NSERC Undergraduate Student Research Awards (USRA) at Carleton University, Summer 2014
Dr. Ye is currently looking for motivating USRA students to work on nano-sized optical biosensor and silicon-based thin film solar cells. The research involves innovative design of an optical biosensor, which can be used to detect bacteria or single DNA strands. In addition, multiple designs of silicon-based thin-film solar cells will be conducted. Built on our existing simulation results, advanced simulations of both electronic and photonic devices will be performed. Interested students will be involved in micro-fabrication of these devices at Carleton University's MicroFabrication Facility (CUMFF).
Students who are Canadian citizens or permanent residents, are currently in their 3rd or 4th years of an honours physics or engineering program (with strong electromagnetics/optics/photonics background), and who have a cumulative average of at least B+ are eligible to apply. Applicants should complete Form 202 online. The deadline for application is February 20, 2014. Details of the eligibility and application procedure can be found here.
A complete application consists of: NSERC Form 202, an up-to-date official transcript, a resume, and a cover letter. For further information, please contact me by email.
FOURTH YEAR PROJECT: Details can be found HERE.
SUBWAVELENGTH GRATINGS (SWGs)
OPTICAL SWITCHING ON SOI
LOW LOSS SILICON WAVEGUIDES
This research project involves fabrication of low loss amorphous silicon for waveguide-based devices. Interested students will gain valuable experience in fabrication processing for semiconductor devices. The on-going research has focused on the fabrication of straight and bent photonic wires using the LOCal Oxidation of Silicon (LOCOS) process. Project collaborators include Professor Garry Tarr and Harvard University's Center for Nanoscale Systems (CNS)
NANO-SIZED OPTOELECTRONIC BIOSENSORS
The search for novel vaccines or drug candidates almost always begins with screening mixtures of organic compounds for specific biological activity. Nano-sized optical sensor technology is required for low cost, highly effective detection of the presence of tiny amounts of particular complex organic chemicals. Although there has been much progress on biochemical sensing systems with photonic devices, the existing systems are far from practical in terms of reliability, performance and cost. The research involves innovative design of opto-electronic biosensors. Device configurations include vertically-coupled double-ring resonators (DRRs) and subwavelength grating structures (SWGs). Simulations of both electronic and photonic devices will be performed. Students will also fabricate these devices. The final step will involve device characterization. Project collaborators are Harvard University's Center for Nanoscale Systems (CNS) for optical mask preparation, and National Research Council Canada (NRC) for the SWG structures.
PLASMONIC-ENHANCED SILICON-BASED SOLAR CELLS
Photovoltaics (PV) directly converts sunlight to electricity using semiconductor devices, providing one of the most promising prospects for clean energy for the future. This research project will involve the design of a high efficiency silicon based solar cells. Students will be responsible in designing an innovative approach for efficient light trapping. Successful design will be fabricated and tested. A strong background in semiconductor physics is required.
The purpose of this research is to build a device to non-invasively measure blood glucose levels. Infrared light will be used to determine blood glucose levels through the skin, using the unique optical response of blood or other bodily fluids: tears, saliva, or urine. The optical properties of blood glucose, or glucose in tears, saliva or urine will be researched in the beginning of the study to determine the best method to measure glucose levels in the body. From the preliminary literature, it has been found that optical properties of skin depend on structural properties and chemical composition of the skin, which varies with time and location on the body. The increase of glucose concentrations decreases the scattering coefficient in tissues. Two techniques have been presented in the literature: optical coherence tomography (OCT) and near-infrared spectroscopy (NIR). If blood glucose is to be measured through the skin, another aspect to look for is the location of the non-invasive measurement. During the research period, each technique will be evaluated in terms of its accuracy value and cost to build. The best technique will be used to build a biophotonics device that will measure blood glucose levels through various bodily fluids, including blood (through the skin), tears, saliva and urine. The device will be tested against glucose meters that have been FDA approved, both non-invasive and invasive (using blood drawn from a finger prick).
Please check out the presentations my undergraduate students prepared during Summer 2010 (Well done everyone!):
Rohit Zijoo & Aditya Purohit
In Summer 2011, my USRA students (Martin Friedl, Jeremy Miller and Michael Sawires) have fabricated and test amorphous Silicon based solar cells, including both the Schottky diode design and the PIN configuration. Here is a copy of their powerpoint presentation.
RELIABLE OPTO-ELECTRONIC DEVICES:
Continuously increasing CMOS integration density is enabling greater functional complexity and speed than ever before. Now, as silicon electronics begins to merge with photonics and advanced material technologies, innovative systems-on-chip (SOCs) are being explored for fascinating new biomedical and environmental applications. However, the high-speed electronics on the CMOS chips run at very high and non-uniform temperatures, compromising reliability. This research project seeks solutions to the thermal reliability/operational limits of modern opto-electronic ICs.
The theoretical and experimental work of similar device was done at MIT (see W. N. Ye et al., IEEE Photon. Technol. Lett., 20 (11), pp. 882-884, 2008; V. Raghunathan et al., Opt. Exp., 18 (17), pp.17631-17639, 2010.). Professor L. C. Kimerling from MIT is interested in continuing our collaboration on this project. Qualified students will be working with me and possibly with Professor Kimerling.
BIOPHOTONIC SYSTEM FOR PHOTODYNAMIC TREATMENT OF BIOFILM INFECTIONS:
Over half of the hospital-acquired infections are ?biofilm infections?, which are associated with implants. A biofilm is frequently developed to surround an implanted device and act as a protective shield from host immune defenses and antibiotic medications. As a result, the biofilm is likely to lead to chronic and life threatening infections. The fatality from these infections ranges from 5% to 60%. It is necessary to develop an effective solution for solving the problem of biofilms such that implanted medical device-associated infections can be effectively prevented or are at least treatable in an efficient and acceptable manner without surgery.
This project is to design, fabricate and test an integrated biophotonic system for photodynamic treatment of implanted device associated biofilm infections. The efficacy of the device will be tested in clinical trials, conducted by the physicians and scientists at the Ottawa Heart Institute. The main collaborator of the project is Dr. Tofy Mussivand from the Ottawa Heart Institute.