Terahertz Plasmonic Cross Resonant Antenna

Gao, Zhen; Wang, Z.-Y.

doi:10.1163/156939311797164954

Cited by 7 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the applications mentioned before different multiresonant nanoantenna geometries have been used. These include gap dipole antennas with different arm lengths, , log-periodic structures, ,, L-shaped nanostructures in different arrangements, ,, asymmetric bowtie antennas, , single T-shaped antennas, ,,− bimetal antennas, a V-shaped antenna coupled with a nanorod, and cross-shaped optical gap antennas. − ,,,− ,− …”

mentioning

confidence: 99%

Coupled T-Shaped Optical Antennas with Two Resonances Localized in a Common Nanogap

et al. 2015

View full text Add to dashboard Cite

Resonant optical antennas with nanoscale gaps are of high interest due to their ability to enhance electric fields in localized subdiffraction-limited volumes. They are especially attractive for coupling with quantum emitters. One challenge for applications that exhibit a spectral shift is to fabricate nanoantennas that provide two distinct resonances at the excitation and emission frequency, respectively. We propose a coupled T-shaped nanoantenna structure that provides independently controllable resonances with a common electromagnetic hot spot in the antenna gap. We demonstrate the fabrication of such structures and investigate experimentally and theoretically their spatial, time-integrated spectral- and polarization-dependent electromagnetic field properties. The nanoantennas exhibit two resonances with unique spectral and polarization responses. The resonance wavelengths are independently tailored by varying the geometry of individual T-shaped antennas.

show abstract

mentioning

confidence: 99%

Coupled T-Shaped Optical Antennas with Two Resonances Localized in a Common Nanogap

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Examples go far beyond multiresonant antennas 41 or polarization dependent tailored optical behavior. 42,43 For instance nanoantennas for optimized nonlinear optical effects are particularly promising with respect to inverse design methods. For the maximization of optical second harmonic generation for instance, 44,45 strong resonances could be concurrently designed at the fundamental and harmonic frequencies and furthermore tailored to yield strongest field-enhancements just at the surface of the nanoparticle.…”

Section: Resultsmentioning

confidence: 99%

Multi-resonant silicon nanoantennas by evolutionary multi-objective optimization

Wiecha

Arbouet

Girard

et al. 2018

Computational Optics II

View full text Add to dashboard Cite

Photonic nanostructures have attracted a tremendous amount of attention in the recent past. Via their size, shape and material it is possible to engineer their optical response to user-defined needs. Tailoring of the optical response is usually based on a reference geometry for which subsequent variations to the initial design are applied. Such approach, however, might fail if optimum nanostructures for complex optical responses are searched. As example we can mention the case of complex structures with several simultaneous optical resonances. We propose an approach to tackle the problem in the inverse way: In a first step we define the desired optical response as function of the nanostructure geometry. This response is numerically evaluated using the Green Dyadic Method for fully retarded electro-dynamical simulations. Eventually, we optimize multiple of such objective functions concurrently, using an evolutionary multi-objective optimization algorithm, which is coupled to the electro-dynamical simulations code. A great advantage of this optimization technique is, that it allows the implicit and automatic consideration of technological limitations like the electron beam lithography resolution. Explicitly, we optimize silicon nanostructures such that they provide two user-defined resonance wavelengths, which can be individually addressed by crossed incident polarizations.

show abstract

“…Although various components have been developed for THz applications [5][6][7][8][9][10][11][12][13][14][15][16][17][18], high power, low cost, and compact THz sources are not readily available [19]. With the rapid advancement of multi-physics based codes, which provide the possibility of simulating the nonlinear beam-wave interaction dynamics [20][21][22][23][24], extending the operating frequency of the existing microwave tube designs [25][26][27][28][29] has become a promising approach for developing compact and powerful THz sources [30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

Esfahani¹,

Tayarani²,

Schunemann³

2013

PIER

View full text Add to dashboard Cite

Abstract-This paper discusses design procedure and 3-D numerical simulation of a 140 GHz spatial-harmonic magnetron (SHM). The well known scaling laws and an approximate approach based on single harmonic analysis are used to determine the interaction space dimensions and the optimum geometrical parameters of the side resonators. Numerical simulations of the SHM were performed using CST-Particle Studio. Since the simulations are not based on artificial RF priming or assuming restrictive assumptions on the mode of operation or on the number of harmonics to be considered, electromagnetic oscillations grow naturally from noise. The presented SHM shows stable operation in the π/2 − 1-mode at 140 GHz over a range of DC anode voltages extending from 11.3 kV to 11.5 kV and for an axial magnetic flux density equal to 0.79 T. Output power of the SHM varies from 2 kW to 11 kW over these voltages with a maximum efficiency of about 6.8%.

show abstract

Terahertz Plasmonic Cross Resonant Antenna

Cited by 7 publications

References 31 publications

Coupled T-Shaped Optical Antennas with Two Resonances Localized in a Common Nanogap

Coupled T-Shaped Optical Antennas with Two Resonances Localized in a Common Nanogap

Multi-resonant silicon nanoantennas by evolutionary multi-objective optimization

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

Contact Info

Product

Resources

About