The dependence of speckle contrast on velocity: A numerical study

We study how the speckle contrast depends on scatterer velocity, with the goal of further developing laser speckle imaging as a quantitative measurement technique. To that end, we perform interferometric computer simulations on a dilute plug flow. The results of our numerical experiment, that we compare with known analytical expressions to...

Scattering control of optical nano-antennas with designed excitations

Interferometric scattering of light by an ensemble of flowing spherical particles: Extracting a heartbeat from a pulsatile flow

Due to the increasing problem of cardiovascular diseases, the demand for diagnosing measurements is also increasing. These measurements should be cheap, nondestructive, accurate and real-time. Measurements like these already exist in the form of photoplethysmography (PPG). However, these measurements make use of a scalar quantity which throws...

The Influence of Particle Size Distribution and Shell Imperfections on the Plasmon Resonance of Au and Ag Nanoshells

Au and Ag nanoshells are of interest for a wide range of applications. The plasmon resonance of such nanoshells is the property of interest and can be tuned in a broad spectral regime, ranging from the ultraviolet to the mid-infrared. To date, a large number of manuscripts have been published on the optics of such nanoshells. Few of these,...