scholarly journals A Sensor Based on Nanoantennas

2020 ◽  
Vol 10 (19) ◽  
pp. 6837
Author(s):  
Ricardo A. Marques Lameirinhas ◽  
João Paulo N. Torres ◽  
António Baptista

At the end of the XX century, a new phenomenon was discovered by Ebbesen, the extraordinary optical transmission. He reported that metallic arrays composed of nano holes, also called nanoantennas, can support resonant optical transmissions responsible by the amplification and concentration of electromagnetic radiation. Classical diffraction theories do not predict this extraordinary phenomenon. This article shows the timeline of theories that try to model the interaction between light and metal planes with slits, holes, grooves or apertures. The comparison between theories is done. Furthermore, as the optical response of these nanoantennas is dependent on the complex dielectric function, there is a high probability of successfully using these structures as sensors. This article aimed to verify how the structure parameters (periodicity, hole diameter, nanoantenna thickness and substrate thickness) can influence the optical response in order to tune the spectrum. Using a Finite Element Tool, several 3D simulations aim to conclude about the parameters influence on air–gold–quartz and air–aluminum–quartz structures, being the nanoantenna made with gold and aluminum. Moreover, all the simulations allow us to verify a resonant spectral response and the existence of great values of amplification near the metal surface. This is a clear evidence of a energy exchange due to the generation and propagation of surface plasmon polaritons. Based on the spectra taken from the parameter analysis, a specific structure was chosen to test two different sensors. A temperature sensor and a tissue detection sensor were tested and the simulations are presented. It is concluded that a nanostructure based on a nanoantenna can be used as a sensor for several applications.

2007 ◽  
Vol 90 (25) ◽  
pp. 251112 ◽  
Author(s):  
Tao Li ◽  
Jia-Qi Li ◽  
Fu-Ming Wang ◽  
Qian-Jin Wang ◽  
Hui Liu ◽  
...  

2019 ◽  
Vol 8 (5) ◽  
pp. 23-28
Author(s):  
G. M. Marega ◽  
E. Marega ◽  
B.-H. V. Borges ◽  
A. F. Da Mota

This paper presents a theoretical and experimental study of the effect of ballistic electrons on the optical response of MIM (Metal-Insulator-Metal) like hyperbolic metamaterial structures. The simulated model using standard parameters and the experimental optical transmission show a 20% peak difference due to the presence of ballistic transport in the metal. A semi-analytic approximation based on the Drude's model is used for accurately predicting the optical response of the hyperbolic substrate and plasmon damping in the fabricated metasurfaces.


2013 ◽  
Vol 30 (4) ◽  
pp. 909 ◽  
Author(s):  
Oleg L. Berman ◽  
Yurii E. Lozovik ◽  
Anton A. Kolesnikov ◽  
Maria V. Bogdanova ◽  
Rob D. Coalson

Nanophotonics ◽  
2014 ◽  
Vol 3 (1-2) ◽  
pp. 33-49 ◽  
Author(s):  
Fan Ye ◽  
Juan M. Merlo ◽  
Michael J. Burns ◽  
Michael J. Naughton

AbstractPlasmonics is a rapidly expanding field, founded in physics but now with a growing number of applications in biology (biosensing), nanophotonics, photovoltaics, optical engineering and advanced information technology. Appearing as charge density oscillations along a metal surface, excited by electromagnetic radiation (e.g., light), plasmons can propagate as surface plasmon polaritons, or can be confined as standing waves along an appropriately-prepared surface. Here, we review the latter manifestation, both their origins and the manners in which they are detected, the latter dominated by near field scanning optical microscopy (NSOM/SNOM). We include discussion of the “plasmonic halo” effect recently observed by the authors, wherein cavity-confined plasmons are able to modulate optical transmission through step-gap nanostructures, yielding a novel form of color (wavelength) selection.


2008 ◽  
Vol 22 (29) ◽  
pp. 2821-2829 ◽  
Author(s):  
JUAN LIU ◽  
BIN HU ◽  
JING-HUI XIE ◽  
YONG-TIAN WANG

The extraordinary optical transmission (EOT) and diffraction through nanoslit composed of two finite-width metallic films with periodic or aperiodic sub-wavelength corrugation were studied. The transmitted spectra were calculated and compared, and the numerical results showed that two transmission peaks exist for the periodic corrugation, while for aperiodic one the transmission peaks are split into seven, corresponding to their different periods and couplings. Further investigation indicated that resonant wavelength of Surface Plasmon Polaritons (SPPs) determined by the nanoslit can be distinguished. It is expected that this investigation will provide useful information for further designing various nano-scaled optical filters and wavelength division multiplexer (WDM) in the next all optical network (AON).


2009 ◽  
Vol 18 (04) ◽  
pp. 633-640
Author(s):  
ANNA MUSTONEN ◽  
HARRI LIPSANEN

We present a study of optical transmission through metal-coated non-close-packed colloidal crystals. The arrays combine semi-shell particles and circular holes simultaneously. We show that the optical response of the structures can be tuned by altering the size of the semi-shell particles and holes. The non-close-packed colloidal crystals were fabricated using modified nanosphere lithography and reactive ion etching.


2017 ◽  
Vol 49 ◽  
pp. 127-148 ◽  
Author(s):  
Japheth Z.J. Lau ◽  
Basil T. Wong

This paper seeks to use numerical simulation to study the effect of indium tin oxide-based emitters on the optical response and performance of nanogap thermophotovoltaic systems using a one-dimensional multi-layered model that incorporates fluctuational electrodynamics to solve the heat transfer problem. It is proposed that ITO be used as a selective emitter whose surface plasmon-polariton-enhanced heat flux spectrum is tuned by changing its processing method. In order to study the optical response of this system, an ITO layer is paired with three types of substrate materials to form three different two-layered emitters at 1000 K. It is discovered that an Ag/ITO emitter produces relatively high heat flux within a narrow spectrum as compared to the other two. It is shown that a substrate material possessing a dielectric function with low ε’ and ε” values (low absorption) contributes the least amount of heat flux and maximizes the contribution of the ITO layer at the resonant frequency producing a narrower spectral heat flux profile. Furthermore the substrate thickness has a significant effect on the heat flux spectrum especially at lower thicknesses. Finally, it is shown that by tuning ITO properties to better match the TPV cell’s band gap, higher power output and conversion efficiencies can be obtained.


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