ubiquitous task; however, the multimode nature of angular optomechanical coupling makes coherent signal enhancement challenging. Here we demonstrate coherently enhanced angular displacement readout with an integrated guided mode resonance (GMR) structure, applying it to precision readout of a nanomechanical oscillator. Specifically, we fabricate subwavelength gratings into 100-nm-thick Si$_3$N$_4$ membranes and record their vibration by direct transmission measurements. The narrow linewidth $\approx 2.5\;\text{mrad}$ of the GMR enables a shot-noise-limited displacement imprecision of $ 10^{-9}\;\text{rad}/\sqrt{\text{Hz}}$ with nanowatts of optical power, sufficient to resolve the thermal motion of a $Q\approx 10^6$ torsion mode with a signal-to-noise ratio of 47 dB. Control experiments based on polarization and wavelength detuning confirm that the measured signal arises from GMR-mediated transduction. These results establish guided-mode resonance as an on-chip approach to angular displacement readout in quantum optomechanical sensors. Comments: 7 pages, 7 figures Subjects: Optics (physics.optics) ; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Instrumentation and Detectors (physics.ins-det); Quantum Physics (quant-ph) Cite as: arXiv:2608.14447 [physics.optics] (or arXiv:2608.14447v1 [physics.optics] for this version) https://doi.org/10.48550/arXiv.2608.14447 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Dalziel Wilson [ view email ] [v1] Fri, 14 Aug 2026 16:32:02 UTC (6,388 KB) Full-text links: Access Paper: View a PDF of the paper titled Angular displacement readout of a mechanical oscillator with a guided mode resonance, by Diego Torres-Barajas and 4 other authors View PDF HTML (experimental) TeX Source view license Current browse context: physics.optics < prev | next > new | recent | 2026-08 Change to browse by: cond-mat cond-mat.mes-hall physics physics.ins-det quant-ph References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab) Major funding support from