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A simplified model to estimate thermal resistance between carbon nanotube and sample in scanning thermal microscopy (2017)
Journal Article
Nazarenko, M., Rosamond, M. C., Gallant, A. J., Kolosov, O. V., Dubrovskii, V. G., & Zeze, D. A. (2017). A simplified model to estimate thermal resistance between carbon nanotube and sample in scanning thermal microscopy. Journal of Physics D: Applied Physics, 50(49), Article 494004. https://doi.org/10.1088/1361-6463/aa900e

Scanning thermal microscopy (SThM) is an attractive technique for nanoscale thermal measurements. Multiwalled carbon nanotubes (MWCNT) can be used to enhance a SThM probe in order to drastically increase spatial resolution while keeping required ther... Read More about A simplified model to estimate thermal resistance between carbon nanotube and sample in scanning thermal microscopy.

Field imaging near to the surface of terahertz reflective optics using a vector network analyzer (2017)
Journal Article
Hajji, M., Hammler, J., Zeze, D., Balocco, C., & Gallant, A. J. (2017). Field imaging near to the surface of terahertz reflective optics using a vector network analyzer. Applied Optics, 56(31), 8746-8750. https://doi.org/10.1364/ao.56.008746

A vector network analyzer-based quasi-optical measurement system that is suitable for mapping electric field intensity and phase near to the surface of terahertz reflective optics is presented. The system uses a fixed five parabolic mirror and transm... Read More about Field imaging near to the surface of terahertz reflective optics using a vector network analyzer.

Low-loss, Low-cost, High Refractive Index Machinable Ceramic For THz Optical Components (2017)
Presentation / Conference Contribution
Klein, A., Hammler, J., Zeze, D., Balocco, C., & Gallant, A. J. (2017, August). Low-loss, Low-cost, High Refractive Index Machinable Ceramic For THz Optical Components. Presented at 42nd International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2017), Cancun, Mexico

The properties of a machinable, high refractive index, low-loss, low-cost material are investigated. Both a THz-TDS and a Vector Network Analyzer (0.75-1.1 THz) are used to characterize the material and precisely obtain the absorption coefficient. Fr... Read More about Low-loss, Low-cost, High Refractive Index Machinable Ceramic For THz Optical Components.

Model for large-area monolayer coverage of polystyrene nanospheres by spin coating (2017)
Journal Article
Chandramohan, A., Sibirev, N., Dubrovskii, V., Petty, M., Gallant, A., & Zeze, D. (2017). Model for large-area monolayer coverage of polystyrene nanospheres by spin coating. Scientific Reports, 7, Article 40888. https://doi.org/10.1038/srep40888

Nanosphere lithography, an inexpensive and high throughput technique capable of producing nanostructure (below 100 nm feature size) arrays, relies on the formation of a monolayer of self-assembled nanospheres, followed by custom-etching to produce na... Read More about Model for large-area monolayer coverage of polystyrene nanospheres by spin coating.

Photonic-Crystal Based Enhancement Of Terahertz Spectroscopy In Microfluidic Cells (2016)
Presentation / Conference Contribution
Klein, A. K., Hammler, J. M., Zeze, D., Balocco, C., & Gallant, A. J. (2016, December). Photonic-Crystal Based Enhancement Of Terahertz Spectroscopy In Microfluidic Cells. Presented at 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Copenhagen, Denmark

Free-Space Permittivity Measurement at Terahertz Frequencies with a Vector Network Analyser (2016)
Journal Article
Hammler, J., Gallant, A. J., & Balocco, C. (2016). Free-Space Permittivity Measurement at Terahertz Frequencies with a Vector Network Analyser. IEEE Transactions on Terahertz Science & Technology, 6(6), 817-823. https://doi.org/10.1109/tthz.2016.2609204

A simple system, based on a vector network analyzer, has been used with new numerical de-embedding and parameter inversion techniques to determine the relative permittivity (dielectric properties) of materials within the frequency range 750–1100 GHz.... Read More about Free-Space Permittivity Measurement at Terahertz Frequencies with a Vector Network Analyser.

Polymer-based micro-golay cells for THz detection (2016)
Presentation / Conference Contribution
Stefanova, P. S., Hammler, J. M., Klein, A. K., Gallant, A. J., & Balocco, C. (2016, December). Polymer-based micro-golay cells for THz detection. Presented at 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Copenhagen, Denmark

Polymer-Based Micro-Golay Cells For THz Detection (2016)
Presentation / Conference Contribution
Stefanova, P., Hammler, J., Klein, A., Gallant, A., & Balocco, C. (2016, December). Polymer-Based Micro-Golay Cells For THz Detection. Presented at 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Copenhagen, Denmark

We report on the design, simulation and fabrication of polymer-composite micro-Golay cells for THz and far-infrared detection. Preliminary experimental results showed that the cell’s mechanical, thermal and optical properties make it an excellent can... Read More about Polymer-Based Micro-Golay Cells For THz Detection.

Capacitive pressure sensor with GaAs nanowire - PMMA dielectric layer (2016)
Presentation / Conference Contribution
Chandramohan, A., Cirlin, G., Mendis, B., Petty, M., Gallant, A., & Zeze, D. (2016, December). Capacitive pressure sensor with GaAs nanowire - PMMA dielectric layer. Presented at Nanostructures for Photonics (NSP), St. Petersburg, Russia

Microfabrication of SU-8 Fresnel lenses for THz imaging (2016)
Presentation / Conference Contribution
Hajji, M., Pan, Y., Hammler, J., Zeze, D., Balocco, C., & Gallant, A. (2016, December). Microfabrication of SU-8 Fresnel lenses for THz imaging. Presented at Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX, San Francisco, California, United States

Anharmonic Bloch Oscillation of Electrons in Biased Superlattices (2015)
Journal Article
Ivanov, K., Petrov, A., Kaliteevski, M., & Gallant, A. (2015). Anharmonic Bloch Oscillation of Electrons in Biased Superlattices. JETP Letters, 102(12), 796-802. https://doi.org/10.1134/s0021364015240054

The oscillatory motion of electrons in a periodic potential under a constant applied electric field, known as Bloch oscillations (BO), is one of the most striking and intriguing quantum effects and was predicted more than eighty years ago. Oscillatin... Read More about Anharmonic Bloch Oscillation of Electrons in Biased Superlattices.

Free-space material characterisation at terahertz frequencies using a vector network analyser (2015)
Presentation / Conference Contribution
Hammler, J., Gallant, A., & Balocco, C. (2015, December). Free-space material characterisation at terahertz frequencies using a vector network analyser. Presented at URSI AT-RASC 2015, Gran Canaria, Spain

While dielectric properties of many materials have been extensively characterised at low frequencies and into the microwave region of the electromagnetic spectrum, published information is much sparser in the THz region. Knowledge of permittivity is... Read More about Free-space material characterisation at terahertz frequencies using a vector network analyser.

Effect of Wood’s Anomalies on the THz Transmission Spectra of Free- Standing Metallic Hole Arrays (2015)
Presentation / Conference Contribution
Hill, C., Klein, A., Balocco, C., Wood, D., & Gallant, A. (2015, December). Effect of Wood’s Anomalies on the THz Transmission Spectra of Free- Standing Metallic Hole Arrays. Presented at 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Hong Kong, China

A free-standing periodic array of subwavelength rectangular apertures has been designed to exhibit peak transmission which is dominated by localized aperture resonance in the THz region. By varying the incident angle, Wood's anomalies can be introduc... Read More about Effect of Wood’s Anomalies on the THz Transmission Spectra of Free- Standing Metallic Hole Arrays.

Large-scale fabrication of stamps bearing size-tuneable nanostructures (2015)
Presentation / Conference Contribution
Chandramohan, A., Sibirev, N., Kaliteevskaya, N., Dubrovskii, V., Mendis, B., Petty, M., Gallant, A., & Zeze, A. (2015, December). Large-scale fabrication of stamps bearing size-tuneable nanostructures. Presented at International Meeting on Materials for Electronic Applications, Marrakech, Morocco

Generation of terahertz radiation by AlGaAs nanowires (2015)
Journal Article
Trukhin, V., Buyskih, A., Bouravlev, A., Mustafa, I., Samsonenko, Y. B., Trukhin, A., …Gallant, A. (2015). Generation of terahertz radiation by AlGaAs nanowires. JETP Letters, 102(5), 316-320. https://doi.org/10.1134/s0021364015170129

Terahertz emission by AlGaAs nanowires grown on a GaAs substrate under excitation by femtosecond optical pulses has been observed. It is demonstrated that THz emission occurs via excitation of photocurrent in the nanowires. The dynamics of photoinduc... Read More about Generation of terahertz radiation by AlGaAs nanowires.

Simple de-embedding and simulation technique to find permittivity with a THz vector network analyser (2015)
Presentation / Conference Contribution
Hammler, J., Gallant, A., & Balocco, C. (2015, August). Simple de-embedding and simulation technique to find permittivity with a THz vector network analyser. Presented at 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Hong Kong, China

A simple and fast method for measuring the dielectric constant with a THz vector network analyser (VNA) has been developed. A numeric de-embedding technique removes free-space propagation effects, then simulation of Maxwell's equations simultaneously... Read More about Simple de-embedding and simulation technique to find permittivity with a THz vector network analyser.

3D polymer structures with variable permittivity at terahertz frequencies (2015)
Presentation / Conference Contribution
Hammler, J., Pan, Y., Gallant, A., & Balocco, C. (2015, August). 3D polymer structures with variable permittivity at terahertz frequencies. Presented at 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Hong Kong, China

Titanium dioxide (TiO2) powder has been blended with polydimethylsiloxane (PDMS) to manufacture a composite polymer with variable permittivity. Vector network analyser measurements taken between 0.75-1.1 THz quantify the relationship between TiO2 con... Read More about 3D polymer structures with variable permittivity at terahertz frequencies.