Dragomir N. Neshev

Australian National University

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Co-Authors

Yuri S. Kivshar

Australian National University

430

Andrey A. Sukhorukov

Australian National University

244

Wiesław Królikowski

Australian National University

175

Andrey E. Miroshnichenko

UNSW Sydney

147

Isabelle Staude

Friedrich Schiller University Jena

121

Mohsen Rahmani

Nottingham Trent University

112

Lei Xu

Nottingham Trent University

Thomas Pertsch

Friedrich Schiller University Jena

Alexander S. Solntsev

University of Technology Sydney

Manuel Decker

Friedrich Schiller University Jena

Cooperative Institutions

Australian National University

270

Centre for Ultrahigh Bandwidth Devices for Optical Systems

Centre National de la Recherche Scientifique

Friedrich Schiller University Jena

ARC Centre of Excellence for Transformative Meta-Optical Systems

Australian Research Council

Lomonosov Moscow State University

UNSW Sydney

Chinese Academy of Sciences

ITMO University

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Tunable Negative Refraction in Nonlinear Photonic Lattices

Frontiers in Optics (2005)

Christian R. Rosberg Dragomir N. Neshev Andrey A. Sukhorukov Wiesław Królikowski Yuri S. Kivshar

We predict theoretically and demonstrate experimentally tunable negative refraction of Bloch waves associated with the second band of an optically-induced lattice with a dynamically reconfigurable depth.

Negative Refraction

10.1364/fio.2005.jwa27

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Electrically programmable solid-state metasurfaces via flash localised heating

Light Science & Applications (2023)

Khosro Zangeneh Kamali Lei Xu Nikita Gagrani Hark Hoe Tan C. Jagadish

In the last decades, metasurfaces have attracted much attention because of their extraordinary light-scattering properties. However, their inherently static geometry is an obstacle to many applications where dynamic tunability in their optical behaviour is required. Currently, there is a quest to enable dynamic tuning of metasurface properties, particularly with fast tuning rate, large modulation by small electrical signals, solid state and programmable across multiple pixels. Here, we demonstrate electrically tunable metasurfaces driven by thermo-optic effect and flash-heating in silicon. We show a 9-fold change in transmission by <5 V biasing voltage and the modulation rise-time of <625 µs. Our device consists of a silicon hole array metasurface encapsulated by transparent conducting oxide as a localised heater. It allows for video frame rate optical switching over multiple pixels that can be electrically programmed. Some of the advantages of the proposed tuning method compared with other methods are the possibility to apply it for modulation in the visible and near-infrared region, large modulation depth, working at transmission regime, exhibiting low optical loss, low input voltage requirement, and operating with higher than video-rate switching speed. The device is furthermore compatible with modern electronic display technologies and could be ideal for personal electronic devices such as flat displays, virtual reality holography and light detection and ranging, where fast, solid-state and transparent optical switches are required.

10.1038/s41377-023-01078-6

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Citations (29)

Normal-incidence mid-infrared photodetection via intraband transitions in InGaAs/InP multiple quantum well nanowire arrays

Applied Physics Letters (2025)

Yue Bian Fanlu Zhang Zhe Li Dawei Liu Jingshi Yan

Recently, InGaAs/InP multiple quantum well nanowires grown by selective area epitaxy have been demonstrated with uniform morphology and high optical quality. The InGaAs quantum wells wrapping around the nanowire core are formed with both axial and radial components. As such the radial quantum well configuration presents a unique advantage for the realization of intraband absorption of normal-incidence light in the nanowires, which cannot be achieved in conventional planar quantum well structures due to polarization selection rules. We report here mid-infrared intraband transitions within the atmospheric window (3–5 μm) in InP nanowire arrays embedded with five InGaAs quantum wells under normal-incidence light. The light absorption coefficient of the quantum wells is modeled, and the absorption peak indicates a bound-to-continuum transition. The intraband photocurrent shows a linear dependence on the incident power, while the interband photoresponse is sublinear due to the surface states of the nanowires. These nanowires with radial quantum wells open up great opportunities for developing next-generation mid- to long-wavelength infrared photodetectors and focal plane arrays.

Photodetection

Indium gallium arsenide

10.1063/5.0242858

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Directionally Tunable Co- and Counter-Propagating Photon Pairs from a Nonlinear Metasurface

arXiv (Cornell University) (2024)

Maximilian A. Weissflog Jinyong Ma Jihua Zhang Tongmiao Fan Thomas Pertsch

Nonlinear metasurfaces have recently been established as a new platform for generating photon pairs via spontaneous parametric down-conversion. While for classical harmonic generation in metasurfaces a high level of control over all degrees of freedom of light has been reached, this capability is yet to be developed for photon pair generation. In this work, we theoretically and experimentally demonstrate for the first time precise control of the emission angle of photon pairs generated from a nonlinear metasurface. Our measurements show angularly tunable pair-generation with high coincidence-to-accidental ratio for both co- and counter-propagating emission. The underlying principle is the transverse phase-matching of guided-mode resonances with strong angular dispersion in a nonlinear lithium niobate metagrating. We provide a straightforward design strategy for photon pair generation in such a device and find very good agreement between the calculations and experimental results. Here we use all-optical emission angle tuning by means of the pump wavelength, however the principle could be extended to modulation via the electro-optic effect in lithium niobate. In sum, this work provides an important addition to the toolset of sub-wavelength thickness photon pair sources.

Spontaneous parametric down-conversion

10.1515/nanoph-2024-0122

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Citations (3)

Steering and Encoding the Polarization of the Second Harmonic in the Visible with a Monolithic LiNbO₃ Metasurface

ACS Photonics (2021)

Luca Carletti Attilio Zilli F. Moia Andréa Toma Marco Finazzi

Nonlinear metasurfaces constitute a key asset in meta-optics, given their ability to scale down nonlinear optics to sub-micrometer thicknesses. To date, nonlinear metasurfaces have been mainly realized using narrow band gap semiconductors, with operation limited to the near-infrared range. Nonlinear meta-optics in the visible range can be realized using transparent materials with high refractive index, such as lithium niobate (LiNbO3). Yet, efficient operation in this strategic spectral window has been so far prevented by the nanofabrication challenges associated with LiNbO3, which considerably limit the aspect ratio and minimum size of the nanostructures (i.e., meta-atoms). Here we demonstrate the first monolithic nonlinear periodic metasurface based on LiNbO3 and operating in the visible range. Realized through ion beam milling, our metasurface features a second-harmonic (SH) conversion efficiency of 2.40 × 10–8 at a pump intensity as low as 0.5 GW/cm2. By tuning the pump polarization, we demonstrate efficient steering and polarization encoding into narrow SH diffraction orders, opening novel opportunities for polarization-encoded nonlinear meta-optics.

10.1021/acsphotonics.1c00026

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Citations (95)

Localization of light in Bessel photonic lattices

Robert Fischer Dragomir N. Neshev Servando López-Aguayo Anton S. Desyatnikov Andrey A. Sukhorukov

We report on the experimental observation of nonlinear localization of light in azimuthally modulated Bessel photonic lattices. These lattices are optically induced in a photorefractive crystal and resemble multiple-core highly nonlinear microstructure fibers.

10.1109/acoft.2006.4519286

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Nonlocal Gap Solitons in Infiltrated Photonic Crystal Fibres

Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing (2008)

Francis Bennet Per Rasmussen Christian R. Rosberg Andrey A. Sukhorukov Ole Bang

We report on the first observation of nonlocal discrete gap solitons in infiltrated photonic crystal fibres. We employ the thermal defocusing nonlinearity of the liquid to study the soliton properties and the effects of boundaries of the periodic structure.

10.1364/fio.2008.fwl5

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Non-reciprocal geometric phase in nonlinear frequency conversion

Optics Letters (2017)

Kai Wang Yu Shi Alexander S. Solntsev Shanhui Fan Andrey A. Sukhorukov

We describe analytically and numerically the geometric phase arising from nonlinear frequency conversion and show that such a phase can be made non-reciprocal by momentum-dependent photonic transition. Such non-reciprocity is immune to the shortcomings imposed by dynamic reciprocity in Kerr and Kerr-like devices. We propose a simple and practical implementation, requiring only a single waveguide and one pump, while the geometric phase is controllable by the pump and promises robustness against fabrication errors.

Reciprocal

Reciprocity

Robustness

Frequency Conversion

10.1364/ol.42.001990

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Citations (17)

Nonlinear Optics

Optics and Photonics News (2004)

Jason W. Fleischer Dragomir N. Neshev Guy Bartal Tristram J. Alexander Oren Cohen

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Jason W. Fleischer, Dragomir N. Neshev, Guy Bartal, Tristram J. Alexander, Oren Cohen, Elena A. Ostrovskaya, Ofer Manela, Hector Martin, Jared Hudock, Igor Makasyuk, Zhigang Chen, Demetrios N. Christodoulides, Yuri S. Kivshar, Mordechai Segev, J. Meier, G. I. Stegeman, D. N. Christodoulides, Y. Silberberg, R. Morandotti, H. Yang, G. Salamo, M. Sorel, J. S. Aitchison, Hoonsoo Kang, and Yifu Zhu, "Nonlinear Optics," Optics & Photonics News 15(12), 30-32 (2004) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

Fleischer

10.1364/opn.15.12.000030

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Observation of surface gap solitons

Christian R. Rosberg Dragomir N. Neshev Wiesław Królikowski Yuri S. Kivshar Arnan Mitchell

We predict, in the framework of a nonlinear discrete model, and demonstrate experimentally in defocusing waveguide arrays, that self-localization near the edge of a photonic lattice can result in the formation of surface gap solitons.

Waveguide

Lattice (music)

10.1109/cleo.2006.4627794

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Citations (5)