Session Overview |
Biophotonics - Bloc 4Room: International 1 |
Date: Thursday, June 07 |
13:15 |
A high Q-factor optical resonator induced by a water droplet in a silica microcapillary
Main Author: Tabassom Hamidfar Organization: Concordia University, Canada We demonstrate that a liquid droplet in a silica microcapillary can trap and localize the whispering gallery modes and produce a high Q-factor microresonator. This discovery leads to a novel advanced approach in microfluidic sensing. |
13:30 |
Bacterial Detection Using Metallic Flow-Through Nanohole Arrays
Main Author: Juan Gomez-Cruz Organization: Queen's University - Universidad Nacional Autónoma de México, Canada The commercialization forecast for handheld sensing technologies is very promising, but reliable, miniature and cost-effective sensing platforms that can adapt to portable electronics are still under development. In this work, we present a smartphone-compatible detection platform based on flow-through metallic nanohole arrays for the detection of uropathogenic E. coli. |
13:45 |
Characterization of the Photothermal Heating Properties of Nanoparticles by Terahertz Radiation
Main Author: Holger Breitenborn Organization: INRS-EMT, Canada In this study, we show how non-invasive non-contact terahertz (THz) reflectometry can be utilized to effectively characterize the photothermal heating properties of copper sulfide nanoparticle solutions. |
14:00 |
Wide-field Imaging of Microorganisms in Microfluidic Devices using a Mobile Phone
Main Author: Sara Kheireddine Organization: McGill University, Canada A mobile phone can be used as a relatively inexpensive, portable, and versatile imaging device that offers high spatial resolution as well as a large field-of-view for visualizing microorganisms within microfluidic devices. |
14:15 |
Surface nanostructuring for improved resolution in surface plasmon resonance imaging
Main Author: Frederic Alexandre Banville Organization: Université de Sherbrooke, Canada Surface plasmon resonance imaging (SPRI) is a very effective technique for studying surface phenomena in complex biological materials. However, its spatial resolution is limited by the propagative nature of the surface plasmons. In this work, we demonstrate that nanostructuring the metal surface results in a significantly reduced mode propagation and consequently a higher resolution in SPRI. The work is supported by both detailed numerical modeling and parameter estimation from experimental data. |
14:30 |
Portable Mid-IR Hyperspectral Imager - Microxcam-384i-HS
Main Author: Hélène Spisser Organization: Institut National d'Optique (INO), Canada In this paper, we present Microxcam-384i-HS, an application development kit for hyperspectral imaging in the 3-11 µm wavelength range. This low-cost and portable system allows for the exploration of hyperspectral imaging applications in the mid-infrared fingerprint region where spectral shapes provide enhanced discrimination in chemical compound analysis. Food and mineral samples have been tested, demonstrating the imaging and spectroscopic capabilities of the system. |
14:45 |
Comparison of Deep Learning Architectures For Pre-Screening of Breast Cancer Thermograms
Main Author: Juan Carlos Torres-Galván Organization: Universidad Autónoma de San Luis Potosí, Mexico Infrared thermography can be used for pre-screening of breast cancer but the results of this technique depend on the experience of the human expert. We propose an automated analysis approach to assess the capabilities of deep neural networks to classify breast thermograms. The dataset consisted of 173 images and we compared seven deep learning architectures. VGG-16 convolutional neural network outperformed with a sensitivity of 100% , specificity of 82.35% and balanced accuracy of 91.18%. Such results indicate that deep neural networks can be used in the analysis of thermal images for breast cancer pre-screening. |