The focus for our Photonics and Microelectronics research is three-fold:
- Develop ultraviolet and visible high power solid-state light-emitting diodes and lasers using AlInGaN multiple quantum wells.
- Develop AlInGaN based high-power, high frequency microwave transistors using innovative material designs and processing techniques.
- Develop AlInGaN based photodetectors
Our research approach is to use the quaternary AlInGaN material system. Our group has pioneered this material system as can be seen from our recent publications describing the research results. Innovative material and device structures have been demonstrated using the Strain Energy Band Engineering (SEBE) approach that the quaternary AlInGaN material allows.
The objective of our light emitting diode (LEDs) and laser diodes (LDs) research is to develop high power ultraviolet (UV) and visible (purple, blue, green) LEDs and lasers using the quaternary AlInGaN multiple quantum wells.
- Currently we are the world leaders in the development of high power, high efficiency deep UVLEDs with wavelengths ranging from 240nm to 340nm. These high power deep UVLEDs are ideally suited for chemical/mineral identification, sterilization system for water and air purification, UV curing systems, UV coating/printing assemblies for polymers, phototheraphy devices, security products, leak detector, food checking, high security UV marks etc.
- Solid-state white light is the future for indoor and outdoor lighting as it results in significant energy savings. Pumping of phosphors with visible (purple, blue, green) LEDs will help generate white light emission.
Our aim in the microwave electronic devices is not only to achieve record performance levels but also to study the material device interactions. This allows us to propose and demonstrate unique solutions to key problems such as gate leakage, current collapse, and device reproductivity and lifetime that limit their use in systems.
- High voltage devices
- High power, high frequency transistors
- Power electronic devices including switches, converters etc.
Photodetectors are another important focus our research group.
- Avalance Photodiode
- Solar blind detector
