Arseny AlexeevUniversity of Exeter | UoE · College of Engineering, Mathematics and Physical Sciences
Arseny Alexeev
PhD, University of Exeter
About
33
Publications
8,678
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
600
Citations
Citations since 2017
Introduction
Additional affiliations
August 2020 - present
EPSRC UK Metamaterials Network
Position
- Coordinator of Industrial Forum
April 2020 - present
Centre for Metamaterial Research and Innovation
Position
- Member of the Board of Advisors
January 2018 - March 2021
Education
March 2010 - March 2013
September 2006 - September 2008
Field of study
- Physics and Techniques of Semiconductors
September 2002 - September 2006
Field of study
- Physics and Techniques of Semiconductors
Publications
Publications (33)
An optical waveguide combiner includes an optical waveguide substrate and an optical input region. The optical input region includes an optical input diffractive grating integrated in, or disposed on, the optical waveguide substrate. An optical output region includes an optical output diffractive grating integrated in, or disposed on, the optical w...
There is disclosed a waveguide for use in an augmented reality or virtual reality display. The waveguide comprises a plurality of optical structures in a photonic crystal. The plurality of optical structures are arranged in an array to provide at least two diffractive optical elements. Each of the two diffractive optical elements is configured to r...
An optical structure, for use in a battery powered augmented or virtual reality display, comprising a: waveguide 52; input diffractive optical structure 54; and output diffractive optical structure divided into first 62 and second 64 portions. The output portions 62, 64 comprises a first high efficiency diffraction grating (30, Fig. 3) overlaid, in...
An optical device for use in an augmented reality or virtual reality display, comprising: a waveguide (2) having first and second surfaces; a first input diffractive optical element (3) arranged on the first surface of the waveguide and configured to receive light from a projector (1), to couple a first portion of the light into the waveguide so th...
The article has been amended to correct Figure 6 and a typographical error.
Phase-change materials, such as the well-known ternary alloy Ge 2 Sb 2 Te 5 , are essential to many types of photonic devices, from re-writeable optical disk memories to more recent developments such as phase-change displays, reconfigurable optical metasurfaces, and integrated phase-change photonic devices and systems. The successful design and dev...
An approach for chemical sensing based on an ultra-thin tunable metamaterial band-pass IR transmission filter is proposed. Simulations supporting the concept are presented, with high field- enhancement and transmission coinciding with an analyte’s absorption peak.
All-dielectric metasurfaces comprising arrays of nanostructured high-refractive-index materials are re-imagining what is achievable in terms of the manipulation of light. However, the functionality of conventional dielectric-based metasurfaces is fixed by design; thus, their optical response is locked in at the fabrication stage. A far wider range...
All-dielectric metasurfaces and nanoantennas offer unprecedented flexibility and efficiency of manipulation of light at the nanoscale. Still, the functionality of conventional dielectric-based devices is fixed-by-design, i.e. the response is locked-in at the fabrication stage. To address the challenges offered by modern nanophotonics, active, dynam...
We report a novel reconfigurable metasurface based on the combination of all-dielectric arrays of silicon meta-atoms, with deeply subwavelength (< λ0/150) Ge2Sb2Te5 layers. Our approach allows to selectively and individually control electric and magnetic resonances.
All-dielectric metasurfaces consisting of arrays of nanostructured high-refractive-index materials, typically Si, are re-writing what is achievable in terms of the manipulation of light. Such devices support very strong magnetic, as well as electric, resonances, and are free of ohmic losses that severely limit the performance of their plasmonic cou...
We outline a range of proposals on using quantum rings and nanohelices for terahertz device implementations. We show that an Aharonov-Bohm quantum ring system and a double-gated quantum ring system both permit control over the polarization properties of the associated terahertz radiation. In addition, we review the superlattice properties of a math...
Perfect absorber type devices are well-suited to many applications, such as solar cells, spatial light modulators, bio-sensors, and highly-sensitive photo-detectors. In such applications, a method for the design and fabrication of devices in a simple and efficient way, while at the same time maintaining design control over the key performance chara...
The use of small Ge2Sb2Te5 inclusions in combination with hybrid dielectric/plasmonic metasurfaces is discussed. Our approach shows good potential in the development of high efficiency, compact and ultra-fast optical components with in-situ switching capabilities at telecom frequencies.
This chapter is devoted to optical properties of so-called Aharonov-Bohm quantum rings (quantum rings pierced by a magnetic flux resulting in Aharonov-Bohm oscillations of their electronic spectra) in external electromagnetic fields. It studies two problems. The first problem deals with a single-electron Aharonov-Bohm quantum ring pierced by a magn...
The combination of chalcogenide phase-change materials with optical metamaterial arrays is exploited to create new forms of dynamic, tuneable and reconfigurable photonic devices including perfect absorbers, modulators, beam steerers and filters.
Graphene-based materials are being widely explored for a range of biomedical applications, from targeted drug delivery to biosensing, bioimaging and use for antibacterial treatments, to name but a few. In many such applications, it is not graphene itself that is used as the active agent, but one of its chemically functionalized forms. The type of c...
The development of flat, compact beam-steering devices with no bulky moving parts is opening up a new route to a variety of exciting applications, such as LIDAR scanning systems for autonomous vehicles, robotics and sensing, free-space, and even surface wave optical signal coupling. In this paper, the design, fabrication and characterization of inn...
The combination of chalcogenide phase-change materials with optical metamaterial arrays is exploited to create new forms of dynamic, tuneable and reconfigurable photonic devices including perfect absorbers, modulators, beam steerers and filters.
Tetrahedral amorphous (ta-C) carbon-based memory devices have recently gained traction due to their good scalability and promising properties like nanosecond switching speeds. However, cycling endurance is still a key challenge. In this paper, we present a model that takes local fluctuations in sp2 and sp3 content into account when describing the c...
Graphene oxide (GO) resistive memories offer the promise of low-cost environmentally-sustainable fabrication, high mechanical flexibility and high optical transparency, making them ideally suited to future flexible and transparent electronics applications. However, the dimensional and temporal scalability of GO memories, i.e. how small they can be...
http://ieeexplore.ieee.org/document/7777081/
We report a novel approach for the fabrication of micro- and nano-scale graphene devices via the in situ plasma functionalization and in situ lithographic patterning of large-area graphene directly on CVD catalytic metal (Cu) substrates. This enables us to create graphene-based devices in their entirety prior to any transfer processes, simplifying...
One of the most distinctive features of graphene is its huge
inter-Landau-level splitting in experimentally attainable magnetic fields which
results in the room-temperature quantum Hall effect. In this Letter we
calculate the longitudinal conductivity induced by two-phonon scattering in
graphene in a quantizing magnetic field at elevated temperatur...
This thesis is devoted to optical properties of Aharonov-Bohm quantum rings in external electromagnetic fields. It contains two problems. The first problem deals with a single-electron Aharonov-Bohm quantum ring pierced by a magnetic flux and subjected to an in-plane (lateral) electric field. We predict magneto-oscillations of the ring electric dip...
A single-mode microcavity with an embedded Aharonov-Bohm quantum ring, which
is pierced by a magnetic flux and subjected to a lateral electric field, is
studied theoretically. It is shown that external electric and magnetic fields
provide additional means of control of the emission spectrum of the system. In
particular, when the magnetic flux throu...
Magneto-oscillations of the electric dipole moment are predicted and analyzed
for a single-electron nanoscale ring pierced by a magnetic flux (an
Aharonov-Bohm ring) and subjected to an electric field in the ring's plane.
These oscillations are accompanied by periodic changes in the selection rules
for inter-level optical transitions in the ring al...
Magneto-oscillations of the electric dipole moment are predicted and analyzed for a single-electron nanoscale ring pierced by a magnetic flux (an Aharonov-Bohm ring) and subjected to an electric field in the ring's plane.
These oscillations are accompanied by periodic changes in the selection rules for inter-level optical transitions in the ring al...
Questions
Question (1)
I had some experience with the following systems:
1. NanoBeam nB5 (http://www.nanobeam.co.uk/index.php?option=com_content&view=article&id=26&Itemid=48) - compact, cheap and performs at the same level as more expensive systems.
2 . JBX-9500FS (https://www.jeolusa.com/PRODUCTS/Photomask-Direct-Write-Lithography/Electron-Beam-Lithography/JBX-9500FS) - several people recommended JEOL as one of best e-beam lithography systems in the world.
Can anyone recommend other good e-beam systems with resolution down to 20 nm and capable of writing areas of approx. 4x4cm? Also, minimum stitching errors, focus mapping.
Thank you!
Projects
Projects (2)
WAFT - Wearable and Flexible Technologies Enabled by Advanced Thin-film Manufacture and Metrology.
Background: Wearable and textile-embedded (opto)electronics, device manufacturing on flexible substrate and system-integrated energy generation techniques offer exciting prospects for the development of next-generation advanced materials. The market potential for such technologies is huge, with estimates of a market size of $77 billion by 2023 (IDtechEx). The main challenges are the lack of reliability, performance limitations of (opto)electronics on flexible substrates, and the lack of flexible power sources.
Aim: To accelerate the development of wearable and flexible technologies by integrating device component using advanced functional materials along with scalable, cost-effective and reliable manufacturing techniques.
