III-V compound semiconductor nanowire THz detectors
Department of Physics, University of Oxford
The terahertz (THz) band occupies the transition region on the electromagnetic spectrum between microwaves and infrared, spanning from 100 GHz to 30 THz, thus enabling a broad range of applications from high-speed wireless communications to spectroscopy and imaging. The THz communications are considered as a key technology for future 6G wireless communications. While the THz image scanners are anticipated to be ideal alternative to the X-ray scanners for future medical examination and airport security screening beneficial from their ionization-free nature and transparency to non-conducting materials. However, the lack of conventional materials and approaches for efficient THz generation and detection, makes it difficult to build low-cost, compact, and efficient THz instrumentation, which hinders their widespread use. The THz optoelectronics based on III-V semiconductor nanowires have been recently demonstrated as promising nano-components for high-performance compact THz systems with sub-wavelength spatial resolution, broadband spectral sensitivity, and polarization sensitivity. This talk is to present my research results on the development of III-V semiconductor nanowires for THz applications, particularly for THz detection.
Brief CV of Dr. Kun Peng:
Kun Peng is currently a postdoctoral researcher working in the department of Physics, University of Oxford. She graduated with a bachelor’s degree in Materials Physics from Xi’an Jiaotong University (2008), followed with a master's degree in Atomic and Molecular Physics from Fudan University (2011). In 2012, she was awarded the International Postgraduate Research Scholarship and began her DPhil in the group of Distinguished Prof Chennupati Jagadish at the Australian National University (ANU). After thesis submission, she stayed at ANU to become a researcher assistant until Oct 2017, when she joined Prof. Michael Johnston’s Oxford THz Photonics Group at the University of Oxford. Her research specialises in the development of semiconductor nanomaterials for electronic and optoelectronic applications with a particular focus on the use of III-V semiconductor nanowires for terahertz (THz) detection. Her current research interests lie in exploring the nature of one-dimensional nanomaterials (such as nanowires, nanorods and nanotubes) and exploiting their exceptional properties for THz applications (such as THz sources, detectors and modulators).
Contact: Shujuan Cui (崔书娟）
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