Publications
795 results found
Gennaro SD, Roschuk TR, Maier SA, et al., 2016, Measuring chromatic aberrations in imaging systems using plasmonic nanoparticles, Optics Letters, Vol: 41, Pages: 1688-1691, ISSN: 1539-4794
We demonstrate a method to measure chromatic aberrations of microscope objectives with metallic nanoparticles using white light. Extinction spectra are recorded while scanning a single nanoparticle through a lens’s focal plane. We show a direct correlation between the focal wavelength and the longitudinal chromatic focal shift through our analysis of the variations between the scanned extinction spectra at each scan position and the peak extinction over the entire scan. The method has been tested on achromat and apochromat objectives using aluminum disks varying in size from 260–520 nm. Our method is straightforward, robust, low cost, and broadband with a sensitivity suitable for assessing longitudinal chromatic aberrations in high-numerical-aperture apochromatic corrected lenses.
Arroyo Huidobro P, Kraft M, Ren K, et al., 2016, Graphene, plasmons and transformation optics, Journal of Optics, Vol: 18, ISSN: 2040-8978
Here we study subwavelength gratings for coupling into graphene plasmons by means of an an-alytical model based on transformation optics that is not limited to very shallow gratings. Weconsider gratings that consist of a periodic modulation of the charge density in the graphene sheet,and gratings formed by this conductivity modulation together with a dielectric grating placed inclose vicinity of the graphene. Explicit expressions for the dispersion relation of the plasmon po-laritons supported by the system, and reectance and transmittance under plane wave illuminationare given. We discuss the conditions for maximising the coupling between incident radiation andplasmons in the graphene, finding the optimal modulation strength for a conductivity grating.
Geraci G, Hopkins B, Miroshnichenko AE, et al., 2016, Polarisation-independent enhanced scattering by tailoring asymmetric plasmonic systems, Nanoscale, Vol: 8, Pages: 6021-6027, ISSN: 2040-3372
Polarised light provides an efficient way for dynamic control over local optical properties of nanoscale plasmonic structures. Yet many applications that utilise control over the plasmonic near-field would benefit if the plasmonic device maintained the same magnitude of optical response for all polarisations. Here we show that completely asymmetric nanostructures can be designed to exhibit a broadband polarisation-independent and enhanced optical response. We provide both analytical and experimental results on two sets of plasmonic trimer nanostructures consisting of unequal nanodisks/apertures with different gap spacing. We show that, at certain inter-particle separations, enhanced far-field cross sections are independent to the incident polarisation, while still demonstrating nontrivial near-field control.
Della Picca F, Berte R, Rahmani M, et al., 2016, Tailored Hypersound Generation in Single Plasmonic Nanoantennas (vol 16, pg 1428, 2016), NANO LETTERS, Vol: 16, Pages: 2124-2124, ISSN: 1530-6984
Bak AO, Yoxall EO, Sarriugarte P, et al., 2016, Harnessing a Quantum Design Approach for Making Low-Loss Superlenses, NANO LETTERS, Vol: 16, Pages: 1609-1613, ISSN: 1530-6984
- Author Web Link
- Cite
- Citations: 6
Nielsen MP, Lafone L, Rakovich A, et al., 2016, Adiabatic nanofocusing in hybrid gap plasmon waveguides on the silicon-on-insulator platform, Nano Letters, Vol: 16, Pages: 1410-1414, ISSN: 1530-6992
We present an experimental demonstration of a new class of hybrid gap plasmon waveguides on the silicon-on-insulator (SOI) platform. Created by the hybridization of the plasmonic mode of a gap in a thin metal sheet and the transverse-electric (TE) photonic mode of an SOI slab, this waveguide is designed for efficient adiabatic nanofocusing simply by varying the gap width. For gap widths greater than 100 nm, the mode is primarily photonic in character and propagation lengths can be many tens of micrometers. For gap widths below 100 nm, the mode becomes plasmonic in character with field confinement predominantly within the gap region and with propagation lengths of a few microns. We estimate the electric field intensity enhancement in hybrid gap plasmon waveguide tapers at 1550 nm by three-photon absorption of selectively deposited CdSe/ZnS quantum dots within the gap. Here, we show electric field intensity enhancements of up to 167 ± 26 for a 24 nm gap, proving the viability of low loss adiabatic nanofocusing on a commercially relevant photonics platform.
Della Picca F, Berte R, Rahmani M, et al., 2016, Tailored Hypersound Generation in Single Plasmonic Nanoantennas., Nano Letters, Vol: 16, Pages: 1428-1434, ISSN: 1530-6992
Ultrashort laser pulses impinging on a plasmonic nanostructure trigger a highly dynamic scenario in the interplay of electronic relaxation with lattice vibrations, which can be experimentally probed via the generation of coherent phonons. In this Letter, we present studies of hypersound generation in the range of a few to tens of gigahertz on single gold plasmonic nanoantennas, which have additionally been subjected to predesigned mechanical constraints via silica bridges. Using these hybrid gold/silica nanoantennas, we demonstrate experimentally and via numerical simulations how mechanical constraints allow control over their vibrational mode spectrum. Degenerate pump-probe techniques with double modulation are performed in order to detect the small changes produced in the probe transmission by the mechanical oscillations of these single nanoantennas.
Schnitzer O, Giannini V, Craster RV, et al., 2016, Asymptotics of surface-plasmon redshift saturation at subnanometric separations, Physical Review B, Vol: 93, ISSN: 2469-9950
Many promising nanophotonics endeavors hinge upon the unique plasmonic properties of nanometallic structures with narrow nonmetallic gaps, which support superconcentrated bonding modes that singularly redshift with decreasing separations. In this Rapid Communication, we present a descriptive physical picture, complemented by elementary asymptotic formulas, of a nonlocal mechanism for plasmon redshift saturation at subnanometric gap widths. Thus, by considering the electron-charge and field distributions in the close vicinity of the metal-vacuum interface, we show that nonlocality is asymptotically manifested as an effective potential discontinuity. For bonding modes in the near-contact limit, the latter discontinuity is shown to be effectively equivalent to a widening of the gap. As a consequence, the resonance-frequency near-contact asymptotics are a renormalization of the corresponding local ones. Specifically, the renormalization furnishes an asymptotic plasmon-frequency lower bound that scales with the 1/4 power of the Fermi wavelength. We demonstrate these remarkable features in the prototypical cases of nanowire and nanosphere dimers, showing agreement between our elementary expressions and previously reported numerical computations.
Nielsen MP, Lafone L, Rakovich A, et al., 2016, Hybrid gap plasmon waveguides on the silicon-on-insulator platform for adiabatic nanofocusing
We present a new class of silicon hybrid gap plasmon waveguides designed for adiabatic nanofocusing. Using a 3-photon absorption process in quantum dots, we show a 167±26 intensity enhancement for a 24nm wide waveguide.
Sidiropoulos TPH, Röder R, Geburt S, et al., 2016, Ultrafast ZnO nanowire lasers: nanoplasmonic acceleration of gain dynamics at the surface plasmon polariton frequency
We report optically pumped hybrid photonic - plasmonic ZnO nanowire lasers operating near the surface plasmon frequency. Here, we use the non-linearity of the laser process itself to reveal the internal ~1 ps dynamics of these plasmonic lasers.
Lafone L, Nguyen N, Nielsen MP, et al., 2016, Printed Plasmonic GaAs Nanolasers
We present optically-pumped plasmonic GaAs nanolasers operating at room temperature. Built on suspended GaAs membranes, the etchless fabrication involves only a printed metal film, which defines the plasmonic cavity and confines the optical mode.
Paarmann A, Razdolski I, Caldwell JD, et al., 2016, Mid-Infrared Second Harmonic Spectroscopy Probing Surface Phonon Polariton Localization in SiC Nanopillars
We experimentally demonstrate mid-infrared second harmonic generation frequency-domain spectroscopy as a novel, highly sensitive approach to investigate the degree of sub-wavelength localization of surface phonon polaritons in SiC nanopillars.
Rahmani M, Gennaro SD, Giannini V, et al., 2016, Linearly Polarized Dipolar Second Harmonic Generation from Gold Nano-antennas by Controlling Their Radiation Phase, Progress in Electromagnetic Research Symposium (PIERS), Publisher: IEEE, Pages: 2292-2292
Mellor A, Riverola A, Hylton NP, et al., 2016, Simple Models for Complex Devices, Progress in Electromagnetic Research Symposium (PIERS), Publisher: IEEE, Pages: 4606-4606
Nielsen MP, Lafone L, Nguyen N, et al., 2016, Generating Intense Optical Fields with Hybrid-gap Plasmon Lasers, Progress in Electromagnetic Research Symposium (PIERS), Publisher: IEEE, Pages: 31-31
- Author Web Link
- Cite
- Citations: 4
Shibanuma T, Albella P, Maier SA, 2016, Efficient directional control of scattered field at optical frequency with subwavelength asymmetric dielectric dimers, 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), Publisher: IEEE, Pages: 331-333
Paarmann A, Razdolski I, Caldwell JD, et al., 2016, Mid-Infrared Second Harmonic Spectroscopy Probing Surface Phonon Polariton Localization in SiC Nanopillars, Conference on Lasers and Electro-Optics (CLEO), Publisher: IEEE, ISSN: 2160-9020
- Author Web Link
- Cite
- Citations: 1
Nielsen MP, Lafone L, Rakovich A, et al., 2016, Hybrid gap plasmon waveguides on the silicon-on-insulator platform for adiabatic nanofocusing, Conference on Lasers and Electro-Optics (CLEO), Publisher: IEEE, ISSN: 2160-9020
Beyer K, Stollhof L, Poetschke C, et al., 2016, TNF-related apoptosis-inducing ligand deficiency enhances survival in murine colon ascendens stent peritonitis, JOURNAL OF INFLAMMATION RESEARCH, Vol: 9
- Author Web Link
- Cite
- Citations: 5
Huidobro PA, Kraft M, Maier SA, et al., 2016, Graphene as a Tunable Plasmonic Metasurface with Transformation Optics, Progress in Electromagnetic Research Symposium (PIERS), Publisher: IEEE, Pages: 14-14
- Author Web Link
- Cite
- Citations: 1
Lafone L, Ngoc N, Nielsen MP, et al., 2016, Printed Plasmonic GaAs Nanolasers, Conference on Lasers and Electro-Optics (CLEO), Publisher: IEEE, ISSN: 2160-9020
Sidiropoulos TPH, Roeder R, Geburt S, et al., 2016, Ultrafast ZnO nanowire lasers: nanoplasmonic acceleration of gain dynamics at the surface plasmon polariton frequency, Conference on Lasers and Electro-Optics (CLEO), Publisher: IEEE, ISSN: 2160-9020
Maier SA, 2016, Dielectric platforms for surface-enhanced spectroscopies (Conference Presentation), Conference on Colloidal Nanoparticles for Biomedical Applications XI, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
Duffin TJ, Nielsen MP, Diaz F, et al., 2015, Degenerate four-wave mixing in silicon hybrid plasmonic waveguides, Optics Letters, Vol: 41, Pages: 155-158, ISSN: 1539-4794
Silicon-based plasmonic waveguides show high confinementwell beyond the diffraction limit. Various deviceshave been demonstrated to outperform their dielectriccounterparts at micrometre scales, such as linearmodulators, capable of generating high field confinementand improving device efficiency by increasingaccess to nonlinear processes, limited by ohmiclosses. By using hybridised plasmonic waveguide architecturesand nonlinear materials, silicon-based plasmonicwaveguides can generate strong nonlinear effectsover just a few wavelengths. We have theoreticallyinvestigated the nonlinear optical performance of twohybrid plasmonic waveguides (HPWG) with three differentnonlinear materials. Based on this analysis, thehybrid gap plasmon waveguide (HGPW), combinedwith the DDMEBT nonlinear polymer, shows a fourwavemixing (FWM) conversion efficiency of 16.4dBover a 1mm propagation length, demonstrating that plasmonicwaveguides can be competitive with standardsilicon photonics structures over distances three ordersof magnitude shorter.
Levy U, Berini P, Maier SA, et al., 2015, Focus Issue on surface plasmon photonics introduction, OPTICS EXPRESS, Vol: 23, Pages: 32075-32079, ISSN: 1094-4087
Albella P, Shibanuma T, Maier S, 2015, Switchable directional scattering of electromagnetic radiation with subwavelength asymmetric silicon dimers, Scientific Reports, Vol: 5, ISSN: 2045-2322
High refractive index dielectric nanoparticles show high promise as a complementary nanophotonics platform due to compared with plasmonic nanostructures low absorption losses and the co-existence of magnetic and electric resonances. Here we explore their use as resonantly enhanced directional scatterers.We theoretically demonstrate that an asymmetric dimer of silicon nanoparticles shows tuneable directional scattering depending on the frequency of excitation. This is due to the interference between dipoles excited in each nanoparticle, enabling directional control of the scattered light. Interestingly, this control can be achieved regardless of the polarization direction with respect to the dimer axis; however, difference in the polarization can shift the wavelengths at which the directional scattering is achieved. We also explore the application of such an asymmetric nanoantenna as a tuneable routing element in a nanometer scale a full numerical simulation, suggesting applications in optical nanocircuitry.
Pusch A, Oh S, Wuestner S, et al., 2015, A highly efficient CMOS nanoplasmonic crystal enhanced slow-wave thermal emitter improves infrared gas-sensing devices, Scientific Reports, Vol: 5, ISSN: 2045-2322
The application of plasmonics to thermal emitters is generally assisted by absorptive losses in the metal because Kirchhoff’s law prescribes that only good absorbers make good thermal emitters. Based on a designed plasmonic crystal and exploiting a slow-wave lattice resonance and spontaneous thermal plasmon emission, we engineer a tungsten-based thermal emitter, fabricated in an industrial CMOS process, and demonstrate its markedly improved practical use in a prototype non-dispersive infrared (NDIR) gas-sensing device. We show that the emission intensity of the thermal emitter at the CO2 absorption wavelength is enhanced almost 4-fold compared to a standard non-plasmonic emitter, which enables a proportionate increase in the signal-to-noise ratio of the CO2 gas sensor.
Schaich WL, 2015, Comment on "Surface Plasmons and Nonlocality: A Simple Model"., Phys Rev Lett, Vol: 115
A Comment on the Letter by Y. Luo, A. I. Fernandez-Dominguez, A. Wiener, S. A. Maier, and J. B. Pendry, Phys. Rev. Lett. 111, 093901 (2013).. The authors of the Letter offer a Reply.
Schaich WL, Luo Y, Fernandez-Dominguez AI, et al., 2015, Comment on "Surface Plasmons and Nonlocality: A Simple Model", PHYSICAL REVIEW LETTERS, Vol: 115, ISSN: 0031-9007
- Author Web Link
- Cite
- Citations: 4
Luo Y, Fernandez-Dominguez AI, Wiener A, et al., 2015, Reply to "Comment on “Surface Plasmons and Nonlocality: A Simple Model”, Physical Review Letters, Vol: 115, ISSN: 1079-7114
This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.