C32.

Project title: Optical Properties and Applications of Self-assembled Nanostructures

Self assembled nanostructures such as nanowires and nanoribbons can be fabricated inexpensively with remarkable optical quality comparable, or superior, to state-of-the-art, but expensive, top-down approaches (based on epitaxial methods (MBE, MOCVD) plus selective etching (e-beam-, ion-beam, or photo-, lithography).  Semiconductors nanostructures are thus very attractive candidates for optical device fabrication such as sensors, lasers, waveguides, and solar cells.  Adequate understanding of the nanostructuresí optical properties their dependence on preparation conditions are fundamental for the successful commercialization of such devices.

In this project the optical properties determined by variable temperature photoluminescence, Raman, and cathodoluminescence spectroscopies will correlated to the structural and elemental characterization of nanostructures (SEM, TEM, SAED, XRD, EDX).  Such results will be used to advance the design and performance characteristics of optical and optoelectronic devices based on self-assembled nanostructures.

Supervisor: Dr. J. Antonio Zapien (apjazs@cityu.edu.hk)

Suitable for: M. Phil. /Ph.D.

Number of students: 3.