Radiation pattern direction control in nano-antenna (tunable nano-antenna)

Asl, A. Beheshti; Rostami, Ali; Amiri, Iraj Sadegh

doi:10.1007/s11082-019-2085-4

Cited by 8 publications

(2 citation statements)

References 34 publications

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“…These approaches have led the way for many potentially useful applications in the fields of biomedicine, metrology, and security. Antennas are crucially important components of sub millimeter wave-based devices and systems, and they are used in situations when a transition between a directed wave and a free-space wave is needed [3]. Antennas may be divided into two categories: directional antennas and patch antennas.…”

Section: Introductionmentioning

confidence: 99%

Sub-millimeter wave nanoantenna-a review

Mohan

Indhumathi

2023

J. Phys.: Conf. Ser.

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Electromagnetic waves that have a wavelength of less than one millimeter are referred to as sub millimeter waves. In sub millimeter wave-based devices and systems, antennas are critical components that are vital to their operation. Antennas are used in situations when a transition between a directed wave and a free-space wave is needed. Since, electromagnetic characteristics for receiving and transmission of the nano antenna are mutually invertible, the properties of nano antenna are analyzed in sub millimeter wave frequencies and this overcomes the limitations of conventional antenna design. They are very small in size, provide more efficiency, and do not cause health threat. This paper reviews the applications of nano antenna, which operates at sub-millimeter wave frequency, in the field of energy harvesting, space technology, IoT applications, 5G network, smart clothing, bio sensing, communication, etc? Also, the nano antenna fabricated by 3D printing technology is also reviewed. The world’s ever-increasing energy need necessitates the development of alternate energy sources. There is a lot of research and development going on right now to enhance photovoltaic systems so that they can be more efficient, but the constraint is that they can only collect energy from the visible area of the electromagnetic spectrum. As a result, a novel device known as a Nano antenna has been developed to convert heat energy taken from the infrared spectrum into electricity. In the not-too-distant future, it will have an impact on a wide range of fields, such as mobile communication (5G), radar detection, and higher order frequency applications. Space communication, broadband wireless communications, wireless optical communication, and mobile communication will also benefit from its implementation.

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Section: Introductionmentioning

confidence: 99%

Sub-millimeter wave nanoantenna-a review

Mohan

Indhumathi

2023

J. Phys.: Conf. Ser.

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“…A unique work by Barreda and her colleagues hybridised quantum dots (QD) [41] with metal nanostructure nanoantenna (NA) to increase optical absorption and intensity enhancement of the solar cell [5,42]. Generally, NAs are compiled of sub-wavelength noble metal nanostructures (such as gold) incapable of propagating light and electric current and may maintain localised surface plasmon (LSP) in confining structures [43].…”

Section: Introductionmentioning

confidence: 99%

Computational modelling of light-matter interaction in aSi with CdSe/ZnS core/shell quantum dots and metal nanoantenna for solar cell applications

et al. 2023

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As the world population rises, energy needs are become critical. Using photovoltaic technologies like amorphous silicon solar cells (aSiSC) to harvest solar power might benefit global concern. Previous research claimed that aSiSCs were modest short-wavelength absorbers. Quantum dot (QD) may be applied to the aSiSC to enhance optical absorptions and electric fields as the QD’s bandgap is tunable, which can cover a broader electromagnetic range. This study aims are to design the 3D aSiSC with QD on the model and to investigate the optical absorption peak, electric field profiles, and light-matter interaction of the models via COMSOL Multiphysics software. From the base model, the optical absorption improved from 736 nm at 41.827% to 46.005% at 642 nm for the aSiQDSC model which developed with 0.5/3.0 nm radius of core/shell cadmium selenide/zinc sulphide (CdSe/ZnS). This study proceeded combining rectangular nanosheets gold and silver nanoantenna (Au and Ag NA) with various gap g of NA to the aSiQDSC models where g = 0.5 nm Ag NA model was presented the higher optical absorption of 47.246% at 650 nm, and electric fields of 2.53×1010 V/nm. Computationally, this ultimate design is ecologically sound for solar cell applications, which allow future direction in renewable energy research and fabrication

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