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Dr. Xiao Guo is a spectroscopist with research interests in terahertz & mid-infrared near-field light-matter interactions in nanomaterials and nanostructures. He has in-depth theoretical and operational knowldge in scanning near-field optical microscopy (SNOM). He contributes to develop quantitative nanoprobe methods for scattering-type scanning near-field optical microscopy (s-SNOM) and to further study nanoscale heterogeneity in semiconductor nanodevices, prototypical quantum devices for superconducting quantum computing, and biological materials.

Since 2022, He has independently performed peer reviews for internationally recognised journals > 20 times including Nature Communications, ACS Photonics, ACS Applied Materials & Interfaces, Optics Letters, Results in Physics, Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, and Review of Scientific Instruments.

Aleksandar D. Rakić leads the Photonics and Microwave Engineering group at The University of Queensland focusing on the development of technologies for sensing and imaging across the electromagnetic spectrum including microwave, terahertz wave and optical systems.

Professor Rakić’s research focuses on the principles of laser feedback interferometry with semiconductor lasers, and on the application of these principles to imaging and sensing. Rakić group pioneered the development of several world’s first laser-feedback interferometric sensors including systems based on monolithic Vertical-Cavity Surface-Emitting Laser arrays (VCSELs), blue-green lasers, terahertz quantum cascade lasers and mid-infrared interband cascade lasers.

His current focus is on the development of sensing and imaging systems exploiting the THz spectrum for applications from security and defence to in vivo biomedical imaging. His other principal contributions relate to the design and characterization of surface-emitting optoelectronic devices (VCSELs and light emitting diodes) and modelling of optical materials.