OPTICAL FIBER-TIP NANO SENSING (OPERAS)

Ultra-compact sensors that can detect single nanoscale objects are presently highly desirable. However, state-of-the-art sensors lack selectivity and the concurrent detection of multiple analytes.

Thus, OPERAS seeks to build an enhanced class of highly selective and sensitive fiber-tip sensors based on nanophotonics and plasmonics that can be easily multiplexed.

Its distinctiveness stems from the introduction of quantum perturbation method (QPM) for nanoparticles' susceptibilities, full vector beam propagation method (FVBPM) for fiber sensor optimization, and gold nanoparticles immobilization protocol on the end facet of an optical fiber to fabricate the sensing probe.

These methods are not only reproducible but also allow real-time monitoring of the fabrication process, making batch sensor fabrication feasible.

With the combination of optical phenomena at the nanoscale, optical fiber technology, and advanced simulation based on the QPM and FVBPM, OPERAS seeks to create synergistic nanospectroscopic sensors for uses in a variety of fields.

The fabricated sensors will be tested for the detection of nanoplastics and heavy metals in water at concentrations as low as nanograms per liter. Other applications including disease diagnosis and environmental monitoring are also foreseen.

Although the sensor has good selectivity and hypersensitivity due to the QPM and FVBPM, its implementation through the use of an optical fiber makes the sensor compact, safe to use, and easy to interrogate.

This creative and well-organized project will undoubtedly yield numerous important research outputs that will further our understanding of the exposure of people to nano objects, highlight and support European research in this area, help establish an affordable sensing technology, and improve environmental and healthcare monitoring.

Unquestionably, OPERAS is expected to bring a breakthrough in optical sensor technology and contribute to the development of new sensing technology in Europe.