Advances in Polaritons

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: closed (20 July 2022) | Viewed by 5263

Special Issue Editors

School of Physics, Sun Yat-sen University, Guangzhou 510275, China
Interests: first principle calculation; semiconductor doping; Raman; field emission; phonon polariton
Special Issues, Collections and Topics in MDPI journals
Graduate Institute of Photonics, National Changhua University of Education, Changhua City 500, Taiwan
Interests: phononic crystal; optomechanical; optical and acoustic metamaterial

Special Issue Information

Dear Colleagues,

Polaritons are light–matter hybrid quasiparticles. Polaritons inherit their attributes from both their light and matter constituents. More specifically, a polariton is a quantum mechanical superposition of a photon with a matter excitation, the latter being a collective mode in solids and superconducting circuits or an electron in atoms, molecules or even superconducting qubits. They can originate in different physical phenomena: conduction electrons in graphene and topological insulators (surface plasmon polaritons), infrared-active phonons in polar crystals (phonon polaritons), excitons in dichalcogenide materials (exciton polaritons), superfluidity in FeSe- and Cu-based superconductors with high critical temperature Tc (Cooper-pair polaritons), and magnetic resonances (magnon polaritons).

They offer a practical approach toward nanoscale light trapping and manipulation. Beyond nano-optical technologies, images of polaritonic standing and traveling waves contain rich insights into quantum phenomena occurring in the host material supporting polaritons, and they provide an approach toward optics-based materials research. Alongside future advances in the understanding of the physics and interactions of polaritons, solutions to application challenges may be anticipated in areas such as loss compensation, nanoscale lasing, quantum optics, and nanomanipulation.

The aim of the current Special Issue is to cover promising, recent, and novel research trends in polaritons. Areas to be covered in this Special Issue may include, but are not limited to:

  • theory;
  • simulation;
  • characterization;
  • application.

Dr. Weiliang Wang
Prof. Dr. Fu-Li Hsiao
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • phonon polariton
  • plasmon polariton
  • exciton polariton
  • Cooper-pair polariton
  • magnon polariton

Published Papers (3 papers)

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Research

9 pages, 1484 KiB  
Article
Robust UV Plasmonic Properties of Co-Doped Ag2Te
Crystals 2022, 12(10), 1469; https://doi.org/10.3390/cryst12101469 - 17 Oct 2022
Viewed by 922
Abstract
Ag2Te is a novel topological insulator system and a new candidate for plasmon resonance due to the existence of a Dirac cone in the low-energy region. Although the optical response spectrum of Ag2Te has been studied by theoretical and [...] Read more.
Ag2Te is a novel topological insulator system and a new candidate for plasmon resonance due to the existence of a Dirac cone in the low-energy region. Although the optical response spectrum of Ag2Te has been studied by theoretical and experimental methods, the plasmon resonance and stability of Co-doped Ag2Te remain elusive. Here, we theoretically report a new unconventional UV plasmon mode and its stability in Co-doped Ag2Te. Through density functional theory (DFT), we identify a deep UV plasmon mode within 15–40 eV, which results from the enhanced inter-band transition in this range. The deep UV plasmon is important for detection and lithography, but they have previously been difficult to obtain with traditional plasmon materials such as noble metals and graphene, while most of which only support plasmons in the visible and infrared spectra. Furthermore, we should highlight that the high-energy dielectric function is almost invariant under different doping amounts, indicating that the UV plasmon of Ag2Te is robust under Co doping. Our results predict a spectrum window of a robust deep UV plasmon mode for Ag2Te-related material systems. Full article
(This article belongs to the Special Issue Advances in Polaritons)
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10 pages, 11089 KiB  
Article
Graphene-Integrated Plasmonic Metamaterial for Manipulation of Multi-Band Absorption, Based on Near-Field Coupled Resonators
Crystals 2022, 12(4), 525; https://doi.org/10.3390/cryst12040525 - 09 Apr 2022
Cited by 6 | Viewed by 1846
Abstract
We demonstrated a multi-band plasmonic metamaterial absorber (MA), based on the near-field coupled resonators. In addition to the individual resonances of resonators in the proposed structure, which were split-ring resonator (SRR) and cross-shape structures, another resonance was also excited owing to the coupling [...] Read more.
We demonstrated a multi-band plasmonic metamaterial absorber (MA), based on the near-field coupled resonators. In addition to the individual resonances of resonators in the proposed structure, which were split-ring resonator (SRR) and cross-shape structures, another resonance was also excited owing to the coupling of resonators, revealing a triple-band absorption. Furthermore, to control the absorption behavior, on the top of the SRRs, the identical SRRs made of graphene ink were pasted. By increasing the resistance of graphene ink, the coupling strength was weakened, changing the triple-band absorption to a dual-band one. Our work might be useful as the controllable devices, based on graphene-integrated plasmonic MA, such as filters, detectors and energy harvesters. Full article
(This article belongs to the Special Issue Advances in Polaritons)
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9 pages, 1965 KiB  
Article
Broadband Active Control of Transverse Scattering from All-Dielectric Nanoparticle
Crystals 2021, 11(8), 920; https://doi.org/10.3390/cryst11080920 - 07 Aug 2021
Cited by 2 | Viewed by 1736
Abstract
Steering electromagnetic scattering by subwavelength objects is usually accompanied by the excitation of electric and magnetic modes. The Kerker effect, which relies on the precise overlapping between electric and magnetic multipoles, is a potential approach to address this challenge. However, fundamental limitations on [...] Read more.
Steering electromagnetic scattering by subwavelength objects is usually accompanied by the excitation of electric and magnetic modes. The Kerker effect, which relies on the precise overlapping between electric and magnetic multipoles, is a potential approach to address this challenge. However, fundamental limitations on the reconfigurability and tunability challenge their future implementation in practical applications. Here, we demonstrate a design approach by applying coherent control to a silicon nanodisk. By utilizing an experimentally feasible two-wave excitation, this coherent light-by-light control enables a highly reconfigurable, broadband, and tunable transverse scattering, extending the feasibility of unidirectional scattering in various practical scenarios, including on-chip integrations and optical communications. Full article
(This article belongs to the Special Issue Advances in Polaritons)
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