Self-oscillations in nonlinear torsional metamaterials

Liu, M; Powell, DA; Shadrivov, IV; Lapine, M; Kivshar, YS

Self-oscillations in nonlinear torsional metamaterials

Liu, M Powell, DA Shadrivov, IV Lapine, M

Kivshar, YS

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Publication Type:: Journal Article
Citation:: New Journal of Physics, 2013, 15
Issue Date:: 2013-07-01

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Field	Value	Language
dc.contributor.author	Liu, M	en_US
dc.contributor.author	Powell, DA	en_US
dc.contributor.author	Shadrivov, IV	en_US
dc.contributor.author	Lapine, M https://orcid.org/0000-0002-3557-929X	en_US
dc.contributor.author	Kivshar, YS	en_US
dc.date.issued	2013-07-01	en_US
dc.identifier.citation	New Journal of Physics, 2013, 15	en_US
dc.identifier.issn	1367-2630	en_US
dc.identifier.uri	http://hdl.handle.net/10453/116162
dc.description.abstract	We study the nonlinear dynamics of torsional meta-molecules - sub-wavelength resonators with strong coupling between electromagnetic excitation and rotational deformation - and show that such structures may undergo self-oscillations. We develop a semi-analytical model to evaluate the electromagnetic-elastic coupling in such structures. By analysing the local stability of the system, we reveal two different mechanisms leading to self-oscillations. Contrary to many previously studied optomechanical systems, self-oscillations of torsional meta-molecules can be extremely robust against mechanical damping. Due to the chiral nature of the structure, a consequence of self-oscillations in this system is dynamic nonlinear optical activity, which can be actively controlled by a range of parameters such as the field strength and polarization of the incident wave. © IOP Publishing and Deutsche Physikalische Gesellschaft.	en_US
dc.relation.ispartof	New Journal of Physics	en_US
dc.relation.isbasedon	10.1088/1367-2630/15/7/073036	en_US
dc.subject.classification	Fluids & Plasmas	en_US
dc.title	Self-oscillations in nonlinear torsional metamaterials	en_US
dc.type	Journal Article
utslib.citation.volume	15	en_US
utslib.for	0204 Condensed Matter Physics	en_US
utslib.for	02 Physical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access
pubs.publication-status	Published	en_US
pubs.volume	15	en_US

Abstract:

We study the nonlinear dynamics of torsional meta-molecules - sub-wavelength resonators with strong coupling between electromagnetic excitation and rotational deformation - and show that such structures may undergo self-oscillations. We develop a semi-analytical model to evaluate the electromagnetic-elastic coupling in such structures. By analysing the local stability of the system, we reveal two different mechanisms leading to self-oscillations. Contrary to many previously studied optomechanical systems, self-oscillations of torsional meta-molecules can be extremely robust against mechanical damping. Due to the chiral nature of the structure, a consequence of self-oscillations in this system is dynamic nonlinear optical activity, which can be actively controlled by a range of parameters such as the field strength and polarization of the incident wave. © IOP Publishing and Deutsche Physikalische Gesellschaft.

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http://hdl.handle.net/10453/116162