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Applied Sciences
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Recent Advances and Future Trends in Nanophotonics Ⅱ
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Recent Advances and Future Trends in Nanophotonics Ⅱ

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Applied Physics General".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 9062
Related special issue: Recent Advances and Future Trends in Nanophotonics https://www.mdpi.com/journal/applsci/special_issues/Advances_Trends_Nanophotonics

Special Issue Editors

Dr. Maria Antonietta Ferrara

E-Mail Website
Guest Editor
Institute of Applied Sciences and Intelligent Systems, Unit of Naples, National Research Council, Via P. Castellino 111, 80131 Napoli, Italy
Interests: nonlinear optics at the nanoscale; stimulated Raman scattering; silicon photonics; holography; label-free imaging
Special Issues, Collections and Topics in MDPI journals
Dr. Principia Dardano

E-Mail Website
Guest Editor
Institute of Applied Sciences and Intelligent Systems, Unit of Naples, National Research Council, Via P. Castellino 111, 80131 Napoli, Italy
Interests: photonic and plasmonic nanomaterials; metamaterials and metasurfaces; photonic crystals; nanofabrication; nanocharacterization; imaging; sensing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanophotonics has emerged as a multidisciplinary frontier of science and engineering. Due to its great potential to contribute to breakthroughs in many areas of technology, nanophotonics is capturing the interest of many researchers from different fields.

This Special Issue of Applied Sciences on “Recent Advances and Future Trends in Nanophotonics” aims to provide an overview of the latest developments in nanophotonics and its roles in different application domains. Topics of discussion include but are not limited to the exploration of new directions of nanophotonic science and technology that enable technological breakthroughs in high-impact areas such as information processing, communications, biomedical and life sciences, military, transport, energy harvesting and storage, and the environment and conservation.

We invite authors to contribute original research articles and review articles from different subfields of nanophotonics that will contribute to providing an interdisciplinary overview of this fascinating line of research.

Dr. Maria Antonietta Ferrara
Dr. Principia Dardano
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. Applied Sciences 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 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

  • materials for photonics and plasmonics
  • photonic crystals, metamaterials, and metasurfaces
  • nanofabrication and nanocharacterization
  • nanobiophotonics: sensing, nanomedicine
  • nano-optoelectronics
  • green nanophotonics, e.g., photovoltaics
  • nonlinear optics at nanoscale
  • quantum optics and computing at the nanoscale
  • modeling and simulation at the nanoscale

Published Papers (5 papers)

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Research

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12 pages, 1019 KiB  
Article
Polarization Sensitivity in Scattering-Type Scanning Near-Field Optical Microscopy—Towards Nanoellipsometry
by Felix G. Kaps, Susanne C. Kehr and Lukas M. Eng
Appl. Sci. 2023, 13(18), 10429; https://doi.org/10.3390/app131810429 - 18 Sep 2023
Viewed by 720
Abstract
Electric field enhancement mediated through sharp tips in scattering-type scanning near-field optical microscopy (s-SNOM) enables optical material analysis down to the 10-nm length scale and even below. Nevertheless, the out-of-plane electric field component is primarily considered here due to the lightning rod effect [...] Read more.
Electric field enhancement mediated through sharp tips in scattering-type scanning near-field optical microscopy (s-SNOM) enables optical material analysis down to the 10-nm length scale and even below. Nevertheless, the out-of-plane electric field component is primarily considered here due to the lightning rod effect of the elongated s-SNOM tip being orders of magnitude stronger than any in-plane field component. Nonetheless, the fundamental understanding of resonantly excited near-field coupled systems clearly allows us to take profit from all vectorial components, especially from the in-plane ones. In this paper, we theoretically and experimentally explore how the linear polarization control of both near-field illumination and detection can constructively be implemented to (non-)resonantly couple to selected sample permittivity tensor components, e.g., explicitly to the in-plane directions as well. When applying the point-dipole model, we show that resonantly excited samples respond with a strong near-field signal to all linear polarization angles. We then experimentally investigate the polarization-dependent responses for both non-resonant (Au) and phonon-resonant (3C-SiC) sample excitations at a 10.6 µm and 10.7 µm incident wavelength using a tabletop CO2 laser. Varying the illumination polarization angle thus allows one to quantitatively compare the scattered near-field signatures for the two wavelengths. Finally, we compare our experimental data to simulation results and thus gain a fundamental understanding of the polarization’s influence on the near-field interaction. As a result, the near-field components parallel and perpendicular to the sample surface can be easily disentangled and quantified through their polarization signatures, connecting them directly to the sample’s local permittivity. Full article
(This article belongs to the Special Issue Recent Advances and Future Trends in Nanophotonics Ⅱ)
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12 pages, 3403 KiB  
Article
A Two-Channel Silicon Nitride Multimode Interference Coupler with Low Back Reflection
by Jonathan Menahem and Dror Malka
Appl. Sci. 2022, 12(22), 11812; https://doi.org/10.3390/app122211812 - 21 Nov 2022
Cited by 12 | Viewed by 2000
Abstract
Optical communication systems based on silicon (Si) multimode interference (MMI) wavelength-division multiplexing (WDM) technology can suffer from back reflection. This undesirable characteristic causes losses and is a key problem that can lead to performance limitations. To overcome this limitation, we proposed a new [...] Read more.
Optical communication systems based on silicon (Si) multimode interference (MMI) wavelength-division multiplexing (WDM) technology can suffer from back reflection. This undesirable characteristic causes losses and is a key problem that can lead to performance limitations. To overcome this limitation, we proposed a new study on how to divide two wavelengths by understanding the light coupling mechanism of the silicon nitride (SiN) MMI coupler over the C-band window and showed four different options to design a two-channel demultiplexer. The best option for a two-channel SiN MMI coupler with low back reflection losses operating in the C-band spectrum was selected. Based on simulation results, the proposed device can transmit two channels with a spacing of 20 nm between wavelengths in the C-band. Moreover, the device has a low power loss range of 0.895–0.936 dB, large bandwidth of 16.96–18.77 nm, and good crosstalk of 23.5–25.86 dB. Usually, a unique design such as angled MMI is required when using Si MMI technology to reduce the back reflection losses. Due to the use of SiN, which has a low refractive index, we obtained a 40.4 dB back-reflection loss without using this angled MMI design. Therefore, this MMI demultiplexer based on SiN can be used in optical communication systems based on the WDM technique to obtain a high data transfer rate in conjunction with low back-reflection losses. Full article
(This article belongs to the Special Issue Recent Advances and Future Trends in Nanophotonics Ⅱ)
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15 pages, 1546 KiB  
Article
Fluorimetry in the Strong-Coupling Regime: From a Fundamental Perspective to Engineering New Tools for Tracing and Marking Materials and Objects
by Mohamed Hatifi, Dimitrije Mara, Bojana Bokic, Rik Van Deun, Brian Stout, Emmanuel Lassalle, Branko Kolaric and Thomas Durt
Appl. Sci. 2022, 12(18), 9238; https://doi.org/10.3390/app12189238 - 15 Sep 2022
Viewed by 1236
Abstract
Under exceptional circumstances, light and molecules bond together, creating new hybrid light–matter states with far-reaching consequences for these strongly coupled entities. The present article describes the quantum-mechanical foundation of strong-coupling and experimental evidence for molding the radiation properties of nanoprobes by strong-coupling. When [...] Read more.
Under exceptional circumstances, light and molecules bond together, creating new hybrid light–matter states with far-reaching consequences for these strongly coupled entities. The present article describes the quantum-mechanical foundation of strong-coupling and experimental evidence for molding the radiation properties of nanoprobes by strong-coupling. When applied to tracing and marking, the new fluorometry technique proposed here, which harnesses strong-coupling, has a triple advantage compared to its classical counterparts such as DNA tracing. It is fast, and its signal-to-noise ratio can be improved by spectral filtering; moreover, it reveals a specific quantum signature of the strong-coupling, which is extremely difficult to reproduce classically, thereby opening the door to new anti-counterfeiting strategies. Full article
(This article belongs to the Special Issue Recent Advances and Future Trends in Nanophotonics Ⅱ)
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11 pages, 2831 KiB  
Article
Design of Inverted Nano-Cone Arrayed SERS Substrate for Rapid Detection of Pathogens
by Zixun Jia, Sarah Asiri, Asma Elsharif, Widyan Alamoudi, Ebtesam Al-Suhaimi and Sang-Gook Kim
Appl. Sci. 2021, 11(17), 8067; https://doi.org/10.3390/app11178067 - 31 Aug 2021
Cited by 1 | Viewed by 1918
Abstract
Rapid detection of bacteria is a very critical and important part of infectious disease treatment. Sepsis kills more than 25 percent of its victims, resulting in as many as half of all deaths in hospitals before identifying the pathogen for patients to get [...] Read more.
Rapid detection of bacteria is a very critical and important part of infectious disease treatment. Sepsis kills more than 25 percent of its victims, resulting in as many as half of all deaths in hospitals before identifying the pathogen for patients to get the right treatment. Raman spectroscopy is a promising candidate in pathogen diagnosis given its fast and label-free nature, only if the concentration of the pathogen is high enough to provide reasonable sensitivity. This work reports a new design of surface-enhanced Raman spectroscopy (SERS) substrate which will provide high enough sensitivity and fast and close contact of the target structure to the optical hot spots for immunomagnetic capturing-based bacteria-concentrating technique. The substrate uses inverted nanocone structure arrays made of transparent PDMS (Polydimethylsiloxane) to funnel the light from the bottom to the top of the cones where plasmonic gold nanorods are located. A high reflective and low loss layer is deposited on the outer surface of the cone. Given the geometry of cones, photons are multi-reflected by the outer layer and thus the number density of photons at hotspots increases by an order of magnitude, which could be high enough to detect immunomagnetically densified bacteria. Full article
(This article belongs to the Special Issue Recent Advances and Future Trends in Nanophotonics Ⅱ)
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Review

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13 pages, 19402 KiB  
Review
Quantum Information with Integrated Photonics
by Paolo Piergentili, Francesco Amanti, Greta Andrini, Fabrizio Armani, Vittorio Bellani, Vincenzo Bonaiuto, Simone Cammarata, Matteo Campostrini, Samuele Cornia, Thu Ha Dao, Fabio De Matteis, Valeria Demontis, Giovanni Di Giuseppe, Sviatoslav Ditalia Tchernij, Simone Donati, Andrea Fontana, Jacopo Forneris, Roberto Francini, Luca Frontini, Roberto Gunnella, Simone Iadanza, Ali Emre Kaplan, Cosimo Lacava, Valentino Liberali, Francesco Marzioni, Elena Nieto Hernández, Elena Pedreschi, Domenic Prete, Paolo Prosposito, Valentino Rigato, Carlo Roncolato, Francesco Rossella, Andrea Salamon, Matteo Salvato, Fausto Sargeni, Jafar Shojaii, Franco Spinella, Alberto Stabile, Alessandra Toncelli, Gabriella Trucco and Valerio Vitaliadd Show full author list remove Hide full author list
Appl. Sci. 2024, 14(1), 387; https://doi.org/10.3390/app14010387 - 31 Dec 2023
Cited by 1 | Viewed by 1551
Abstract
Since the 1980s, researchers have taken giant steps in understanding how to use quantum mechanics for solving real problems—for example, making a computer that works according to the laws of quantum mechanics. In recent decades, researchers have tried to develop a platform for [...] Read more.
Since the 1980s, researchers have taken giant steps in understanding how to use quantum mechanics for solving real problems—for example, making a computer that works according to the laws of quantum mechanics. In recent decades, researchers have tried to develop a platform for quantum information and computation that can be integrated into digital and telecom technologies without the need of a cryogenic environment. The current status of research in the field of quantum integrated photonics will be reviewed. A review of the most common integrated photonic platforms will be given, together with the main achievements and results in the last decade. Full article
(This article belongs to the Special Issue Recent Advances and Future Trends in Nanophotonics Ⅱ)
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