Abstract
This UCF invention introduces a remote, non-invasive optical instrument that uses dark hollow (ring-shaped) beams to probe ultra-weak interfacial fluctuations with unprecedented sensitivity. By creating a true zero-background condition, this technology achieves breakthrough detection of phenomena invisible to conventional methods. Measurements are performed along the illumination axis and orthogonal to the interface, enabling detection of thermal and structural signals that conventional scattering misses, including nonequilibrium phenomena at liquid–vapor boundaries.
Technical Details: The instrument generates dark hollow beams (e.g.,
Laguerre–Gauss, Bessel–Gauss) using an SLM or axicon and reflects them at
normal incidence from the interface. A fixed on-axis detector records light
scattered into the beam’s dark core by interfacial inhomogeneities. Adjusting
beam radius/width electronically emulates changing scattering angle, avoiding
moving parts. Characterization in proof-of-principle studies includes SIMS/XRD
not required here; optical detection via high-sensitivity camera (photon-counting
optional) and analysis versus temperature/time capture equilibrium and
nonequilibrium behavior. Optional azimuthal polarization can further enhance
on-axis signal.
Benefit
Ultrasensitive Detection: True dark-field center yields high SNR for subtle fluctuations.Simplified Alignment: Single-axis detection removes scanning hardware.Low Cost & Scalable: Uses standard lasers and beam-shaping; suitable for integration.Works in Nonequilibrium: Resolves evaporation/condensation dynamics in real time.Market Application
Industrial Process Control: Distillation, evaporators, coating lines, MBE and in-line metrology.Chemical & Materials R&D: Thin-film growth, membrane dynamics, colloids, phase transitions.Pharma & Biotech: Protein interfaces, droplet microfluidics, stability monitoring.Environmental & Safety: Remote sensing of interfaces in monitoring systems.
Brochure
