Stewart Aitchison

Contact via University of Toronto

Key Research Areas
Associated Researchers
Associated Organizations

Recent Research Projects

Guided Light, Tightly Packed: novel concepts, components and applications

2016/17-2019/20 • $1,050,000 • PI,CO
A multi-institutional and international (Canada-German) training program is proposed around advances in controlling the flow of light. Three collaborating Canadian Institutions (UofToronto, INRS, ULaval) are partnering with the German institutes of Friedrich Schiller University Jena (FSU) and...

3D Additive/subtractive laser manufacturing of photonic circuit and sensor micro-systems

2019/20 • $217,320 • PI,CO
Optical glass has been transforming into high-technology devices, as lenses, fibres and film, that reach deeply into our everyday life. Smart-touch phones benefit our daily lives by enabling high-bandwidth communications and efficient access to information or connection to all things (Internet...

Developing biofilm-based microalgal bioreactors for the efficient production of fuels, chemicals and clean water

2014/15-2017/18 • $472,000 • PI,CO
Using microalgae to convert carbon to biomass is one of the most promising technologies for developing renewable fuels. Algae produces more biomass than conventional crops such as corn and sugar beet, can be used to capture carbon and can be used in water treatment processes. Despite these...

Controlling femtosecond laser processing: smart fibers, catheters, and lab-on-fiber concepts

2013/14-2016/17 • $627,275 • PI,CO
The symphony of colourful flashes emitted during intense laser interactions offer a gentle insight into the much more dramatic undulating physics that evolves rapidly as material is transformed through various states of matter, heated to sun-like temperatures, shocked to explosive pressure, and...

Photonic nanowires for optical sensing and signal processing

2011/12-2015/16 • $300,000 • PI
Developments in nanotechnology underpin many areas of science and technology. The ability of accurately structure surfaces, materials and devices on the length scale of 1 - 100 nm opens up new device and system possibilities in the areas of ICT, biomedical sensing and environmental monitoring....

NSERC CREATE Training program in Nanoscience and Nanotechology

2010/11-2014/15 • $1,401,000 • PI,CO
We propose a training program in nanoscience and nanotechnology aimed at undergraduate and graduate students and postdoctoral fellows which emphasizes the integration of electronics and photonics at the nanoscale. The program is designed to provide the trainees with skills suitable for both...

Cross-talk in silicon photonic waveguide junctions

2014/15 • $25,000 • PI
The aim of this Engage proposal is to establish a new research partnership between the University of Torontoand Huawei Canada. This collaboration will focus on an investigation of the sources of cross talk at theintersection of two waveguides. As the density of components in an integrated...

BiopSys: NSERC Strategic Network for Bioplasmonic Systems

2010/11-2013/14 • $3,483,630 • PI,CO
The aim of the NSERC Strategic Network for Bioplasmonic Systems (BiopSys) is to shorten the time needed for diagnosis and improve prognosis for cancers, such as lung cancer and leukemia, by incorporating plasmonics into diagnostic platforms. Plasmonics is an enabling technology based on an...

Intelligent beam control for ultrashort laser manufacturing of photonic and biomedical microsystems

2010/11-2013/14 • $563,066 • PI,CO
The symphony of colours and light flashes generated during laser machining attest to the dramatic undulating physics evolving rapidly as material is transformed through various states of matter, heated to sun-like temperatures, shocked to explosive pressure, and finally ejected at supersonic...

Tunable laser source in the 6-10 um by difference frequency generation in BRW and QPM AIGaAs

2012/13-2013/14 • $214,284 • PI,CO
This project involves a partnership between the University of Toronto and Genia Photonics to develop nonlinear frequency mixing devices to access the mid-infrared spectral range between 6-10 µm using nonlinear optical effects. The proposed devices are based on difference-frequency mixing of...

Femtosecond Laser: Tailoring extreme laser interaction physics for nano-processing

2013/14 • $150,000 • PI,CO
The symphony of colours and light flashes generated during laser machining attest to the dramatic undulating physics evolving rapidly as material is transformed through various states of matter, heated to sun-like temperature, shocked to explosive pressure, and finally ejected at supersonic...

Optical testbed for secure communication links and energy-efficient devices

2013/14 • $150,000 • PI,CO
This proposal supports the acquisition of a tunable laser system covering the full telecommunication band (wavelength spanning from 1260 nm to 1700 nm) and a pair of single photon detectors to form a test-bed for next generation optical communication links, protocols, and devices. The requested...

Microalgal biorefinery:Biofilm photo-reactor and extraction methods

2010/11-2012/13 • $230,000 • PI,CO
Microalgal technologies, used as a method of conversion of (sun)light to liquid fuels, hold several advantages over conventional crops: they can produce up to 100 times more biomass per unit of crop area; the lipid content of this biomass can be up to 70% (dry basis); the doubling time can be in...

GaAs optical receiver for wavelength division multiplexed photonic integrated circuit

2012/13 • $43,800 • PI
Increasing demand for internet-based services has lead to the evolution of data centres into warehouse-scale computers (WSC). One of the major problems faced by such large-scale facilities is the interconnections between servers and other elements in the system. Current solutions based on...

University of Toronto Enhanced Molecular Beam Epitaxy Facility

2011/12 • $150,000 • PI,CO
Molecular Beam Epitaxy (MBE) is one of the state of the art tools used in the fabrication of compound semiconductor nanostructures, and providing the means to realise technological applications in areas such as optoelectronics, telecommunications, quantum optics and quantum computing, sensing,...

Electrical Characterization Facility

2011/12 • $150,000 • PI,CO
The aim of this application is to establish a state-of-the-art electrical characterization facility. The proposed facility will be capable of measuring the primary electrical properties of thin-film, bulk, and nanostructed materials (resistivity, carrier mobility, and carrier concentration) over...

Nanotechnology Connector Event

2011/12 • $1,800 • PI
No summary

Static and dynamic ultrafast optical pulse shaping devices based on integrated waveguide technologies

2010/11 • $170,000 • PI,CO
This three year strategic project is concerned with the development of a series of new integrated waveguide devices for ultrafast all-optical signal processing applications. The proposed theoretical and experimental research will allow university teams from University of Toronto and INRS-EMT, in...

Periodic structures for nonlinear optics

2010/11 • $47,600 • PI
No summary

High-capacity transport, wavelenght division multiplexing photonic integrated circuits in gallium arsenide

2010/11 • $25,000 • PI
This Engage application aims to establish a new collaboration between OneChip Photonics and Professor Aitchison's research group at the University of Toronto. The project will investigate a new approach to the optoelectronic integration of wavelength division multiplexing components, which align...

Large area gratings on thin silicon nitride membranes using electron beam lithography

2010/11 • $24,475 • PI
The proposed industrial collaboration between the applicant and Applied Nanotools (ANT) is aimed at developing a process for the patterning of large areas of submicron gratings on a silicon nitride (Si3N4) membrane which is only 100 nanometres thick. The key tool for such a process is an...



Apparatuses and methods for spectroscopy using multiple resonance modes are provided. Multiple resonance modes may be used for bulk sensing and/or surface sensing applications. A plasmon waveguide resonance sensor is provided for multimode spectroscopy. The sensor includes a dielectric layer; and a metallic layer coupled to the dielectric layer. The sensor is configured to provide: a first resonance mode for bulk sensing, in response to light of a given wavelength; and a second resonance...
Related applications: WO2015CA00300