News Archives
November 2017
Romolo Savo's paper about his work performed in external pageSylvain Gigan's group at Kastler Brossel Laboratory in Paris is out now: external page'Observation of mean path length invariance in light-scattering media',Science 10 Nov 2017. Congrats to all our colleagues !
DownloadRead more here. (PDF, 227 KB)
Follow them on Twitter external page@romolo_savo, external page@sylvaingigan.
August 2017
- external pageCheck how we experimentally show the influence of the facet in the emission spatial spectrum and we theoretically investigate five different facet designs for shaping the emitted light spatial spectrum. These designs present a diversity of options for manipulating the light distribution. For instance, one design shows large angular light deflection (more than 80° in the radial direction), which is relevant for integrated circuits. A second design shows homogeneous spreading across the normal direction with azimuthal selectivity, which is suitable for local light delivery applications since it acts like a point-source at the facet of the nanowaveguide.
-external pageIn Nano Letters, Flavia Timpu et al. showed enhanced second-harmonic generation (SHG) from a hybrid metal–dielectric nanodimer consisting of an inorganic perovskite nanoparticle of barium titanate (BaTiO3) coupled to a metallic gold (Au) nanoparticle. BaTiO3–Au nanodimers of 100 nm/80 nm sizes are fabricated by sequential capillarity-assisted particle assembly.
We welcome Romolo Savo, who joins our team !
June 2017
We have research/ master projects available for ETH students:
- Download3D photonic crystal woodpile structures out of barium titanate. (PDF, 291 KB) E-mail for more details: .
- DownloadDevelopment of High Resolution Nonscanning Multiphoton Polarimetric Microscope. (PDF, 408 KB)E-mail for more details: .
We welcome Fabian Kaufmann to our group. Fabian will pursue his PhD on Perovskite Nanostructures.
Mai 2017
New group picture is here.
March 2017
- Mariia Timofeeva obtained the BRIDGE Proof of Concept grant. Congrats ! This first call attracted 101 proposals, submitted by young researchers from across Switzerland. Eleven ideas have now been funded.
February 2017
- We welcome Viola Vogler-Neuling to our group. Viola will pursue her PhD and continue the work on Solution Processing. We also say Good Bye to Dr. Nicholas Hendricks who finished his Post-doc on Solution Processing. We wish both Viola and Nick a lot of success with their new assignements!
- Read our latest papers:
- M. Escalé, A. Sergeyev, R. Geiss, and R. Grange, "Nonlinear mode switching in lithium niobate nanowaveguides to control light directionality," Opt. Express 25, 3013-3023 (2017). Read more.
- A. Sergeyev, M. Escalé, and R. Grange, "Generation and tunable enhancement of a sum-frequency signal in lithium niobate nanowires." Journal of Physics D: Applied Physics 50.4 (2016): 044002. Read more.
- Open Positions available, apply online :
- Postdoc researcher in flat photonic devices for nonlinear optics:
external pagehttps://apply.refline.ch/845721/5230/pub/en/index.html - PhD student position in flat photonic devices for nonlinear optics: external pagehttps://apply.refline.ch/845721/5229/pub/en/index.html
December 2016
- Read our latest paper: F. Timpu, A. Sergeyev, N. R. Hendricks, and R. Grange, “Second-Harmonic Enhancement with Mie Resonances in Perovskite Nanoparticles,” ACS Photonics, asap, Dec. 2016. external pageRead more
- Open Positions available, apply online :
Postdoc researcher in solution processing for nonlinear photonics:
external pagehttps://apply.refline.ch/845721/5081/pub/1/index.html
PhD position in Perovskite nanowires:
external pagehttps://apply.refline.ch/845721/5032/pub/1/index.html
October 2016
- Rachel Grange has been awarded an ERC Starting Grant. Read the full article in the ETH News here.
- Read our latest paper: M. Timofeeva, A. Bouravleuv, G. Cirlin, I. Shtrom, I. Soshnikov, M. Reig Escalé, A. Sergeyev, and R. Grange, “Polar Second-Harmonic Imaging to Resolve Pure and Mixed Crystal Phases along GaAs Nanowires,” Nano Lett., 16, 10, 6290, (2016). external pageRead more
September 2016
Rachel Grange gave a Tedx talk on Nanocrystal to change the light color. external pageWatch the video in French here.
December 2015
The Optical Nanomaterial Group and the ITMO university in Saint Petersburg will work together on All-dielectric and hybrid nanostructures for biophotonics applications.external page
July 2015
Chapter published in the Active Plasmonic Nanomaterials edited by Luciano De Sio and highlighted in external pageNature Photonic, New Titles at a Glance.
You can read our chapter about Nonlinear Optical Enhancement with Plasmonic Core-Shell Nanowires here.
June 2015
Have a look at our recent paper published in ACS Photonics in June 2015 about
external pageEnhancing Guided Second-Harmonic Light in Lithium Niobate Nanowires.
We experimentally demonstrate practical approaches to enhance second-harmonic (SH) generation in individual lithium niobate nanowires (NWs) with a sub-micrometer cross-section and length up to tens of micrometers. We establish that parametric interactions of guided modes propagating along the NW determine the SH output power, which can be therefore controlled by the NW length. We show that the SH power is increased by about 84 times at wavelengths corresponding to modal phase-matching. Importantly, at non-phase-matched wavelengths the SH power can be improved by a factor of up to 9.3 by adjusting the NW length with a focused ion beam. We also characterize SH emission directionality, which can be further tailored for applications in integrated optical circuits and nonlinear microscopy.