Dylan M. Marques
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View article: High-resolution imaging of ultrasonic fields through a multimode optical fiber
High-resolution imaging of ultrasonic fields through a multimode optical fiber Open
High-resolution ultrasound and photoacoustic imaging with flexible, lightweight probes is highly desirable for applications ranging from handheld clinical diagnostics to minimally invasive endoscopy and industrial inspection in confined en…
Localized measurement of ultrasonic waves using a Fabry–Perot sensor illuminated by a Bessel beam Open
Fabry–Perot (FP) ultrasound sensors are a class of optical ultrasound sensors used in photoacoustic tomography (PAT) and other applications. Conventionally, an FP ultrasound sensor comprises an ultrasonically compressible planar microcavit…
View article: Spatially resolved readout of a Fabry–Perot ultrasound sensor interrogated through a multimode optical fiber using wavefront shaping
Spatially resolved readout of a Fabry–Perot ultrasound sensor interrogated through a multimode optical fiber using wavefront shaping Open
The spatially resolved interrogation of a Fabry–Perot ultrasound sensor using a laser beam focused through a multimode fiber is demonstrated. To scan the beam across the sensor as required to read it out, optical wavefront shaping was empl…
Increasing the Q-factor of Fabry–Perot etalons using focused Bessel beam illumination Open
Sensing and filtering applications often require Fabry–Perot (FP) etalons with an Interferometer Transfer Function (ITF) having high visibility, narrow Full Width at Half Maximum (FWHM), and high sensitivity. For the ITF to have these char…
ABCD transfer matrix model of Gaussian beam propagation in Fabry-Perot etalons Open
A numerical model of Gaussian beam propagation in planar Fabry-Perot (FP) etalons is presented. The model is based on the ABCD transfer matrix method. This method is easy to use and interpret, and readily connects models of lenses, mirrors…
Numerical model of light propagation through Fabry-Perot etalons composed of interfaces with non-planar surface topography Open
We present a model that calculates optical fields reflected and transmitted by a Fabry-Perot (FP) etalon composed of interfaces with non-planar surface topography. The model uses the Rayleigh-Rice theory, which predicts the fields reflecte…
The visible and near-infrared optical absorption coefficient spectrum of Parylene C measured by transmitting light through thin films in liquid filled cuvettes Open
Parylene C (PPXC) is a polymer deposited from the gas phase to form optically clear thin films used in devices including waveguides and sensors. The performance of these devices depends on the visible and near infrared absorption coefficie…
Angular Airy function: a model of Fabry-Perot etalons illuminated by arbitrary beams Open
Fabry-Perot (FP) etalons are used as filters and sensors in a range of optical systems. The reflected and transmitted fields associated with an FP etalon have traditionally been predicted by the Airy function, which assumes a plane wave il…
Analysing the impact of non-parallelism in Fabry-Perot etalons through optical modelling Open
Fabry-Perot (FP) etalons, composed of two parallel mirrors, are used widely as optical filters and sensors. In certain applications, however, such as when FP etalons with polymer cavities are used to detect ultrasound, the mirrors may not …
Parylene C absorption coefficient spectrum Open
Optical absorption coefficient spectrum of Parylene C thin films obtained by measuring the transmittance of multiple films in liquid filled cuvettes as described in the paper.
Modelling Fabry-Pérot etalons illuminated by focussed beams Open
Fabry-Pérot (FP) etalons are used as filters and sensors in a range of optical systems. Often FP etalons are illuminated by collimated laser beams, in which case the transmitted and reflected light fields can be calculated analytically usi…
Ellipsometry and differential interference contrast microscopic imaging of cellular exoand endocytosis: modelling and experiments Open
In this work it is presented a solution to Maxwell’s equations for core-shell nanoparticle scattering near an isotropic substrate covered with an anisotropic thin film, based on an extension of the Bobbert-Vlieger (BV) solution for particl…