Dr. Christopher M. Collier Profile

Dr. Christopher M. Collier

at Univ of British Columbia

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 12 March 2024 Presentation + Paper

Optical nonlinearities in silicon under extreme intensities in the optical communication (C-band) spectrum

Matthias Jenne, Isaac Spotts, Christopher Collier, Jonathan Holzman

Proceedings Volume 12891, 1289103 (2024) https://doi.org/10.1117/12.3001964

KEYWORDS: Silicon, Absorption, Photocurrent, Autocorrelation, Photodiodes, Nonlinear optics, Light absorption, Optical communications, Electric fields, Ultrafast phenomena

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Proceedings Article | 28 September 2023 Poster + Paper

A lock-in amplifier biosensor for dairy applications

Jasen Devasagayam, Camille Leclerc, Malley Richardson, Christopher G. Ty, Abdulla AlSawalhi, Sean Worthington, Christopher Collier

Proceedings Volume 12661, 126610D (2023) https://doi.org/10.1117/12.2672817

KEYWORDS: Fluorescence spectroscopy, Biosensors, Fluorescence, Microfluidics, Signal detection, Lab on a chip, Agriculture

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Proceedings Article | 1 August 2021 Presentation + Paper

Spatial light modulation and optical mixing for snapshot hyperspectral imaging architectures

C. Harrison Brodie, Christopher Collier

Proceedings Volume 11836, 118360M (2021) https://doi.org/10.1117/12.2594261

KEYWORDS: Liquid crystals, Modulation, Sensors, Hyperspectral imaging, Light emitting diodes, Imaging systems, Photodiodes, Digital imaging

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Proceedings Article | 1 August 2021 Presentation + Paper

A scalable digital microfluidic platform for automation of onsite testing of dairy samples

Rahul Eswar, C. Harrison Brodie, Christopher Collier

Proceedings Volume 11810, 118100N (2021) https://doi.org/10.1117/12.2594613

KEYWORDS: Electrodes, Microfluidics, Dielectrics, Switching, Microcontrollers, Control systems, Video, Proteins, Human-machine interfaces, Fluorescence spectroscopy

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Proceedings Article | 1 August 2021 Presentation + Paper

A comparison of nonlinear filtering methods for blackbody radiation applications in photonics

Isaac Spotts, C. Harrison Brodie, S. Andrew Gadsden, Mohammad AlShabi, Christopher Collier

Proceedings Volume 11841, 118410O (2021) https://doi.org/10.1117/12.2594674

KEYWORDS: Filtering (signal processing), Temperature metrology, Optical filters, Nonlinear filtering, Black bodies, Electronic filtering, Systems modeling, Interference (communication), Photonics, Linear filtering

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Proceedings Article | 3 March 2020 Presentation + Paper

Graphene material characterisation for optofluidic applications

Michelle Del Rosso, C. Harrison Brodie, Christopher Collier

Proceedings Volume 11276, 112760P (2020) https://doi.org/10.1117/12.2538295

KEYWORDS: Graphene, Optical lithography, Electrodes, Microsystems, Microopto electromechanical systems, Microfluidics, Optofluidics, Optical discs, Material characterization

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Proceedings Article | 2 March 2020 Presentation + Paper

Lock-in optical instrumentation for snapshot hyperspectral imaging

C. Harrison Brodie, Jasen Devasagayam, Christopher Collier

Proceedings Volume 11287, 1128710 (2020) https://doi.org/10.1117/12.2538484

KEYWORDS: Sensors, Charge-coupled devices, CCD image sensors, Binary data, Coded apertures, Hyperspectral imaging, Diffraction, Spectroscopy, Fourier transforms, Compact discs

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Proceedings Article | 2 March 2020 Presentation + Paper

Enhanced optical absorption in droplet-based microfluidics for on-chip polymerase chain reactions

Isaac Spotts, Camille Leclerc, Christopher Collier

Proceedings Volume 11287, 112870F (2020) https://doi.org/10.1117/12.2544304

KEYWORDS: Biomedical optics, Microfluidics, Absorption, Finite-difference time-domain method, Infrared cameras, Polymers, Microelectromechanical systems, Gaussian beams, Thermography, Temperature metrology

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Proceedings Article | 25 February 2020 Paper

A scalable fibre optic sensing architecture for lab-on-a-chip devices

Isaac Spotts, Camille Leclerc, Dima Ismail, Noor Jaffar, Christopher Collier

Proceedings Volume 11283, 112831Z (2020) https://doi.org/10.1117/12.2544379

KEYWORDS: Microfluidics, Sensors, Lab on a chip, Electrodes, Sensing systems, Integrated optics, Point-of-care devices, Mathematical modeling, Biomedical optics, Refractive index

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Proceedings Article | 25 February 2020 Paper

A fluorescence spectroscopy biosensor for lab-on-a-chip detection of antibiotics in milk

Rick Bosma, Jasen Devasagayam, Ashutosh Singh, Christopher Collier

Proceedings Volume 11283, 112831O (2020) https://doi.org/10.1117/12.2539540

KEYWORDS: Biosensors, Lab on a chip, Fluorescence spectroscopy, Microfluidics, Electrodes, Photodiodes, Light emitting diodes, Ultraviolet radiation, Sensors, Ultraviolet light emitting diodes

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Proceedings Article | 25 February 2016 Paper

Textured semiconductors for enhanced photoconductive terahertz emission

Christopher Collier, Jeffrey D. Krupa, Ilija Hristovski, Trevor Stirling, Mark Bergen, Jonathan Holzman

Proceedings Volume 9747, 97470M (2016) https://doi.org/10.1117/12.2208548

KEYWORDS: Semiconductors, Terahertz radiation, Antennas, Picosecond phenomena, Electro optics, Millimeter wave sensors, Indium, Semiconductor materials, Image analysis, Scanning electron microscopy, Ultrafast phenomena, Surface finishing, Laser beam diagnostics, Polishing

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Proceedings Article | 24 February 2016 Paper

Spherical transceivers for ultrafast optical wireless communications

Xian Jin, Blago Hristovski, Christopher Collier, Simon Geoffroy-Gagnon, Brandon Born, Jonathan Holzman

Proceedings Volume 9744, 97440F (2016) https://doi.org/10.1117/12.2208343

KEYWORDS: Transceivers, Retroreflectors, Ultrafast phenomena, Modulation, Wireless communications, Modulators, Optical switching, Interfaces, Beam controllers, Refractive index, Nonlinear optics, Switches

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SPIE Journal Paper | 1 February 2015 Open Access

Nanophotonic implementation of optoelectrowetting for microdroplet actuation

Christopher Collier, Kyle Hill, Mark DeWachter, Jonathan Holzman, Alexander Huizing

JBO, Vol. 20, Issue 02, 025004, (February 2015) https://doi.org/10.1117/12.10.1117/1.JBO.20.2.025004

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Proceedings Article | 8 May 2014 Paper

Dielectrophoresis microjets: a merging of electromagnetics and microfluidics for on-chip technologies

Kyle Hill, Christopher Collier, Jonathan Holzman

Proceedings Volume 9129, 912931 (2014) https://doi.org/10.1117/12.2052030

KEYWORDS: Dielectrophoresis, Microfluidics, Dielectrics, Electromagnetism, Control systems, Electrodes, Scanning electron microscopy, Lab on a chip, Biomedical optics, Copper

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Proceedings Article | 8 May 2014 Paper

Optoelectrowetting for continuous microdroplet actuation

Christopher Collier, Kyle Hill, Mark DeWachter, Alex Huizing, Jonathan Holzman

Proceedings Volume 9129, 91293Q (2014) https://doi.org/10.1117/12.2052040

KEYWORDS: Microfluidics, Nanocomposites, Nanoparticles, Electrodes, Semiconductors, Diffusion, Dielectrics, Switches, Mirrors, Silicon

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Proceedings Article | 8 May 2014 Paper

Retroreflective imaging systems for enhanced optical biosensing

Mark Bergen, Jacqueline Nichols, Christopher Collier, Xian Jin, Jonathan Holzman

Proceedings Volume 9129, 912914 (2014) https://doi.org/10.1117/12.2052523

KEYWORDS: Retroreflectors, Optical spheres, Imaging systems, Microorganisms, Collimation, Refractive index, Biosensing, Spherical lenses, Image sensors, Glasses

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Biosensing is important for detection and characterization of microorganisms. When the detection and characterization of targeted microorganisms require micron-scale resolutions, optical biosensing techniques are especially beneficial. Optical biosensing can be applied through direct or indirect optical sensing techniques. The latter have demonstrated especially high sensitivities for the detection of targeted microorganisms with labeling. Unfortunately, such systems rely on high-resolution microscopy with microscopic sampling areas to image the labeled target microorganisms. This leads to long characterization times for applications such as pathogen detection in water quality monitoring where users must scan the micron-scale sampling areas across millimeter- or even centimeter-scale samples. This work introduces retroreflector labels for the detection and characterization of microorganisms for macroscopic sample sizes. The demonstrated retroreflective imaging system uses a laser source to illuminate the sample, in lieu of the fluorescent excitation source, and micron-scale retroreflector labels, in lieu of fluorescent stains/proteins. Antibodies are used to bind retroreflectors to targeted microorganisms. The presence of these microscopic retroreflector-microorganism pairs is monitored in a retroreflected image that is captured by a distant image sensor which shows a well-localized retroreflected beamspot for each pair. Characteristics of an appropriately-designed retroreflective imaging system which provide a quantifiable record of microorganism-coupled retroreflectors across macroscopic sample sizes are presented. Retroreflection directionality, collimation, and contrast are investigated for both corner-cube retroreflectors and spherical retroreflectors (of varying refractive indices). It is ultimately found that such a system is an effective tool for the detection and characterization of microorganism targets, down to a single-target detection limit.

Proceedings Article | 28 September 2013 Paper

Ultrafast spectroscopy of hot electron and hole dynamics in GaP

Christopher Collier, Brandon Born, Xian Jin, Jonathan Holzman

Proceedings Volume 8845, 88450U (2013) https://doi.org/10.1117/12.2023798

KEYWORDS: Phonons, Picosecond phenomena, Scattering, Gallium arsenide, Ultrafast phenomena, Terahertz radiation, Absorption, Ultrafast laser spectroscopy, Semiconductors, Carrier dynamics

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Proceedings Article | 25 September 2013 Paper

Ultrafast transient characteristics of photoconductive elements for optical wireless communications

X. Jin, C. Collier, J. J. A. Garbowski, B. Born, J. Holzman

Proceedings Volume 8847, 884710 (2013) https://doi.org/10.1117/12.2024296

KEYWORDS: Picosecond phenomena, Sensors, Ultrafast phenomena, Optoelectronics, Transient nonlinear optics, Visible radiation, Optoelectronic devices, Wireless communications, Neodymium, Switches

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Proceedings Article | 24 September 2013 Paper

Transient mobility and photoconductive terahertz emission with GaP

Christopher Collier, Brandon Born, Xian Jin, Timothy Westgate, Max Bethune-Waddell, Mark Bergen, Jonathan Holzman

Proceedings Volume 8846, 884616 (2013) https://doi.org/10.1117/12.2023764

KEYWORDS: Terahertz radiation, Gallium arsenide, Electrons, Picosecond phenomena, Scattering, Plasma, Semiconductors, Ultrafast phenomena, Surface finishing, Near field

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Proceedings Article | 13 September 2013 Paper

Practical nanophotonic architectures for ultrafast all-optical switching

B. Born, C. Collier, J. Holzman

Proceedings Volume 8807, 88070G (2013) https://doi.org/10.1117/12.2024398

KEYWORDS: Picosecond phenomena, Switching, Silicon carbide, Optical spheres, Semiconductors, Adaptive optics, Photonic nanostructures, Silicon, Nanoparticles, Gallium arsenide

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SPIE Journal Paper | 11 June 2012 Open Access

On-chip digital microfluidic architectures for enhanced actuation and sensing

Jacqueline Nichols, Christopher Collier, Emily Landry, Michael Wiltshire, Brandon Born, Jonathan Holzman

JBO, Vol. 17, Issue 6, 067005, (June 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.6.067005

KEYWORDS: Microfluidics, Refractive index, Electrodes, Microlens, Multiplexers, Optical signal processing, Microfluidic imaging, Sensing systems, Image sensors, Capacitance

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Proceedings Article | 21 February 2012 Paper

Ultrafast optical analyses and characteristics of nanocomposite media

Christopher Collier, Xian Jin, Brandon Born, Jonathan Holzman

Proceedings Volume 8260, 826012 (2012) https://doi.org/10.1117/12.908970

KEYWORDS: Refractive index, Actinium, Interferometry, Nanocomposites, Spatial coherence, Ultrafast phenomena, Nanoparticles, Refractometry, Silicon carbide, Polymers

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Proceedings Article | 14 February 2012 Paper

Optical sensing for on-chip digital microfluidics

Jacqueline Nichols, Emily Landry, Brandon Born, Michael Wiltshire, Christopher Collier, Jonathan Holzman

Proceedings Volume 8251, 82510L (2012) https://doi.org/10.1117/12.909390

KEYWORDS: Microfluidics, Electrodes, Microlens, Multiplexers, Refractive index, Optical sensing, Capacitance, Microfluidic imaging, Multiplexing, Transformers

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Showing 5 of 23 publications

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