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Recent Advances in Luminescence and Spectroscopy of Nanomaterials
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Recent Advances in Luminescence and Spectroscopy of Nanomaterials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: closed (10 February 2023) | Viewed by 3414

Special Issue Editors

Dr. Boris Kalinic

E-Mail Website
Guest Editor
NanoStructures Group (NSG), Department of Physics and Astronomy, University of Padova, Via Marzolo 8, I-35131 Padova, Italy
Interests: nanophotonics; plasmonics; metamaterials; photoluminescence; nonlinear optics; nanotechnology; hierarchical nanostructures
Dr. Tiziana Cesca

E-Mail Website
Guest Editor
NanoStructures Group (NSG), Department of Physics and Astronomy, University of Padova, Via Marzolo 8, I-35131 Padova, Italy
Interests: nanophotonics; nanolasers; photoluminescence; nonlinear optics; plasmonics; nanoarrays; nanostructures; metamaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent years, nanoscience and nanotechnology have been gaining great importance and increased scientific attention due to the possibility of obtaining novel properties from materials when they are manipulated at the nanometric scale. At this scale, indeed, changing the morphology implies changing also the physical and chemical properties of matter, many of which are no longer intrinsic but depend on the size, shape, and dielectric environment. One of the most striking examples in this sense are the optical properties of materials when their dimensions are reduced to the nanoscale. Some notable examples of luminescent nanostructures able to outperform traditional materials by several orders of magnitude in term of brightness, efficiency, and tunability can be found in semiconductor nanoparticles, rare-earth doped nanostructures, noble metal nanoclusters, carbon-based nanomaterials, perovskites, organic-inorganic composites, 2D materials, and color centers in nanodiamonds.   These nanomaterials are of fundamental importance for a wide range of applications, such as optical communication, light emitting diodes, lasing, sensing, fluorescent probes in medical diagnostic, photovoltaics, and quantum optics, and advanced spectroscopic techniques (e.g., time-resolved photoluminescence, infrared and Raman spectroscopy, circular dichroism) are needed for their optical characterization.

In this multidisciplinary Special Issue of Materials, entitled “Recent Advances in Luminescence and Spectroscopy of Nanomaterials”, we want to focus on the latest advances in the synthesis, optical properties, and applications of nanomaterials and nanostructures. Original research papers as well as review contributions are welcome in this issue.

Dr. Boris Kalinic
Dr. Tiziana Cesca
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. Materials is an international peer-reviewed open access semimonthly 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

  • photoluminescence
  • nanomaterials
  • metal nanoclusters
  • quantum dots
  • 2D materials
  • color centers
  • optical sensitizers
  • quantum confinement
  • nanoantennae
  • optical spectroscopy
  • nanocarbon photonics
  • biological labeling
  • radiative recombination
  • excited states
  • lasing
  • Purcell effect
  • single photon emitters
  • Raman spectroscopy SERS
  • circular dichroism
  • infrared spectroscopy

Published Papers (2 papers)

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Research

13 pages, 2691 KiB  
Article
Driving Third-Order Optical Nonlinearities in Photoluminescent Si Nanoparticles by Nitrogen Co-Implantation in a Silica Matrix
by Jhovani Bornacelli, Fernando Arturo Araiza-Sixtos, Carlos Torres-Torres, Marco Antonio Hernández-Acosta, Alicia Oliver and Raúl Rangel-Rojo
Materials 2022, 15(16), 5670; https://doi.org/10.3390/ma15165670 - 18 Aug 2022
Cited by 3 | Viewed by 1319
Abstract
The photoluminescence and third-order nonlinear optical effects of co-implanted silicon nanoparticles and nitrogen ions in a silica matrix were studied. Experimental evidence shows the potential of nitrogen ions for changing optical properties exhibited by silicon nanoparticles implanted in an integrated system. The modification [...] Read more.
The photoluminescence and third-order nonlinear optical effects of co-implanted silicon nanoparticles and nitrogen ions in a silica matrix were studied. Experimental evidence shows the potential of nitrogen ions for changing optical properties exhibited by silicon nanoparticles implanted in an integrated system. The modification of the optical bandgap and photoluminescent intensity in the studied nanomaterials by the incorporation of nitrogen was analyzed. Standard two−wave mixing experiments were conducted using nanosecond and picosecond laser pulses at 532 nm wavelength. At this off-resonance condition, only multiphoton excitation can promote electrons at energies above the optical bandgap of the silicon nanoparticles. The picosecond results show that the co-implanted sample with nitrogen exhibits a three-fold enhancement of the nonlinear Kerr response. Femtosecond z-scan measurements were undertaken at 800 nm in order to explore the modification of the ultrafast nonlinear response of the samples that revealed a purely electronic Kerr nonlinearity together to saturable absorption of the SiNPs in the near-infrared. Remarkably, femtosecond results reveal that nitrogen co-implantation in the SiNPs system derives from the quenching of the third-order nonlinear optical behavior. These findings pointed out a simple approach for engineering the optical bandgap of nanocomposites, which can be controlled by a doping process based on ion-implanted nitrogen. It is highlighted that the enhanced light-matter interactions induced by nitrogen implantation can be useful for developing nonlinear integrated silicon photonics nanodevices with low power excitation. Full article
(This article belongs to the Special Issue Recent Advances in Luminescence and Spectroscopy of Nanomaterials)
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11 pages, 1982 KiB  
Article
Selective Control of Eu3+ Radiative Emission by Hyperbolic Metamaterials
by Domenico Genchi, Boris Kalinic, Ionut Gabriel Balasa, Tiziana Cesca and Giovanni Mattei
Materials 2022, 15(14), 4923; https://doi.org/10.3390/ma15144923 - 15 Jul 2022
Viewed by 1482
Abstract
In recent years the quest for novel materials possessing peculiar abilities of manipulating light at the nanoscale has been significantly boosted due to the strict demands of advanced nanophotonics and quantum technologies. In this framework radiative decay engineering of quantum emitters is of [...] Read more.
In recent years the quest for novel materials possessing peculiar abilities of manipulating light at the nanoscale has been significantly boosted due to the strict demands of advanced nanophotonics and quantum technologies. In this framework radiative decay engineering of quantum emitters is of paramount importance for developing efficient single-photon sources or nanolasers. Hyperbolic metamaterials stand out among the best cutting-edge candidates for photoluminescence control owing to their potentially unlimited photonic density of states and their ability to sustain high-k modes that allow us to strongly enhance the radiative decay rate of quantum light emitters. The aim of the present paper is to show how Au/Al2O3 hyperbolic multilayers can be used to selectively control the photoluminescence of coupled Eu3+ emitters. We point out an enhancement of the Eu3+ transitions when they are in the hyperbolic regime of the metamaterials and a significant alteration of the ED and MD branching ratios by changing the emitter–metamaterial distance. Full article
(This article belongs to the Special Issue Recent Advances in Luminescence and Spectroscopy of Nanomaterials)
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