Imperial College London

Professor Ortwin Hess

Faculty of Natural SciencesDepartment of Physics

Leverhulme Chair in Metamaterials
 
 
 
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Contact

 

+44 (0)20 7594 7586o.hess Website

 
 
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Location

 

806Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

271 results found

Chikkaraddy R, Turek VA, Kongsuwan N, Benz F, Carnegie C, van de Goor T, de Nijs B, Demetriadou A, Hess O, Keyser UF, Baumberg JJet al., 2018, Mapping Nanoscale Hotspots with Single-Molecule Emitters Assembled into Plasmonic Nanocavities Using DNA Origami, NANO LETTERS, Vol: 18, Pages: 405-411, ISSN: 1530-6984

JOURNAL ARTICLE

Gric T, Hess O, 2018, Surface waves supported by the nanostructured semiconductor metamaterials, Journal of Electromagnetic Waves and Applications, Vol: 32, Pages: 591-600, ISSN: 0920-5071

JOURNAL ARTICLE

Gross H, Hamm JM, Tufarelli T, Hess O, Hecht Bet al., 2018, Near-field strong coupling of single quantum dots, SCIENCE ADVANCES, Vol: 4, ISSN: 2375-2548

JOURNAL ARTICLE

Kim M, Oh SS, Hess O, Rho Jet al., 2018, Frequency-domain modelling of gain in pump-probe experiment by an inhomogeneous medium, JOURNAL OF PHYSICS-CONDENSED MATTER, Vol: 30, ISSN: 0953-8984

JOURNAL ARTICLE

Kongsuwan N, Demetriadou A, Chikkaraddy R, Benz F, Turek VA, Keyser UF, Baumberg JJ, Hess Oet al., 2018, Suppressed Quenching and Strong-Coupling of Purcell-Enhanced Single-Molecule Emission in Plasmonic Nanocavities, ACS PHOTONICS, Vol: 5, Pages: 186-191, ISSN: 2330-4022

JOURNAL ARTICLE

Page AF, Hamm JM, Hess O, 2018, Polarization and plasmons in hot photoexcited graphene, PHYSICAL REVIEW B, Vol: 97, ISSN: 2469-9950

JOURNAL ARTICLE

Pusch A, Yoshida M, Hylton NP, Mellor A, Vaquero-Steiner A, Phillips CC, Hess O, Ekins-Daukes NJet al., 2018, The purpose of a photon ratchet in intermediate band solar cells, Pages: 1-4

© 2017 IEEE. The intermediate band solar cell (IBSC) concept aims to improve upon the Shockley-Queisser limit for single bandgap solar cells by also making use of below bandgap photons through sequential absorption processes via an intermediate band (IB). In order for this concept to be translated into more efficient solar cells there are still challenges to overcome; one of the most important is the increased recombination (radiative as well as non-radiative) associated with the additional states in the bandgap. A proposal to mitigate those recombination losses is the introduction of a photon ratchet into the IBSC, which effectively trades some of the energy of the excited electrons against these recombination losses. We show here that this can lead to substantial improvements even in the radiative limiting efficiency, where no non-radiative recombination is taken into account and that this advantage is especially prominent for IBSCs in which the transitions into and out of the IB are not very absorptive, a case commonly encountered for current IBSC proposals.

CONFERENCE PAPER

Vaianella F, Hamm JM, Hess O, Maes Bet al., 2018, Strong Coupling and Exceptional Points in Optically Pumped Active Hyperbolic Metamaterials, ACS PHOTONICS, Vol: 5, Pages: 2486-2495, ISSN: 2330-4022

JOURNAL ARTICLE

Vaquero-Stainer A, Yoshida M, Hylton NP, Pusch A, Curtin O, Frogley M, Wilson T, Clarke E, Kennedy K, Ekins-Daukes NJ, Hess O, Phillips CCet al., 2018, Semiconductor nanostructure quantum ratchet for high efficiency solar cells, COMMUNICATIONS PHYSICS, Vol: 1, ISSN: 2399-3650

JOURNAL ARTICLE

Baek IH, Hamm JM, Ahn KJ, Kang BJ, Oh SS, Bae S, Choi SY, Hong BH, Yeom D-I, Min B, Hess O, Jeong YU, Rotermund Fet al., 2017, Boosting the terahertz nonlinearity of graphene by orientation disorder, 2D MATERIALS, Vol: 4, ISSN: 2053-1583

JOURNAL ARTICLE

Bello F, Page AF, Pusch A, Hamm JM, Donegan JF, Hess Oet al., 2017, Combining epsilon-Near-Zero Behavior and Stopped Light Energy Bands for Ultra-Low Reflection and Reduced Dispersion of Slow Light, SCIENTIFIC REPORTS, Vol: 7, ISSN: 2045-2322

JOURNAL ARTICLE

Choi HJ, Baek IH, Kang BJ, Kim H-D, Oh SS, Hamm JM, Pusch A, Park J, Lee K, Son J, Jeong YUK, Hess O, Rotermund F, Min Bet al., 2017, Control of terahertz nonlinear transmission with electrically gated graphene metadevices, SCIENTIFIC REPORTS, Vol: 7, ISSN: 2045-2322

JOURNAL ARTICLE

Demetriadou A, Hamm JM, Luo Y, Pendry JB, Baumberg JJ, Hess Oet al., 2017, Spatiotemporal Dynamics and Control of Strong Coupling in Plasmonic Nanocavities, ACS PHOTONICS, Vol: 4, Pages: 2410-2418, ISSN: 2330-4022

JOURNAL ARTICLE

Gric T, Hess O, 2017, Tunable surface waves at the interface separating different graphene-dielectric composite hyperbolic metamaterials, OPTICS EXPRESS, Vol: 25, Pages: 11466-11476, ISSN: 1094-4087

JOURNAL ARTICLE

Gric T, Hess O, 2017, Surface plasmon polaritons at the interface of two nanowire metamaterials, JOURNAL OF OPTICS, Vol: 19, ISSN: 2040-8978

JOURNAL ARTICLE

Kerber RM, Fitzgerald JM, Reiter DE, Oh SS, Hess Oet al., 2017, Reading the Orbital Angular Momentum of Light Using Plasmonic Nanoantennas, ACS PHOTONICS, Vol: 4, Pages: 891-896, ISSN: 2330-4022

JOURNAL ARTICLE

Kim T-T, Oh SS, Kim H-D, Park HS, Hess O, Min B, Zhang Set al., 2017, Electrical access to critical coupling of circularly polarized waves in graphene chiral metamaterials, SCIENCE ADVANCES, Vol: 3, ISSN: 2375-2548

JOURNAL ARTICLE

Kivshar YS, Barnes WL, Hess O, Zheludev Net al., 2017, New horizons for nanophotonics., Philos Trans A Math Phys Eng Sci, Vol: 375, ISSN: 1364-503X

JOURNAL ARTICLE

Ren G, Yudistira D, Nguyen TG, Khodasevych I, Schoenhardt S, Berean KJ, Hamm JM, Hess O, Mitchell Aet al., 2017, Experimental demonstration of two-dimensional hybrid waveguide-integrated plasmonic crystals on silicon-on-insulator platform, APL PHOTONICS, Vol: 2, ISSN: 2378-0967

JOURNAL ARTICLE

Saba M, Hamm JM, Baumberg JJ, Hess Oet al., 2017, Group Theoretical Route to Deterministic Weyl Points in Chiral Photonic Lattices, PHYSICAL REVIEW LETTERS, Vol: 119, ISSN: 0031-9007

JOURNAL ARTICLE

Tsakmakidis KL, Hess O, Boyd RW, Zhang Xet al., 2017, Ultraslow waves on the nanoscale, SCIENCE, Vol: 358, ISSN: 0036-8075

JOURNAL ARTICLE

Chikkaraddy R, de Nijs B, Benz F, Barrow SJ, Scherman OA, Rosta E, Demetriadou A, Fox P, Hess O, Baumberg JJet al., 2016, Single-molecule strong coupling at room temperature in plasmonic nanocavities, NATURE, Vol: 535, Pages: 127-130, ISSN: 0028-0836

JOURNAL ARTICLE

Curtin OJ, Yoshida M, Pusch A, Hylton NP, Ekins-Daukes NJ, Phillips CC, Hess Oet al., 2016, Quantum Cascade Photon Ratchets for Intermediate-Band Solar Cells, IEEE JOURNAL OF PHOTOVOLTAICS, Vol: 6, Pages: 673-678, ISSN: 2156-3381

JOURNAL ARTICLE

Dolan JA, Saba M, Dehmel R, Gunkel I, Gu Y, Wiesner U, Hess O, Wilkinson TD, Baumberg JJ, Steiner U, Wilts BDet al., 2016, Gyroid Optical Metamaterials: Calculating the Effective Permittivity of Multidomain Samples, ACS PHOTONICS, Vol: 3, Pages: 1888-1896, ISSN: 2330-4022

JOURNAL ARTICLE

Guazzotti S, Pusch A, Reiter DE, Hess Oet al., 2016, Dynamical calculation of third-harmonic generation in a semiconductor quantum well, PHYSICAL REVIEW B, Vol: 94, ISSN: 2469-9950

JOURNAL ARTICLE

Hamm JM, Page AF, Bravo-Abad J, Garcia-Vidal FJ, Hess Oet al., 2016, Nonequilibrium plasmon emission drives ultrafast carrier relaxation dynamics in photoexcited graphene, PHYSICAL REVIEW B, Vol: 93, ISSN: 1098-0121

JOURNAL ARTICLE

Hylton NP, Hinrichsen TF, Vaquero-Stainer AR, Yoshida M, Pusch A, Hopkinson M, Hess O, Phillips CC, Ekins-Daukes NJet al., 2016, Photoluminescence upconversion at GaAs/InGaP2 interfaces driven by a sequential two-photon absorption mechanism, PHYSICAL REVIEW B, Vol: 93, ISSN: 2469-9950

JOURNAL ARTICLE

Mertens J, Demetriadou A, Bowman RW, Benz F, Kleemann M-E, Tserkezis C, Shi Y, Yang HY, Hess O, Aizpurua J, Baumberg JJet al., 2016, Tracking Optical Welding through Groove Modes in Plasmonic Nanocavities, NANO LETTERS, Vol: 16, Pages: 5605-5611, ISSN: 1530-6984

JOURNAL ARTICLE

Oh SS, Wood JJ, Kim SH, Kee CS, Hess Oet al., 2016, Localized toroidal dipole moment of spoof surface plasmon polaritons

© 2015 IEEE. At infrared wavelengths, we demonstrate subwavelength scale localization of spoof surface plasmon polaritons. Based on an analytical model and numerical simulations, we show that the defect mode has toroidal dipole moment and high Q factor.

CONFERENCE PAPER

Pusch A, Yoshida M, Hylton NP, Mellor A, Phillips CC, Hess O, Ekins-Daukes NJet al., 2016, Limiting efficiencies for intermediate band solar cells with partial absorptivity: the case for a quantum ratchet, PROGRESS IN PHOTOVOLTAICS, Vol: 24, Pages: 656-662, ISSN: 1062-7995

JOURNAL ARTICLE

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