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Nonlinear & Microstructured Optical Materials
The Nonlinear & Microstructured Optical Materials Group is led by Professor Rob Eason.
The lithium niobate activity is led by Dr Sakellaris Mailis
Our mission is to identify and develop methods for the full utilization of the useful physical and optical properties of lithium niobate, a very gifted nonlinear optical ferroelectric crystal with a large presence in the photonics industry.
An important goal is to develop a complete material-processing toolbox which will enable the fabrication of complex multifunctional devices based on lithium niobate.
More specifically we strive to develop and understand the physics behind methods for:
- Ferroelectric domain engineering
- Direct writing of refractive and diffractive structures
- Surface and bulk micro-structuring
We are using a wide range of standard clean-room based micro-fabrication methods such as photolithography, ion beam milling, reactive ion etching, chemical etching, and deposition to non standard methods such as light assisted/induced ferroelectric domain inversion direct writing, inhibition of poling and preferential surface melting to gain control over the fabrication of useful combinations of domain engineered and microstructured arrangements on single crystal substrates that can be used to achieve multifunctional operation.
Our experience and practice range from material science through to photonics ensuring fast and substantial two way feedback from the characterization to fabrication level.
Topics and achievements
- All optical laser induced ferroelectric domain inversion
- Light assisted poling
- UV laser induced poling inhibition
- Fabrication of single crystal micro-cantilevers
- Ultra-smooth single crystal photonic micro-structures
- Direct UV writing of optical waveguides in lithium niobate
- UV laser induced super hydrophilic surfaces in lithium niobate
Image gallery: Achievable microstructures in lithium niobate
Research funding is provided by:
- EPSRC Portfolio Partnership in Photonics (grant reference EP/C515668/1)
- EU STREP "3D-DEMO" www.3d-demo.org/
Recently completed projects
GR/S47373/01 Light-induced domain engineering in ferroclectrics: a route to sub-micron poling
GR/S09999/01 Single-step UV direct-writing of channel waveguides in lithium niobate and lithium tantalate single crystals
GR/R46663/01 Feasibility study of focussed ion beam (FIB) direct write for micro-photonic applications
GR/R47295/01 Light-induced frustrated etching (LIFE) studies in LiNbO3: latency effects and periodic micro-structuring
GR/N00302/01 ROPA: Microstructured LiNbO3: Applications to MEMS technology
To search for a full list of our publications visit our publications database
- University of Bonn http://lxsa.physik.uni-bonn.de/hertz/index_e.html
- Technical University of Athens http://www.ntua.gr/en_index.htm
- National Hellenic Research Foundation http://www.eie.gr/
- EPFL http://www.epfl.ch/
- CNRS-FEMTO http://www.femto-st.fr/
- ABCD Technology http://www.abcd-technology.com/
- SAFC http://www.sigmaaldrich.com/safc-global/en-us/home.html
- Saes Getters http://www.saesgetters.com/
- INFLPR http://www.inflpr.ro/
The FAST Lab
The FAST Lab (Femtosecond Applications of Science & Technology) is a multi-user facility that hosts several projects from this group more...
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