Contact InformationDayan Ban

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


Biography Summary

Dayan Ban is an Associate 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 2014, 2015, 2017, 2018, 2019
  • NE 202 - Nanomaterials and Environmental Impact; Nanotechnology Engineering Practice
    • Taught in 2014
  • NE 445 - Photonic Materials and Devices
    • Taught in 2014, 2015
  • NE 301 - Nanomaterials and Human Risks, Benefits; Nanotechnology Engineering Practice
    • Taught in 2015
  • NE 241 - Electromagnetism
    • Taught in 2014, 2015, 2018
  • NE 302 - Nanotechnology Engineering Practice
    • Taught in 2015
  • NE 242 - Semiconductor Physics and Devices
    • Taught in 2017
  • NE 345 - Photonic Materials and Devices
    • Taught in 2017, 2018
  • NE 459 - Nanotechnology Engineering Research Project
    • Taught in 2018
* Only courses taught in the past 5 years are displayed.

Selected/Recent Publications

  • Mahmud, Alam and Khan, Asif Abdullah and Islam, Shariful and Voss, Peter and Ban, Dayan, Integration of organic/inorganic nanostructured materials in a hybrid nanogenerator enables efficacious energy harvesting via mutual performance enhancement, Nano Energy, 58, 2019, 112 - 120
  • Wen, Boyu and Xu, Chao and Wang, Siyi and Wang, Kaixi and Tam, Man Chun and Wasilewski, Zbig and Ban, Dayan, Dual-lasing channel quantum cascade laser based on scattering-assisted injection design, Optics express, 26(7), 2018, 9194 - 9204
  • Ku, Nai-Jen and Liu, Guocheng and Wang, Chao-Hung and Gupta, Kapil and Liao, Wei-Shun and Ban, Dayan and Liu, Chuan-Pu, Optimal geometrical design of inertial vibration DC piezoelectric nanogenerators based on obliquely aligned InN nanowire arrays, Nanoscale, 9(37), 2017, 14039 - 14046
  • Liu, Guocheng and Mrad, Nezih and Abdel-Rahman, Eihab and Ban, Dayan, Cascade-type hybrid energy cells for driving wireless sensors, Nano Energy, 26, 2016, 641 - 647
  • Dhar, Rudra S and Li, Lu and Ye, Hao and Razavipour, Seyed G and Wang, Xueren and Yang, Rui Q and Ban, Dayan, Nanoscopically resolved dynamic charge-carrier distribution in operating interband cascade lasers, Laser & Photonics Reviews, 9(2), 2015, 224 - 230
  • Razavipour, SG and Dupont, E and Chan, CWI and Xu, C and Wasilewski, ZR and Laframboise, SR and Hu, Q and Ban, D, A high carrier injection terahertz quantum cascade laser based on indirectly pumped scheme, Applied Physics Letters, 104(4), 2014
  • Chen, Jun and Tao, Jianchen and Ban, Dayan and Helander, Michael G and Wang, Zhibin and Qiu, Jacky and Lu, Zhenghong, Hybrid Organic/Inorganic Optical Up-Converter for Pixel-Less Near-Infrared Imaging, Advanced Materials, 24(23), 2012, 3138 - 3142
  • Fathololoumi, S and Dupont, E and Chan, CWI and Wasilewski, ZR and Laframboise, SR and Ban, D and Mátyás, A and Jirauschek, C and Hu, Q and Liu, HC, Terahertz quantum cascade lasers operating up to~ 200 K with optimized oscillator strength and improved injection tunneling, Optics express, 20(4), 2012, 3866 - 3876
  • Chen, Jun and Ban, Dayan and Helander, Michael G and Lu, Zheng-Hong and Poole, Philip, Near-infrared inorganic/organic optical upconverter with an external power efficiency of> 100%, Advanced materials, 22(43), 2010, 4900 - 4904