Prof. Kishen’s research interests include dentin/interfacial-mechanics, dentin-microbial interactions, biomaterial centered infection, rapid diagnostic sensors, photodynamic antimicrobial therapy, nano-particles/fibrils: Development, characterization, and cell/bacteria interaction, and endodontic environment, disinfection, irrigation, and restorative considerations.
For more information, visit Prof. Dhirani’s web site.
The primary areas of research in the Ultrafast Photonics Laboratory focus on:
The Ultrafast Photonics Laboratory and the Organic and Polymer Optoelectronics Laboratory are equipped to perform various types of ultrafast optical measurements for studying dynamical processes as well as nonlinearities in semiconductors, organic polymer materials and pulse propagation in fiber grating structures. We also have basic material processing capabilities including a fume hood and wet chemical bench.
Expertise in Nanofabrication, Nanoelectronic Structures and Devices, Nanophotonics (one of 5 cofounders of NCE in Photonics), NEOMS/MEMS, and in Modeling and Simulation of Nanostructures (including Transport and Optical Properties)
Currently working on quantum functional devices, resonant tunneling heterostructures, low dimensional systems (including quantum wells, wires and dots), single electronics, photonic crystals/nanostructures, quantum information based on nanostructures, nanoferroelectric systems, passivation of nanostructures, preparation using molecular beam epitaxy, novel fabrication approaches to nanostructures including SPM based techniques, eBeam lithographic templating and self assembly, modeling of transport and optical processing in nanostructures, modeling of stochastic and complex systems based on nanostructures including quantum dot formation, quantum cellular automata, and heavily driven chaotic optical systems, developing micro electro optical mechanical systems using quantum functional nanostructures for sensing, actuation in electronic and photonic systems, developing novel nanoscale probe techniques for nanostructures, including ultrafast optical, scanning probe, and electro-optic techniques.
Extensive facilities for Epitaxial Growth, Processing, Characterization, and Computing. For the detail list of the equipments, please visit our facilities Web Site at http://www.utoronto.ca/~emg/research.facilities.html
Emerging Fibre-Optics Technology
In the past few years, our group’s research has been focused on fibre-based photonic technologies and applications. In particular, our group have explored applications of fibre-optic technologies in the emerging field of quantum communication where our research is making vital contributions to bringing quantum technology from scientific possibility to commercial viability.
At the same time, we have made a significant impact in the traditional field of optical metrology, where our technological innovations in fibre-based interferometers have created new and better methods for dispersion measurements and optical sensing. In addition, we have also made contributions to the areas of fiber amplifiers and ultrafast nonlinear photonics.
The highlights of our research include the first demonstration of experimental decoy-state quantum key distribution system, the first experimental verification of group velocity dispersion inversion in III-V semiconductor nanowires, and the invention of the frequency-shifted interferometry, a technology that has many applications in optical sensing and metrology.
Microring Resonator Modulators, Noise and Dynamics of Microcavity Lasers
Our research centers on novel optoelectronic devices for high-performance communication systems. We have a strong interest in active devices (i.e. those that can modulate or amplify light controllable by an external signal). The research is at the interface of physics and engineering. The exploration of the fundamental physics and the search for practical applications are complementary and critical for innovations. Investigations into the device physics drive new applications. At the same time, with advances in fabrication technologies, material growth and synthesis, it has become easier and more important to understand the quantum fluctuations of and interactions between electrons and photons.
Our devices are fabricated at the ECTI cleanroom facilities on campus (inside the Pratt, Bahen, and Wallberg buildings). The facility supports photolithography, electron-beam lithography, wet and dry etching, as well as metal and dielectric deposition.
quantum information, particularly quantum cryptography
Hoi-Kwong Lo’s research interest is quantum information, particularly quantum cryptography. He was among the first to demonstrate the impossibility of a whole class of quantum cryptographic protocols including quantum bit commitment, thus correcting an erroneous long-held belief in the field. He and H. F. Chau provided a proof of security of quantum key distribution, thus solving a long-standing problem. Both results have been widely cited and also reported in the scientific press.
Besides the foundations of security, his current research focus includes the security of quantum cryptography with imperfect devices. He has a quantum cryptography lab for the study of implementation issues and systems building.
Integrated Bio-sensors and Bio-imaging System
Our research interests include developing biomedical imaging systems and optical bio-sensors based on semiconductor devices and nano-structures, and their application to bio-medical diagnostics, in vivo imaging, and study of bio-molecular interactions. The goal of our work is to integrate sensor components into miniature functional bio-sensors and apply them to novel biology and bio-medical applications. As such, our research is interdisciplinary and include semiconductor device physics, optics, micro- and nano-fabrication, chemistry and applications in biomedical diagnostics, cancer studies and neurobiology.
Our research group is currently focusing attention on several problems in theoretical chemical physics. Amongst these are: