ARC Nanotechnology Network
University of Melbourne - Micro- and Nano-optics Group

University of Melbourne - Micro- and Nano-optics Group

Name of Group Leader:

Kenneth B. Crozier  

Physical Address:

School of Physics
University of Melbourne
Victoria, 3010  

Phone:

+61 3 8344 2249  

Email:

kenneth.crozier@unimelb.edu.au  

Nanotechnology Research Programs/Activities:

We are a group of applied physicists, electrical engineers, materials scientists, and chemists working on a range of research problems in micro- and nano-optics. Recent areas of interest have included the demonstration of metasurfaces based on high-index materials, optical nanotweezers based on plasmonics and silicon photonics, quantum plasmonics, single molecule spectroscopy using optical nanoantennas, and nanowire-based photodetectors for multispectral imaging. To take a few examples of recent achievements, our group has:

Experimentally demonstrated, via surface-enhanced Raman spectroscopy, that quantum mechanical effects limit plasmonic enhancement (Nature Communications 2014)
Trapped nanoparticles using an optical tweezer consisting of a plasmonic nanostructure that focuses a laser beam to sub-wavelength spots (Nature Communications 2011)
Trapped and sensed microparticles using Si microring resonators (NanoLetters 2010)
Demonstrated plasmonic nanostructures for surface-enhanced Raman spectroscopy that achieve high performance via gaps as narrow as 3 nm (Small 2011) or via resonances at pump and Stokes frequencies (ACS Nano 2010)
Demonstrated microfluidic chips incorporating diffractive optical elements enabling high speed measurements of fluorescence from droplets at ~184,000 droplets/second (Lab Chip 2010)
Demonstrated that silicon nanowires can take a variety of (diameter-dependent) colors covering the entire visible spectrum, in marked contrast to the gray color of bulk silicon. The effect is readily observable by bright-field microscopy, and arises from the guided mode properties of the individual nanowires (NanoLett 2011)
The overarching goals of the group are to contribute to the fields of micro- and nano-optics AND to provide a rigorous training to graduate (e.g. PhD, MPhil) and undergraduate students and postdoctoral Research Fellows, to enable them to develop new solutions to research and engineering problems in their careers beyond the University of Melbourne. A common attribute amongst members is a strong drive to achieve in optics research. Group alumni have gone on to faculty appointments, industry positions, and postdoctoral fellowships in leading laboratories (including those of Nobel Prize winners).  

Scale of Nanotechnology Research Effort:

We just established our group here in the University of Melbourne. Currently, we have 2 research fellows, 1 Ph.D. student, 1 M. Phil student, and 5 undergraduate students in the lab. We are associated with both the school of physics and the department of electrical engineering  

Nanotechnology research facilities:

We have various optical characterisation tools in our lab. We perform nanofabrication in the school of physics and the Melbourne centre for nanofabrication.  

Participants

 

Collaboration Information

 

Group Websites:

http://kcrozier.eng.unimelb.edu.au/