Nano-Photonics Materials and Devices

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

Deadline for manuscript submissions: closed (8 July 2020) | Viewed by 7220

Special Issue Editor


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Guest Editor
Department of Electrical & Computer Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
Interests: integrated photonics; nanophotonics devices; nonlinear optics; optical materials; metamaterials; application-driven nanophotonics
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Special Issue Information

Dear Colleagues,

For centuries, researchers have searched for unique methodologies to control the flow of light and perform useful operations. Building from macroscopic reflective and refractive optics, the advent of advanced nanoscale fabrication techniques has opened new avenues to explore the control of light. Most notably, they have enabled researchers to design the optical space with exceptional flexibility, driving the demonstration of unique properties such as negative refractive indices, deep subwavelength confinement, extremely anisotropic materials, high speed on-chip photonic devices, and ultrathin functional surfaces. Over the last two decades these advances have unlocked many unique and powerful techniques which are now beginning to be explored in the consumer space. Yet, moving these discoveries from the lab to practical implementations incurs an entirely new set of challenges and restrictions such as cost, robustness, versatility, efficiency, etc., which must be overcome for success. To conquer these hurdles, the development of new photonic materials such as highly doped semiconductors, metallic ceramics, and alloyed materials to conquer cost, environmental, and integration challenges as well as unique and robust-filled design methodologies, such as collective optical property engineering, random nanostructure engineering, and fault-tolerant design optimization are critical advances.

This Special Issue looks to explore recent advances in these practical considerations of nanophotonic device and materials development. Researchers are encouraged to submit both review and original research articles on experimental and theoretical works in the broad areas outlined above. Solutions and demonstrations based on novel design, fabrication, characterization and modeling methods to further advance the field are considered.

Dr. Nathaniel Kinsey
Guest Editor

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Keywords

  • Optical materials
  • metamaterials
  • integrated photonics
  • nanophotonics
  • application-driven
  • robust optics

Published Papers (3 papers)

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Research

9 pages, 2680 KiB  
Article
Tunable Plasmonic Talbot Effect Based on Graphene Monolayer
by Huanxi Ma, Shaojian Su, Hengjie Zhou, Zeyang Zhao, Zhili Lin and Weibin Qiu
Appl. Sci. 2020, 10(14), 4782; https://doi.org/10.3390/app10144782 - 12 Jul 2020
Cited by 5 | Viewed by 1936
Abstract
In this article, the plasmonic Talbot effect supported by a graphene monolayer is investigated theoretically when surface plasmon polaritons (SPPs) are excited on the graphene. The Talbot effect distance is studied by varying the chemical potential, wavelength and the period of grating. The [...] Read more.
In this article, the plasmonic Talbot effect supported by a graphene monolayer is investigated theoretically when surface plasmon polaritons (SPPs) are excited on the graphene. The Talbot effect distance is studied by varying the chemical potential, wavelength and the period of grating. The Talbot distance increases with the period in a parabolic way, and exhibits the opposite trends with respect to the chemical potential and wavelength. Moreover, the full width at half maximum (FWHM) of the Talbot image is recorded as a function of chemical potential and the wavelength. This study provides a new approach for sub-wavelength scale imaging and extends the applications of Talbot effect as well as graphene-based plasmonic devices. Full article
(This article belongs to the Special Issue Nano-Photonics Materials and Devices)
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16 pages, 4834 KiB  
Article
A Visible and Near-IR Tunnel Photosensor with a Nanoscale Metal Emitter: The Effect of Matching of Hot Electrons Localization Zones and a Strong Electrostatic Field
by Alexander Yakunin, Nikolay Aban’shin, Garif Akchurin, Yuri Avetisyan, Alexander Loginov, Sergey Yuvchenko, Sergey Zarkov, Sergey Volchkov and Dmitry Zimnyakov
Appl. Sci. 2019, 9(24), 5356; https://doi.org/10.3390/app9245356 - 08 Dec 2019
Cited by 10 | Viewed by 2014
Abstract
The results of the research and design of a novel vacuum photosensor with a planar molybdenum blade structure are presented. The advanced prototype implements the principle of an increasing penetrability of the Schottky barrier for the metal–vacuum interfaces under the action of an [...] Read more.
The results of the research and design of a novel vacuum photosensor with a planar molybdenum blade structure are presented. The advanced prototype implements the principle of an increasing penetrability of the Schottky barrier for the metal–vacuum interfaces under the action of an external strong electrostatic field. Theoretical and experimental substantiation of the photosensor performance in a wide range of wavelengths (from 430 to 680 nm and from 800 to 1064 nm) beyond the threshold of the classical photoelectric effect is given. The finite element method was applied to calculate distribution of the optical and electrostatic fields inside the photosensor structure. The sensor current-to-light response was studied using the periodic pulsed irradiation with the tunable wavelength. It was shown that the nanoscale localization zones of two types are formed near the surface of the blade tip: the zone of an increased concentration of hot electrons localized inside the molybdenum blade, and the zone with an increased strength of the external electrostatic field localized outside the blade. In general, the mutual positions of these zones may not coincide, whereas the position of the first-type localization zone significantly varies with the changes in the wavelength of the irradiating light. This causes features in the spectrum of the quantum yield of the photosensor such as expressed non-monotonic behavior and occurrence of sharp dips. The design of the photosensor that provides matching of the positions for both types of localization zones was proposed; the manufactured prototypes of the designed device were experimentally studied. In the designed photosensor, the ballistic transport of photoelectrons in the vacuum gap with a strong field provides a possibility for the creation of ultra-fast optoelectronic devices, such as modulators, detectors, and generators. Full article
(This article belongs to the Special Issue Nano-Photonics Materials and Devices)
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8 pages, 2261 KiB  
Article
Large Near-Field Enhancement in Terahertz Antennas by Using Hyperbolic Metamaterials with Hole Arrays
by Cong Cheng, Wei Chen, Yuanfu Lu, Fangming Ruan and Guangyuan Li
Appl. Sci. 2019, 9(12), 2524; https://doi.org/10.3390/app9122524 - 20 Jun 2019
Cited by 5 | Viewed by 3032
Abstract
Terahertz antennas can greatly enhance the near fields and enable strong light–matter interactions, and thus have been widely used in applications such as terahertz sensing and detection. Here we propose a novel approach to further enhance the near fields in terahertz antennas. We [...] Read more.
Terahertz antennas can greatly enhance the near fields and enable strong light–matter interactions, and thus have been widely used in applications such as terahertz sensing and detection. Here we propose a novel approach to further enhance the near fields in terahertz antennas. We show that by sandwiching hyperbolic metamaterials that are composed of InSb and SiO 2 multilayer and that are dressed with hole arrays, between a terahertz dipole antenna and the substrate, the near-field electric field intensities in the antenna can be further enhanced by more than three times. Simulations reveal that this enhancement originates from the doubly enhanced in-plane electric field component and the significantly enhanced out-of-plane electric field component. We expect this work will advance the design of terahertz antennas that are widely used in sensors and detectors. Full article
(This article belongs to the Special Issue Nano-Photonics Materials and Devices)
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