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Crystals
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Interactions and Dynamics of Photon and Localized Energies in Nanoscale...
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Special Issue "Interactions and Dynamics of Photon and Localized Energies in Nanoscale Materials and Structures"

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystal Engineering".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 1720

Special Issue Editors

Prof. Dr. Felix Jaetae Seo

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Guest Editor
Department of Physics, Hampton University, Hampton, VA 23668, USA
Interests: nanophotonics; quantum optics; nanocrystals
Special Issues, Collections and Topics in MDPI journals
Dr. Tikaram Neupane

E-Mail Website
Guest Editor
The University of North Carolina at Pembroke, Pembroke, NC, USA
Interests: optical and electronic properties of nanomaterials

Special Issue Information

Dear Colleagues,

The optoelectronics and photonic application at the nanoscale and, specifically, the interaction of light and matter at the nanoscale, is a topic of rapidly increasing scientific importance and technological relevance. Nanoscale light–matter interactions are essential for the efficient conversion of light into chemical energy in biological light harvesting systems and for the light-to-current conversion in artificial photovoltaic devices. These interactions define the remarkable linear and especially nonlinear optical properties of colloidal nanocrystal (quantum dot and nanoplates) and other semiconductor nanomaterials, which depend on the symmetry and asymmetry of the optical medium, layer-dependent transitions, optical polarization chirality, time-reverse symmetry of valley-spin, exciton spin, and photon polarization. Therefore, the study of such a broad aspect of light–matter interaction is the key to understanding prospective photonic applications.

Prof. Dr. Felix Jaetae Seo
Dr. Tikaram Neupane
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

  • light–matter interaction
  • localized energy
  • photonic applications
  • nano and advanced materials

Published Papers (2 papers)

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Article
Electromagnetically Induced Transparency Analog of Asymmetric Perovskite Metamaterial in the THz Spectral Region
by
Tae-Han Kim
,
Bo Wha Lee
and
Felix Jaetae Seo
Crystals 2023, 13(7), 1090; https://doi.org/10.3390/cryst13071090 - 12 Jul 2023
Viewed by 485
Abstract
The analogy of electromagnetically induced transparency (EIT) in perovskite metamaterials is characterized by the numerical simulations in finite-difference time-domain (FDTD). The perovskite metamaterials consist of two cut wire resonators (CWRs) and a disk resonator (DR) on a polyimide substrate. The analysis revealed the [...] Read more.
The analogy of electromagnetically induced transparency (EIT) in perovskite metamaterials is characterized by the numerical simulations in finite-difference time-domain (FDTD). The perovskite metamaterials consist of two cut wire resonators (CWRs) and a disk resonator (DR) on a polyimide substrate. The analysis revealed the characteristic dynamics of the electromagnetic field, the near-field couplings of CWRs and DR, and the EIT-like spectral features of perovskite metamaterials as functions of the asymmetry parameter and polarization direction. The strong coupling and destructive interference of bright and bright–dark transitions in perovskite metamaterials displayed EIT-like transparency at 653.5 GHz with a high Q-factor of approximately 1470, a sensitivity of 531 GHz/RIU and a figure of merit of around 780. In addition, perovskite metamaterials exhibited slow light with a group delay of about 106 ps and a group index of approximately 3100. These results may provide an important perspective for understanding the coupling mechanism and applications of perovskite materials in slow-light devices, THz sensors, and tunable switching in THz spectral region. Full article
(This article belongs to the Special Issue Interactions and Dynamics of Photon and Localized Energies in Nanoscale Materials and Structures)
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Article
Spatial Self-Phase Modulation in Graphene-Oxide Monolayer
by
Tikaram Neupane
,
Bagher Tabibi
,
Wan-Joong Kim
and
Felix Jaetae Seo
Crystals 2023, 13(2), 271; https://doi.org/10.3390/cryst13020271 - 04 Feb 2023
Cited by 1 | Viewed by 909
Abstract
The spatial self-phase modulation (SSPM) of the optical field revealed the magnitude and polarity of nonlinear refraction coefficients of the graphene-oxide (GO) atomic layers in an aqueous base solution with a resonant excitation using a chopped quasi-static laser at 532 nm. The SSPM [...] Read more.
The spatial self-phase modulation (SSPM) of the optical field revealed the magnitude and polarity of nonlinear refraction coefficients of the graphene-oxide (GO) atomic layers in an aqueous base solution with a resonant excitation using a chopped quasi-static laser at 532 nm. The SSPM of the optical field as a result of the intrinsic nonlinear refraction coefficient of GO atomic layers and the spatial distribution of intensity displayed the concentric diffraction rings at the far field due to the coherent superposition of transverse wave vectors. The number of concentric rings as a function of the applied intensity revealed the nonlinear refraction coefficient of GO which was estimated to be ~–6.65 × 10−12 m2/W for the laser-excitation duration of ~0.32 s, where the negative polarity of nonlinear refraction coefficient was confirmed with the interference image profile of SSPM. The upper and vertical distortion of concentric rings at the far field at the longer laser-excitation duration of ~0.8 s indicates the distortion of the coherent superposition of transverse wave vectors due to the localized thermal vortex of GO in the aqueous solution that offers novel platforms of thermal metrology based on localized optical nonlinearity and temperature-sensitive all-optical switching. Full article
(This article belongs to the Special Issue Interactions and Dynamics of Photon and Localized Energies in Nanoscale Materials and Structures)
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