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Research Areas

Implantable Electrode, for collecting brain neural signals. Karen Cheung.

Circuits of the Future? Crossed single-walled carbon nanotubes. Dr. Alireza Nojeh.

Micromotors and Sensors: Mechanical parts are etched in silicon. Dr. Edmond Cretu.

Research in our group is in areas:


Research projects:


Optical Antennas

In nanoscale optical devices, both the particle and the wave nature of light can play important roles. This creates new opportunities for engineering the optoelectronic properties, for instance the amount of light absorption in a device.

Modeling and Simulation

We use techniques ranging from classical, continuum modeling, to molecular dynamics, to quantum mechanical simulations using the density functional theory and first-principles techniques such as the Hartree-Fock method. We investigate the mechanical properties, electronic structure, transport characteristics and optical properties of nanodevices.

Microfluidic electrochemical sensors for early detection of prostate cancer

By integrating multiple molecular biology assay steps on a single microfluidic platform, we aim to detect the activity of telomerase, an enzyme upregulated in prostate cancer cells. This will hopefully provide detection of prostate cancer than currently possible, and demonstrate better specificity for cancer than prostate-specific antigen (PSA) tests.

Micromirror array for adaptive optics

The objective of this project is to build an adaptive micro-optical systems using a 2D micromirror array adaptively controlled through digital signal processing algorithms implemented in reconfigurable hardware (FPGA)

Controlled Nanofabrication

A significant challenge in research on nanostructures is the lack of sufficient control over the fabrication processes. Therefore, an important aspect of our research is the study of nanostructure fabrication processes with the goal of achieving higher levels of control and reproducibility.

Ultrasound imaging using CMUT

CMUT arrays promise a new generation of ultrasound imaging systems, with applications in 3D and 4D (real-time 3D) non-invasive imaging or high-frequency imaging (ultrasound biomicroscopy). The project targets the development of a portable CMUT-based ultrasound imaging system, to be used for breast cancer detection and monitoring.

Inkjet patterning of mammalian cells

Inkjet patterning of mammalian cells

Angular rate sensors for Automobile and Biological projects

Gyroscopes are used to sense angular rate and when used along with accelerometers can be used as effective navigation sensors. Due to their tiny size(1cmx1cm)die and high sensitivity they could be used in minimally invasive surgery.
Modal Analysis

Batch-Mode Micro-Electro-Discharge Machining

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Silicon On Insulator (SOI) based nanophotonics

Silicon waveguides using SOI substrate allow for the fabrication of extremely compact photonic circuits based on standard CMOS processing. The goal of this project is to simulate, design and characterize several highly attractive optical functions based on SOI waveguiding.

Magnetically Driven Micro Confocal Imaging System

The objective of this project is to design and construct a confocal imaging engine using MOEMS technology and to couple this with Raman Spectroscopy system in order to form a handheld device with dual complementary capabilities: cellular-level resolved confocal skin imaging combined with accurate and precise Raman spectroscopy of specific subsurface skin microstructures in vivo.

MEMS microscanning lens

A magnetically actuated MEMS scanner with a microfabricated ferromagnetic nickel platform and thermosetting polydimethylsiloxane (PDMS) microlens is demonstrated. The device is driven by an external AC magnetic field, eliminating chip circuitry and thermal deformation from joule heating. The resonant frequency of 215.2 Hz and scanning angle of 23 of the scanner have been demonstrated.

Reversible cell trapping in microfluidic channels using hydrogels

Reversible cell trapping in microfluidic channels using hydrogels

Thermal Modulation of Microchannel Widths

We develop methods for thermal modulation of the widths of microchannels during operation of microfluidic devices. This allows arbitrary modulation of the channel width after device fabrication so that flow rate and flow velocity can be set independently.

Microflow control technology

We are developing technology for microflow control that is suitable for portable low-cost instruments. Building blocks are fully integratable devices including microvalves, micropumps and micromixers. Concerns are low power consumption, fast response time and low cost.

Detection and characterization of pathogenic bacteria

Electrokinetic methods for isolation, concentration, and purification of pathogenic bacteria from complex media. Fabrication of integrated microfluidics for front-end purification followed by genetic and immunological characterization.
DEP setup

Advanced Fabrication Techniques For Micro/Nano Structures

We develop methods to enhance current microfabrication technologies. Focus of this work is on material functionality and user friendliness.
Advanced Fabrication

Organic Transistors

Application of printing methods in producing organic transistors has promised low-cost electronics, but a printed transistor has a poor performance due to the thick semiconductor layer. Also, most of organic transistors operate at high voltages (> 40V). We are investigating two types of organic transistors, OMESFET and dual gate transistor, to overcome the voltage problem and enhance the performance in a thick film transistor.

Micro-endoscopes for in vivo tissue imaging

This project aims to develop micro-endoscopes for in vivo intra-luminal tissue imaging. The design will use current techniques such as photonic crystal fibers, micro-optics, and MEMS scanners. The micro-endoscopes will enable high resolution, multimodality imaging of subsurface structures and compositions of internal organs.

High-Speed Transistor Microring Lasers

Mirco-ring lasers (MRLs) are compact semiconductor lasers, where the output light is coupled directly into a planar waveguide, making them suitable for monolithic integration with other optical components, and promising for optical communications and optical interconnects. We are integrating a heterojunction bipolar transistor (HBT) structure into the MRL, and designing for very high frequency modulation modulation (>40 GHz).
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