Field Computations of Optical Antennas

Kappeler, Roman; Erni, Daniel; Cui, Xudong; Novotny, Lukas

doi:10.1166/jctn.2007.033

Cited by 43 publications

(36 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…͑4͒ was confirmed for gold nanoparticles chain with different particle sizes at a fixed spacing d = 1 nm. 23 To explain why the particle number effect was only theoretically observed for gold nanoparticles chain but not for silver nanoparticle chain, we have paid our attention to the different damping behaviors of gold and silver in the investigated spectral range. As the particle size increases, peak enhancement ͉E͉ max always drops.…”

Section: Resultsmentioning

confidence: 99%

The influences of particle number on hot spots in strongly coupled metal nanoparticles chain

Wang¹,

Lukyanchuk²,

Guo³

et al. 2008

The Journal of Chemical Physics

113

View full text Add to dashboard Cite

In understanding of the hot spot phenomenon in single-molecule surface enhanced Raman scattering (SM-SERS), the electromagnetic field within the gaps of dimers (i.e., two particle systems) has attracted much interest as it provides significant field amplification over single isolated nanoparticles. In addition to the existing understanding of the dimer systems, we show in this paper that field enhancement within the gaps of a particle chain could maximize at a particle number N>2, due to the near-field coupled plasmon resonance of the chain. This particle number effect was theoretically observed for the gold (Au) nanoparticles chain but not for the silver (Ag) chain. We attribute the reason to the different behaviors of the dissipative damping of gold and silver in the visible wavelength range. The reported effect can be utilized to design effective gold substrate for SM-SERS applications.

show abstract

Section: Resultsmentioning

confidence: 99%

The influences of particle number on hot spots in strongly coupled metal nanoparticles chain

Wang¹,

Lukyanchuk²,

Guo³

et al. 2008

The Journal of Chemical Physics

113

View full text Add to dashboard Cite

show abstract

“…In [15], the absorption of infrared radiation in a nanotube is experimentally demonstrated. Finally, CNTs have been recently proposed as potential optical antennas operating in the Terahertz Band (0.1-10.0 THz) [16], [17]. In light of these results, we advocate for graphene-based EM nanonetworks in the Terahertz Band.…”

mentioning

confidence: 88%

Channel Modeling and Capacity Analysis for Electromagnetic Wireless Nanonetworks in the Terahertz Band

Jornet

Akyildiz

2011

IEEE Trans. Wireless Commun.

938

765

View full text Add to dashboard Cite

Abstract-Nanotechnologies promise new solutions for several applications in the biomedical, industrial and military fields. At the nanoscale, a nanomachine is considered as the most basic functional unit which is able to perform very simple tasks. Communication among nanomachines will allow them to accomplish more complex functions in a distributed manner. In this paper, the state of the art in molecular electronics is reviewed to motivate the study of the Terahertz Band (0.1-10.0 THz) for electromagnetic (EM) communication among nanodevices. A new propagation model for EM communications in the Terahertz Band is developed based on radiative transfer theory and in light of molecular absorption. This model accounts for the total path loss and the molecular absorption noise that a wave in the Terahertz Band suffers when propagating over very short distances. Finally, the channel capacity of the Terahertz Band is investigated by using this model for different power allocation schemes, including a scheme based on the transmission of femtosecond-long pulses. The results show that for very short transmission distances, in the order of several tens of millimeters, the Terahertz channel supports very large bit-rates, up to few terabits per second, which enables a radically different communication paradigm for nanonetworks.

show abstract

“…In addition, several ongoing projects are conducting research on optical nano-antennas. An optical nano-antenna is a device which is able to emit energy to the free-space from a confined region with a size in the order of the wavelength of the light [42]. The discovery of nanotubes enabled the development of resonant structures with a size in the order of the light wavelength and triggered the development of this new field [44].…”

Section: Nano-antennasmentioning

confidence: 99%