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Summary of Chih-Wei Hsu's activities


My research activities involve the fabrication and optical characterization of III-nitride quantum- and nano-structures, such as nanowires, quantum dots. The main fabrication technique employed is metal-organic chemical vapor deposition (MOCVD). There is plenty of room you can play with when materials go small. Concerning the optical properties, I am interested in surface-induced optical properties of nanowires as well as peculiar emission properties of quantum dots. The former one may act as optical sensor to bio-molecular by monitoring the changes of optical properties induced by the surface conditions, while the later may act as photon sources for quantum information applications by emitting photons with specific energies, polarization- and time-correlations. 

My current work is to explore and to improve the electrical properties of III-nitride-based high electron mobility transistor (HEMT) with various designs. 

Selected publications

  • Direct generation of linearly-polarized photon emission with designated orientations from site-controlled InGaN quantum dots
    A. Lundskog, C. W. Hsu, K. F. Karlsson, S. Amoly, D. Nilsson, U. Forsberg, E. Janzén and P. O. Holtz
    Light: Science & Applications 3, e139 (2014)
  • The Charged Exciton in an InGaN Quantum Dot on a GaN Pyramid
    C. W. Hsu, E. S. Moskalenko, M. O. Eriksson, A. Lundskog, K. F. Karlsson, U. Forsberg, E. Janzén and P. O. Holtz
    Applied Physics Letters 103, 013109 (2013)      pdf available

  • InGaN Quantum Dot Formation Mechanism on Hexagonal GaN/InGaN/GaN Pyramids
    A. Lundskog, J. Palisaitis, C. W. Hsu, M. O. Eriksson, K. F. Karlsson, L. Hultman, P. O. Ĺ. Persson, U. Forsberg, P. O. Holtz and E. Janzén
    Nanotechnology 23, 305708 (2012)
  • Single Excitons in InGaN Quantum Dots on GaN Pyramids Arrays
    C. W. Hsu, A. Lundskog, K. F. Karlsson, U. Forsberg, E. Janzén and P. O. Holtz
    Nano Letters 11, 2415 (2011)
  • Optical Properties of Surface-Functionalized GaN Nanowires
    C. W. Hsu, A. Ganguly, C. P. Chen, C. C. Kuo, P. P. Paskov, P. O. Holtz, L. C. Chen and K. .H Chen
    Journal of Applied Physics 109, 053523 (2011)      pdf available

  • Enhanced emission of (In,Ga) nitride nanowires embedded with self-assembled quantum dots
    C. W. Hsu, A. Ganguly, C. H. Liang, Y. T. Hung, C. T. Wu G. H. Hsu, Y. F. Chen, C. C. Chen, K. H. Chen, L. C. Chen
    Advanced Functional Matererials 18, 938 (2008)

A more complete list of publications can be found at DiVA LiU E-press.

Current teaching

Undergraduate Courses
  • TFYY47 Semiconductor Physics (6 ECTS) for Y4-5, lab assistant
Chih-Wei Hsu


Host: Erik Janzén


E-mail: cwhsu@ifm.liu.se
Phone: +46 (0)13 28 26 99

Room K208 (Physics Building)

Semiconductor Materials, IFM
Linköping University
Linköping, Sweden


Responsible for this page: Fredrik Karlsson
Last updated: 02/11/14