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Optical Nanomaterial Spectroscopy for Photonic Applications (ONSPA)

Optical Nanomaterial Spectroscopy for Photonic Applications group led by A/Prof. James W. M. Chon aims to understand and control how energy decays in optical nanomaterial by means of linear and nonlinear microscopy/spectroscopy and investigate their use in data storage, photodynamic cancer therapy, biolabelling, optical circuitry and solar cells.

Group Overview:

Group Leader:
To bridge between fundamental science and application of optical nanomaterials.
The Optical Nanomaterial Spectroscopy for Photonic Applications (ONSPA) group aims to study single nanoparticles and molecules to understand and control the physical properties and energy decay paths for photonic application in multidimensional optical storage, biolabelling, cancer therapy and solar cells.
Single Nanoparticle and Molecule Detection Laboratory (AS116, AS117, AS125, ATC201) at the Swinburne University Hawthorn Campus.
Contact James Chon

Research Projects and Affiliations:

Multidimensional Optical Data Storage

In this project, we aim to develop multidimensional optical recording medium based on plasmonic nanorods where the spectral and polarization properties add additional dimensions to in recording methods. The new dimensions multiply storage limits without increasing the physical size of the medium. In collaboration with Prof. Jun Taniguchi at Tokyo University of Science

More Information | PhD Opportunities


Gold nanorod reshaping spectroscopy

We study single gold nanorod reshaping by femtosecond pulsed laser irradiation, and understand the dynamics and surface diffusion at the tip. This will help develop stable linear and nonlinear radiative markers for biomedical applications.

More Information | PhD Opportunities


Two-photon luminescence of plasmonic nanoparticles

We study the two-photon luminescence efficiency of single gold nanorods of different geometry by means of linear and non-linear microscopy/spectroscopy, to understand their energy decay paths and control their quantum efficiency by geometry variation and surface functionalization. This will help develop highly efficient linear and nonlinear radiative markers for future nano and  biophotonic applications.

More Information | PhD Opportunities


Graphene hybridization with plasmonic nanostructures

We study single layer graphene hybridized with plasmonic nanosheets using Raman spectroscopy and dark-field scattering, to understand the interaction between the two materials. In collaboration with Byungkwon Lim’s group at Sungkyunkwan University.

More Information | PhD Opportunities


ONSPA Equipment

The Laboratory is equipped with Titanium Sapphire femtosecond laser in tunable near-infrared range (700 nm ~ 1000 nm), and multiple line continuous wave lasers (405 nm, 457 nm, 488 nm, 514 nm, 532 nm, 633 nm, 700 nm, 900 nm) in the visible and NIR range. Optical microscopy/spectroscopy system consists of dual photomultiplier tube (PMT) and CCD detection that are attached at the dual port spectrograph for wavelength selective microscopy and spectroscopy, which can operate in scanning confocal, two-photon luminescence, dark-field scattering, total-internal reflection or epi-fluorescence microscopy modes. A separate Hamamatsu PMT is available to operate in photon-counting mode for non-linear fluorescence such as two-photon luminescence. Linear and non-linear optical properties of single particles and objects can be measured using this system.

Current Research Students

Mr Timothy Chow  2010 – current, PhD Project title: Image correlation spectroscopy of plasmonic random media

Mr Salmaan Syed Rashid  2012 – current, PhD Project title: Graphene hybridization with plasmonic nanoplates for nonlinear optical phenomenon

Mr Rakesh Parayil Parameswaran Nair 2016 – current, PhD Project title: Spatial control of membrane protein function using plasmonic nanoparticles

Mr Stuart Flanders  2016 – current, Honours Project title:  Theoretical analysis on the field enhancement of plasmonic nanoparticle surfaces

Former Members

Dr Arif Siddiquee Conferred in 2015, currently a postdoc at LaTrobe University. Thesis title: Effect of tip geometry and crystallinity on two-photon luminescence and scattering of single gold nanorods 

Dr A. S. M. Mohsin Conferred in 2015. Thesis title: Image correlation spectroscopy study of aggregation and uptake kinetics of gold nanoparticles in biological cells

Dr Adam Taylor Conferred in 2015, currently a postdoc at Technical University of Eindhoven, Netherlands. Thesis title: Photothermal reshaping mechanism of gold nanorods and its application to rod alignment and optical data storage

Dr. Peter Zijlstra  Conferred in 2009, currently a Professor at Technical University of Eindhoven, Netherlands. Thesis title: Photothermal properties of gold nanorods and their application to five-dimensional optical recording

Group Leader:
Associate Professor
James W. M. Chon

ph: +61 3 9214 4326


Research Projects: