Cover Articles

Spotts et al., IEEE Journal of Selected Topics in Quantum Electronics Cover Article, Volume 29, Issue 5: Special Issue on Terahertz Photonics
Brodie et al., Optical Materials Express Cover Article, Volume 12, Issue 9
Devasagayam et al., Electrophoresis Back Cover Article, Volume 43, Issue 7-8

Bosma et al., Electrophoresis Cover Article, Volume 41, Issue 23

Journal Articles


[46] M. H. Bergen, S. N. Lowry, M. E. Mitchell, M. F. Jenne, C. M. Collier, and J. F. Holzman, “Terahertz wireless communication systems: Challenges and solutions for realizations of effective bidirectional links,” Optics Continuum, vol. 2, pp. 2154-2177, 2023. (Selected as Editors’ Pick)

[45] R. Eswar, C. H. Brodie, H. Reguigui, and C. M. Collier, “An integrated and automated digital microfluidic device for dairy milk droplet actuation,” Microsystem Technologies, vol. 9, pp. 1389-1398, 2023.

[44] S. Lepard, I. Spotts, C. H. BrodieC. A. Leclerc, R. Eswar, H. Li, and C. M. Collier, “A digital microfluidic chip with programmable open system actuation and enhanced optical annealing with near-infrared light,” Engineering Reports, e12737(1-12), 2023.

[43] C. H. BrodieI. Spotts, and C. M. Collier, “Terahertz Bragg structures fabricated with additive manufacturing,” Applied Optics, vol. 62, pp. 4465-4473, 2023.

[42] I. Spotts, C. H. Brodie, D. Saeedkia, S. A. Gadsden, and C. M. Collier, “Improved terahertz time-domain spectroscopy via the extended Kalman filter,” IEEE Journal of Selected Topics in Quantum Electronics, vol. 29, 8500312(1-12), 2023. (Cover Article)

[41] J. Devasagyam, C. A. LeclercR. Bosma, L. Wood, and C. M. Collier, “Lock-in amplifier dairy sensor for detection of ciprofloxacin,” IEEE Access, vol. 11, pp. 41697-41707, 2023.


[40] R. Eswar, C. H. Brodie, and C. M. Collier, “Lock-in amplified fluorescence spectroscopy in a digital microfluidic configuration for antibiotic detection of ciprofloxacin in milk,” IEEE/ASME Journal of Microelectromechanical Systems, vol. 31, pp. 927-934, 2022.

[39] C. H. BrodieI. Spotts, H. ReguiguiC. A. Leclerc, M. Mitchell, J. F. Holzman, and C. M. Collier, “Comprehensive study of 3D printing materials over the terahertz regime: Absorption coefficient and refractive index characterizations,” Optical Materials Express, vol. 12, pp. 3379-3402, 2022. (Cover article)

[38] I. SpottsC. H. BrodieC. A. Leclerc, S. A. Gadsden, M. Al-Shabi, and C. M. Collier, “Extended Kalman filter and extended sliding innovation filter in terahertz spectral acquisition,” Optics Continuum, vol. 1, pp. 1003-1014, 2022.

[37] J. DevasagayamR. Bosma, and C. M. Collier, “A velocity program using the Kanade-Lucas-Tomasi feature-tracking algorithm with demonstration for pressure and electroosmosis conditions,” Electrophoresis, vol. 43, pp. 865-878, 2022. (Back Cover article)


[36] S. Ramalingam, C. M. Collier, and A. Singh, “A paper-based colorimetric aptasensor for the detection of gentamicin,” Biosensors, vol. 11, 29(1-13), 2021.

[35] C. A. LeclercS. WilliamsC. PoweN. ZeppD. Lipworth, E. Pensini, and C. M. Collier, “Rapid design and prototyping of microfluidic chips via computer numerical control micromilling and anisotropic shrinking of stressed polystyrene sheets,” Microfluidics and Nanofluidics, vol. 25, 12(1-12), 2021.


[34] C. H. Brodie and C. M. Collier, “Single-point detection architecture via liquid crystal modulation for hyperspectral imaging systems,” IEEE Access, vol. 8, pp. 185012-185020, 2020.

[33] I. SpottsC. H. Brodie, S. A. Gadsden, M. Al-Shabi, and C. M. Collier, “Comparison of nonlinear filtering techniques for photonic systems with blackbody radiation,” Applied Optics, vol. 59, pp. 9303-9312, 2020.

[32] M. Del RossoS. LepardR. Eswar, and C. M. Collier, “Microfluidic fabrication with silver nanowires for optofluidic structures with three-dimensional operation,” Sensors and Actuators A: Physical, vol. 315, 112297(1-8), 2020.

[31] R. BosmaJ. DevasagayamR. EswarI. de Franca Albuquerque, and C. M. Collier, “Voltage control for microchip capillary electrophoresis analyses,” Electrophoresis, vol. 41, pp. 1961-1968, 2020. (Cover article)

[30] R. BosmaJ. Devasagayam, A. Singh, and C. M. Collier, “Microchip capillary electrophoresis dairy device using fluorescence spectroscopy for detection of ciprofloxacin in milk samples,” Scientific Reports, vol. 10, 13548(1-8), 2020. (Nature Research publishing group)

[29] A. Siwik, E. Pensini, B. Macias Rodriguez, A. G. Marangoni, C. M. Collier, and B. Sleep, “Effect of rheology and humic acids on the transport of environmental fluids in sandy media: Potential implications for soil remediation revealed through microfluidic analyses,” Journal of Applied Polymer Science, vol. 136, 48465(1-8), 2020.


[28] I. SpottsC. A. Leclerc, and C. M. Collier, “Scalable optical annealing of microfluidic droplets via whispering gallery mode geometry and infrared illumination,” Applied Optics, vol. 58, pp. 7904-7908, 2019.

[27] S. PrasadA. KadambiY. Alwehaibi, and C. M. Collier, “Mechanically-tuned optofluidic lenses for in-plane focusing of light,” OSA Continuum, vol. 2, pp. 2694-2703, 2019.

[26] M. Del RossoC. H. Brodie, S. Ramalingam, D. M. Cabral, E. Pensini, A. Singh, and C. M. Collier, “Characterisation of graphene electrodes for microsystems and microfluidic devices,” Scientific Reports, vol. 9, 5773(1-8), 2019. (Nature Research publishing group; featured as a News and Research Highlight by the University of Guelph College of Engineering and Physical Sciences)

[25] E. Pensini, B. Macias Rodriguez, A. G. Marangoni, C. M. Collier, A. Elsayed, and A. Siwik, “Shear rheological properties of composite fluids and stability of particle suspensions: Potential implications for fracturing and environmental fluids,” The Canadian Journal of Chemical Engineering, vol. 97, pp. 2395-2407, 2019

[24] C. H. BrodieJ. Devasagayam, and C. M. Collier, “A hyperspectral imaging instrumentation architecture based on accessible optical disc technology and frequency-domain analyses,” IEEE Transactions on Instrumentation and Measurement, vol. 68, pp. 1557-9662, 2019.

[23] A. Siwik, E. Pensini, A. Elsayed, B. Macias Rodriguez, A. G. Marangoni, and C. M. Collier, “Natural guar, xanthan and carboxymethyl-cellulose-based fluids: Potential use to trap and treat hexavalent chromium in the subsurface,” Journal of Environmental Chemical Engineering, vol. 7, 102807(1-7), 2019.


[22] E. Pensini, A. Elsayed, B. Macias Rodriguez, A. G. Marangoni, A. Singh, B. Sleep, G. Hayward, K. Lamont, and C. M. Collier, “In situ trapping and treating of hexavalent chromium using scleroglucan-based fluids: A proof of concept,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 559, pp. 192-200, 2018.

[21] I. SpottsD. IsmailN. Jaffar, and C. M. Collier, “Fibre-optic sensing in digital microfluidic devices,” Sensors and Actuators A: Physical, vol. 280, pp. 164-169, 2018.

[20] S. PrasadM. Del Rosso, J. R. Vale, and C. M. Collier, “Optofluidic lenses with horizontal-to-vertical aspect ratios in the subunit regime,” Applied Optics, vol. 57, pp. 5474-5482, 2018.

[19] R. Al-Hujazy and C. M. Collier, “Design considerations for integration of terahertz time-domain spectroscopy in microfluidic platforms,” Photonics, vol. 5, 5(1-10), 2018. (Special issue on Microwave Photonics)


[18] C. M. Collier, T. J. Stirling, S. Dekock-Kruger, and J. F. Holzman, “Spectral response tuning of photoconductive terahertz emitters with binary phase masks,” IEEE Journal of Selected Topics in Quantum Electronics, vol. 23, 8500406(1-6), 2017.


[17] B. Born, J. D. A. Krupa, S. Geoffroy-Gagnon, I. R. Hristovski, C. M. Collier, and J. F. Holzman, “Ultrafast charge-carrier dynamics of copper oxide nanocrystals,” ACS Photonics, vol. 3, pp. 2475-2481, 2016.

[16] B. Born, S. Geoffroy-Gagnon, J. D. A. Krupa, I. R. Hristovski, C. M. Collier, and J. F. Holzman, “Ultrafast all-optical switching via subdiffractional photonic nanojets and select semiconductor nanoparticles,” ACS Photonics, vol. 3, pp. 1095-1101, 2016.

[15] C. M. Collier, T. J. Stirling, I. R. Hristovski, J. D. A. Krupa, and J. F. Holzman, “Photoconductive terahertz generation from textured semiconductor materials,” Scientific Reports, vol. 6, 23185(1-10), 2016. (Nature Research publishing group)


[14] X. Jin, B. A. Hristovski, C. M. Collier, S. Geoffroy-Gagnon, B. Born, and J. F. Holzman, “Ultrafast all-optical technologies for bidirectional optical wireless communications,” Optics Letters, vol. 40, pp. 1583-1586, 2015.

[13] C. M. Collier, K. A. Hill, M. A. DeWachter, A. M. Huizing, and J. F. Holzman, “Nanophotonic implementation of optoelectrowetting for microdroplet actuation,” Journal of Biomedical Optics, vol. 20, 025004(1-5), 2015.

[12] C. M. Collier, M. H. Bergen, T. J. Stirling, M. A. DeWachter, and J. F. Holzman, “Optimization processes for pulsed terahertz systems,” Applied Optics, vol. 54, pp. 535-545, 2015.


[11] M. H. Bergen, J. Nichols, C. M. Collier, X. Jin, B. Raja, D. J. Roberts, P. Ruchhoeft, R. C. Willson, and J. F. Holzman, “A retroreflective imaging system for optical labelling and detection of microorganisms,” Applied Optics, vol. 53, pp. 3647-3655, 2014. (Selected for publication in the Virtual Journal for Biomedical Optics: Novel Light Sources, Optics, and Detectors, vol. 9, 2014)

[10] C. M. Collier and J. F. Holzman, “Ultrafast photoconductivity of crystalline, polycrystalline and nanocomposite ZnSe material systems for terahertz applications,” Applied Physics Letters, vol. 104, 042101(1-5), 2014.


[9] C. M. Collier, K. A. Hill, and J. F. Holzman, “Dielectrophoresis microjet for on-chip technologies,” RSC Advances, vol. 3, pp. 23309-23316, 2013.

[8] C. M. Collier, B. Born, X. Jin, and J. F. Holzman, “Ultrafast charge-carrier and phonon dynamics in GaP,” Applied Physics Letters, vol. 103, 072106(1-4), 2013.

[7] C. M. Collier, B. Born, M. Bethune-Waddell, X. Jin, and J. F. Holzman, “Ultrafast photoexcitation and transient mobility of GaP for photoconductive terahertz emission,” IEEE Journal of Quantum Electronics, vol. 49, pp. 691-696, 2013.

[6] X. Jin, C. M. Collier, J. J. A. Garbowski, B. Born, and J. F. Holzman, “Ultrafast transient responses of optical wireless communication detectors,” Applied Optics, vol. 52, pp. 5042-5049, 2013.


[5] C. M. Collier, B. Born, and J. F. Holzman, “Ultrafast response of SiC and Si nanocomposite material systems,” Electronics Letters, vol. 48, pp. 1618-1619, 2012.

[4] J. Nichols, C. M. Collier, E. L. Landry, M. Wiltshire, B. Born, and J. F. Holzman, “On-chip digital microfluidic architectures for enhanced actuation and sensing,” Journal of Biomedical Optics, vol. 17, 067005(1-7), 2012.

[3] C. M. Collier, X. Jin, and J. F. Holzman, “Ultrafast refractometry for characterization of nanocomposite material systems,” IEEE Photonics Technology Letters, vol. 24, pp. 590-592, 2012.


[2] C. M. Collier, M. Wiltshire, J. Nichols, B. Born, E. L. Landry, and J. F. Holzman, “Nonlinear dual-phase multiplexing in digital microfluidic architectures,” Micromachines, vol. 2, pp. 369-384, 2011.


[1] C. M. Collier, X. Jin, J. F. Holzman, and J. Cheng, “Omni-directional characteristics of composite retroreflectors,” Journal of Optics A: Pure and Applied Optics, vol. 11, 085404(1-10), 2009.