Areas of Research
The Group activities can be divided into the following research directions:
Portable, low-cost, reliable and highly-efficient CW and ultrashort pulse Near-IR (1µm-1.3µm) laser sources based on quantum-dot semiconductor structures. Part of this work was funded by FAST-DOT, €14.7M European project involving 18 partners
Research in novel, compact femtosecond lasers and their application to two- photon, second harmonic and third harmonic imaging in fixed and live tissue samples.
Compact, low-cost, reliable and highly-efficient CW and ultrashort pulse Near-IR (1µm-1.3µm) Vertical-External-Cavity Surface-Emitting Lasers based on quantum-dot and quantum-well semiconductor structures. Part of this work was funded by FAST-DOT, €14.7M European project involving 18 partners
High-power SESAM-free mode-locked QD- and QW-VECSELs.
Broadly tunable room-temperature
Compact, efficient, broadly tunable visible laser sources (500 nm — 650 nm). Part of this work was funded by the FAST-DOT, €14.7M European project involving 18 partners
Research in broadly tunable continuous wave and picosecond lasers and their application in Confocal Laser Scanning Microscopy (CLSM) and Fluorescence Lifetime Imaging Microscopy (FLIM) with a focus on quantitative imaging in biological samples.
Generation of UV-visible and IR/mid-IR radiation using novel quasi-phase-matched nonlinear waveguided crystals based on different semiconductors. This work was funded by EPSRC
The development of ultra-compact, room temperature sources of coherent THz radiation. This work is based primarily on the optimisation of devices and structures based on quantum-dot semiconductor materials, as well as traditional materials such as low-temperature-grown GaAs and InGaAs. This work was funded by EPSRC
The fabrication of low-cost, compact, room-temperature terahertz sources emitting few tens of µW powers at
Optical schemes for stable single and dual-wavelength operations of laser diodes, using volume Bragg gratings and fibre Bragg gratings. Dual-wavelength operation is particularly desirable for terahertz difference signal generation and for super-resolution microscopy.
Generation of two optical modes in the IR and visible spectral region with a tuneable difference frequency between 0.3THz and 33 THz.
Development of novel techniques for shaping the laser beams (Conical Refraction, Bessel Beams, etc.) producing unique optical properties for micro-machining, materials processing and life sciences applications.
Conical Refraction investigation was funded by €1.7M HiCore Project
Work on Bessel Beams was funded by People Marie Curie Action project SeNDBeams
The development of high efficiency and high brightness monolithic and hybrid all-semiconductor WHITE light-emitting GaN-based diodes with the aim to replace conventional light sources with superior highly efficient white LEDs. This work is funded by €11.8M FP7 IP program called NEWLED.
Amongst our research interests is the therapeutic potential of novel and compact near-infrared diode lasers in the context of photo-medicine, particularly in new forms of photodynamic therapy (collaboration with the Scottish Photodynamic Therapy Centre at Ninewells Hospital (Dundee), in this research direction.
Multi-functional non-invasive laser diagnostics systems for the optical analysis of blood and biological tissues using several non-invasive diagnostic methods, including Laser-Doppler Flowmetry, Tissues Reflectance Oximetry, Laser Fluorescence Diagnostics, and pulse oximetry method. The main application areas in medical practice are Angiology and Physiology, Transplantation, Gastroenterology, Oncology and Radiology. This research was funded by €1.7M FP7 IAPP project called MEDILASE, and is partially funded by FP7 IDP project called PHOQUS (value €3.8M).
Advanced diagnosis and treatment of bladder cancer. The project is based on results which show that cancerous cells may be identified under infrared light analysis, and infrared lasers developed here may be implemented as part of the project. This research is funded by €2.4M FP7 IAPP project called ABLADE.