1.2.2 - Circuit-free Cardiovascular Monitoring via Electrically Passive Nanophotonic Patch for Sub-beat Hemodynamics
- Event
- EUROSENSORS 2026
2026-09-06 - 2026-09-09
Zurich - Band
- Lectures
- Chapter
- Optical Sensors
- Author(s)
- T. Steffensen, V. Stubberud, E. Winogrocki, E. Hennissen, N. K. Skjærvold, M. Steinert, A. Xomalis - Norwegian University of Science and Technology,Trondheim (Norway)
- Pages
- 50 - 51
- DOI
- 10.5162/eurosensors2026/1.2.2
- ISBN
- 978-3-910600-12-6
- Price
- free
Abstract
We report on a monolithic nanophotonic patch (OptoPatch) that converts arterial pulsation into camerareadable colour shifts via mechanochromic diffraction, removing the need for on-body electronics, batteries, or external optics. A single-material PDMS film carries a strain-sensitive metasurface on one face and a suction-cup adhesive on the other. In 13 volunteers recorded under hand-held smartphone imaging, OptoPatch recovers high-fidelity pulse waves, essential for highly deployable cardiovascular monitoring, and accesses inter-beat hemodynamics. Signal extraction is improved by gridded ROI tracking combined with harmonic SNR estimation.