Dayan Ban

Professor and Associate Director, Nanotechnology Engineering
Dayan Ban

Contact information

Phone: 519-888-4567 x37467
Location: QNC 4603


Dayan Ban

Biography summary

Dayan Ban is a full Professor in Electrical and Computer Engineering and is a researcher at the Waterloo Institute for Nanotechnology.

His expertise lies in the conversion of near infra-red light directly to visible light, design and fabrication of high-performance quantum devices and the development of ultra-sensitive surface plasmon sensors.

Professor Ban successfully improved the efficiency of hybrid organic/inorganic devices by more than one order of magnitude and applied time-domain terahertz spectroscopy to study the device physics of terahertz quantum cascade lasers. Professor Ban’s research has also accomplished the fabrication of prototype hybrid organic/inorganic devices by direct tandem integration and the study of the effects of interfacial states on device performance. These devices are responsible for the conversion of near-infrared light directly to visible light (green) at room temperature.

Professor Ban pioneered the development of new methods in scanning probe microscopy to observe, with nanometric spatial resolution, two-dimensional profiles of conductivity and potential inside actively-driven lasers. He also resolved the nanoscopic reason for anomalously high series resistance encountered in ridge waveguide lasers. In addition, Professor Ban reported the first direct experimental observation of electron overbarrier leakage in operating buried heterostructure multi-quantum-well –lasers. His work has provided the first experimental visualization of the inner workings of operating semiconductor lasers, and has also provided a platform for enabling tools for quantum semiconductor device and nanotechnology research.

Research interests

  • Semiconductor quantum devices
  • Photonics
  • THz technology
  • Nanotechnology
  • Atomic force microscope
  • Fiber-optical communication system
  • Silicon Devices
  • Terahertz Quantum Cascade Lasers
  • Biophotonics
  • Scanning Probe Microscopy
  • Connectivity and Internet of Things
  • Nanofabrication
  • IoT
  • Devices
  • Application domains


  • 2003, Doctorate, PhD, University of Toronto
  • 1995, Master's, MS, University of Science and Technology of China
  • 1993, Bachelor's, BA, University of Science and Technology of China


  • ECE 672 - Optoelectronic Devices
    • Taught in 2019, 2020, 2021, 2022
  • NE 241 - Electromagnetism
    • Taught in 2019, 2020, 2021
  • NE 345 - Photonic Materials and Devices
    • Taught in 2019, 2020, 2021, 2022

* Only courses taught in the past 5 years are displayed.

Selected/recent publications

  • Khan, Asif Abdullah and Huang, Guangguang and Rana, Md Masud and Mei, Nanqin and Biondi, Margherita and Rassel, Shazzad and Tanguy, Nicolas and Sun, Bin and Leonenko, Zoya and Yan, Ning and others, Superior transverse piezoelectricity in organic-inorganic hybrid perovskite nanorods for mechanical energy harvesting, Nano Energy, 86, 2021
  • Sun, Bin and Johnston, Andrew and Xu, Chao and Wei, Mingyang and Huang, Ziru and Jiang, Zhang and Zhou, Hua and Gao, Yajun and Dong, Yitong and Ouellette, Olivier and others, Monolayer perovskite bridges enable strong quantum dot coupling for efficient solar cells, Joule, 4(7), 2020, 1542 - 1556
  • Huang, Guangguang and Khan, Asif Abdullah and Rana, Md Masud and Xu, Chao and Xu, Shuhong and Saritas, Resul and Zhang, Steven and Abdel-Rahmand, Eihab and Turban, Pascal and Ababou-Girard, Soraya and others, Achieving Ultrahigh Piezoelectricity in Organic--Inorganic Vacancy-Ordered Halide Double Perovskites for Mechanical Energy Harvesting, ACS Energy Letters, 6(1), 2020, 16 - 23
  • Chao Xu, Shazzad Rassel, Steven Zhang, Abdulrahman Aloraynan, Dayan Ban., SWIR water muting photoacoustic system for detecting physiological concentrations of endogenous molecules, Biomedical Optics Express, 12(1), 2020, 666 - 675
  • Zhang, Mingyu and Ban, Dayan and Xu, Chao and Yeow, John TW, Large-Area and Broadband Thermoelectric Infrared Detection in a Carbon Nanotube Black-Body Absorber, ACS nano, 13(11), 2019, 13285 - 13292

In the news

Graduate studies