Abstract
The problem of obtaining broadband superdirective radiation from an electrically small, easy to manufacture antenna is among the most challenging and elusive problems in electromagnetics. Superdirective arrays tend to be narrowband and sensitive to tolerancing, while a single superdirective radiator typically requires a very complicated and difficult to manufacture design. In this Article, we report on a new and transformative discovery, the fact that broadband superdirectivity naturally occurs for a single thin-wire nanoloop of the appropriate material composition and size. Full-wave simulations have revealed end-fire directivity of above 4.0 (6 dBi) for a nanoloop with radius less than 0.2 wavelength. This surprising phenomenon is explained in two ways: by comparison with two-element superdirective arrays and via a spherical multipole decomposition. This finding offers a solution to the problem of the inherently short-range communication of nanodevices and thus had the potential to strongly impact the fields of sensors, electronics, and wireless communications.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 509-516 |
| Number of pages | 8 |
| Journal | ACS Photonics |
| Volume | 4 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 15 2017 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Biotechnology
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering
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Existence of Superdirective Radiation Modes in Thin-Wire Nanoloops. / Pantoja, Mario F.; Nagar, Jogender; Lu, Bingqian; Werner, Douglas Henry.
In: ACS Photonics, Vol. 4, No. 3, 15.03.2017, p. 509-516.Research output: Contribution to journal › Article
TY - JOUR
T1 - Existence of Superdirective Radiation Modes in Thin-Wire Nanoloops
AU - Pantoja, Mario F.
AU - Nagar, Jogender
AU - Lu, Bingqian
AU - Werner, Douglas Henry
PY - 2017/3/15
Y1 - 2017/3/15
N2 - The problem of obtaining broadband superdirective radiation from an electrically small, easy to manufacture antenna is among the most challenging and elusive problems in electromagnetics. Superdirective arrays tend to be narrowband and sensitive to tolerancing, while a single superdirective radiator typically requires a very complicated and difficult to manufacture design. In this Article, we report on a new and transformative discovery, the fact that broadband superdirectivity naturally occurs for a single thin-wire nanoloop of the appropriate material composition and size. Full-wave simulations have revealed end-fire directivity of above 4.0 (6 dBi) for a nanoloop with radius less than 0.2 wavelength. This surprising phenomenon is explained in two ways: by comparison with two-element superdirective arrays and via a spherical multipole decomposition. This finding offers a solution to the problem of the inherently short-range communication of nanodevices and thus had the potential to strongly impact the fields of sensors, electronics, and wireless communications.
AB - The problem of obtaining broadband superdirective radiation from an electrically small, easy to manufacture antenna is among the most challenging and elusive problems in electromagnetics. Superdirective arrays tend to be narrowband and sensitive to tolerancing, while a single superdirective radiator typically requires a very complicated and difficult to manufacture design. In this Article, we report on a new and transformative discovery, the fact that broadband superdirectivity naturally occurs for a single thin-wire nanoloop of the appropriate material composition and size. Full-wave simulations have revealed end-fire directivity of above 4.0 (6 dBi) for a nanoloop with radius less than 0.2 wavelength. This surprising phenomenon is explained in two ways: by comparison with two-element superdirective arrays and via a spherical multipole decomposition. This finding offers a solution to the problem of the inherently short-range communication of nanodevices and thus had the potential to strongly impact the fields of sensors, electronics, and wireless communications.
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U2 - 10.1021/acsphotonics.6b00486
DO - 10.1021/acsphotonics.6b00486
M3 - Article
AN - SCOPUS:85015789254
VL - 4
SP - 509
EP - 516
JO - ACS Photonics
JF - ACS Photonics
SN - 2330-4022
IS - 3
ER -