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Photonics
Special Issues
Recent Advances in Nonlinear Optics: From Fundamentals to Applications
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Recent Advances in Nonlinear Optics: From Fundamentals to Applications

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Optical Interaction Science".

Deadline for manuscript submissions: closed (10 December 2024) | Viewed by 3006

Special Issue Editor

Prof. Dr. Anderson Stevens Leônidas Gomes

E-Mail Website
Guest Editor
Physics Department, Universidade Federal of Pernambuco, Recife, PE, Brazil
Interests: nonlinear optics; nanophotonics; biophotonics; random lasers
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nonlinear optics (NLO) is a well-established research field, and its advances since 1961, approximately one year after the invention of the first laser, have achieved unthinkable developments and applications, from the basic understanding of light–matter interaction to the development of characterization techniques, with applications that range from optical communications to biophotonics. The exploitation of NLO techniques in the world of nanoscience and nanotechnology has attained fantastic achievements, leading to the establishment of fields such as nonlinear nanophotonics, or nonlinear plasmonics and nanoplasmonics when a metallic/non-metallic interface is present. More recently, going beyond the classical regime, quantum nonlinear optics has been the subject of intense research.

This Special Issue will publish manuscripts that encompass a diversity of aspects under the broad umbrella of "Recent Advances in Nonlinear Optics: From Fundamentals to Applications".

All theoretical, numerical, and experimental papers are welcome for submission. Topics include, but are not limited to, the following:

  • Coherent generation and amplification of light through nonlinear optical methods;
  • Nonlinear optics in 1D, 2D and 3D architectures;
  • Nonlinear optics in plasmonics and nanoplasmonics;
  • Nonlinear quantum optics;
  • Nonlinear optical imaging modalities;
  • Nonlinear optics in disordered media;
  • Nonlinear optics in planar waveguides;
  • Novel nonlinear optical effects;
  • Nonlinear optics applications.

Prof. Dr. Anderson Stevens Leônidas Gomes
Guest Editor

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. Photonics 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 2400 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

  • nonlinear optics
  • nonlinear quantum optics
  • nonlinear optical effects

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

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Research

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11 pages, 2378 KiB  
Article
Femtosecond Third-Order Nonlinear Electronic Responses of 2D Metallic NbSe2
by Cecília L. A. V. Campos, Igor Gonçalves, Jessica E. Q. Bautista, Alyson Carvalho, Ali M. Jawaid, Robert Busch, Richard Vaia and Anderson S. L. Gomes
Photonics 2024, 11(10), 930; https://doi.org/10.3390/photonics11100930 - 30 Sep 2024
Viewed by 692
Abstract
This manuscript reports on the third-order nonlinear optical responses of two-dimensional metallic NbSe2 suspended in acetonitrile (ACN). The standard Z-scan technique was employed with 190 fs optical pulses at 790 nm, a repetition rate of 750 Hz, and an intensity ranging from [...] Read more.
This manuscript reports on the third-order nonlinear optical responses of two-dimensional metallic NbSe2 suspended in acetonitrile (ACN). The standard Z-scan technique was employed with 190 fs optical pulses at 790 nm, a repetition rate of 750 Hz, and an intensity ranging from 30 to 300 GW/cm2. A self-focusing nonlinear refractive index (NLR), n2=+(1.8±0.1)×10−15 cm2/W, and a nonlinear absorption (NLA) coefficient, α2=+(3.5±0.2)×10−2 cm/GW, were measured, with the NLA arising from a two-photon process. Aiming to further understand the material’s electronic nonlinearities, we also employed the Optical Kerr Gate (OKG) to evaluate the material’s time response and measure the NLR coefficient in an optical intensity range different from the one used in the Z-scan. For optical pulses of 170 fs at 800 nm and a repetition rate of 76 MHz, the modulus of the NLR coefficient was measured to be n2=4.2±0.5×10−14 cm2/W for intensities up to 650 MW/cm2, with the material’s time response limited by the pulse duration. The ultrafast time response and electronic optical nonlinearities are explained based on the material’s 2D structure. Full article
(This article belongs to the Special Issue Recent Advances in Nonlinear Optics: From Fundamentals to Applications)
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11 pages, 1759 KiB  
Article
Gold Nanoparticles at a Liquid Interface: Towards a Soft Nonlinear Metasurface
by Delphine Schaming, Anthony Maurice, Frédéric Gumy, Micheál D. Scanlon, Christian Jonin, Hubert H. Girault and Pierre-François Brevet
Photonics 2024, 11(9), 789; https://doi.org/10.3390/photonics11090789 - 23 Aug 2024
Cited by 1 | Viewed by 706
Abstract
Optical second-harmonic generation (SHG) is achieved using adsorbed gold nanoparticles (AuNPs) with an average diameter of 16 nm at the aqueous solution–air interface in reflection. A detailed analysis of the depth profile of the SHG intensity detected shows that two contributions appear in [...] Read more.
Optical second-harmonic generation (SHG) is achieved using adsorbed gold nanoparticles (AuNPs) with an average diameter of 16 nm at the aqueous solution–air interface in reflection. A detailed analysis of the depth profile of the SHG intensity detected shows that two contributions appear in the overall signal, one arising from the aqueous solution–air interface that is sensitive to the AuNP surface excess and one arising from the bulk aqueous phase. The latter is an incoherent signal also known as hyper-Rayleigh scattering (HRS). The results agree with those of an analysis involving Gaussian beam propagation optics and a Langmuir-like isotherm. Discrepancies are revealed for the largest AuNP concentrations used and indicate a new route for the design of soft metasurfaces. Full article
(This article belongs to the Special Issue Recent Advances in Nonlinear Optics: From Fundamentals to Applications)
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Review

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14 pages, 6316 KiB  
Review
Emerging Techniques for Nonlinear Optical Spectroscopy of Disordered and Highly Scattering Materials
by Albert S. Reyna, Anderson M. Amaral and Cid B. de Araújo
Photonics 2024, 11(7), 650; https://doi.org/10.3390/photonics11070650 - 11 Jul 2024
Cited by 1 | Viewed by 1055
Abstract
Scattering materials have been of considerable research interest due to their unique optical properties that may enable applications throughout the area of disordered photonics, particularly in fields such as Random Lasers, nonlinear (NL) microscopy in biomedical research, and optical thermometry. However, the complex [...] Read more.
Scattering materials have been of considerable research interest due to their unique optical properties that may enable applications throughout the area of disordered photonics, particularly in fields such as Random Lasers, nonlinear (NL) microscopy in biomedical research, and optical thermometry. However, the complex structures of these materials make traditional NL spectroscopic techniques unsuitable for studies, as the materials of interest can cause large multiple scattering of light in addition to presenting spatial heterogeneities. Fortunately, new techniques, such as the Scattered Light Imaging Method (SLIM), the Intensity Correlation scan (IC-scan), and the Reflection Intensity Correlation scan (RICO-scan), have recently emerged, providing researchers with more appropriate ways to study disordered and scattering NL materials. These techniques allow for a deeper characterization of the NL optical properties of highly scattering materials, which are essential for applications in photonics, optoelectronics, and biophotonics, for example. In this paper, we discuss these innovative techniques, which can offer insights into the properties of materials of great potential for disordered photonics. Full article
(This article belongs to the Special Issue Recent Advances in Nonlinear Optics: From Fundamentals to Applications)
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