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Fractal diabolo antenna for enhancing and confining the optical magnetic field

2014; American Institute of Physics; Volume: 4; Issue: 1 Linguagem: Inglês

10.1063/1.4863093

2158-3226

Yong Yang, Haitao Dai, Xiao Wei Sun,

Orbital Angular Momentum in Optics

We introduce fractal geometry to diabolo nanoantenna for higher magnetic field intensity enhancement, i.e. the Sierpiński triangle diabolo antenna (STDA). Numerical results show that higher iteration of the STDA is responsible for the higher enhancement and the red shift of the resonant wavelength. Further investigation demonstrates the enhancement can be improved by increasing the length of the antenna or its central strip. By designing diabolo antennas with fractal geometry, improving the magnetic field intensity enhancement and varying the resonance conditions can be achieved while keeping the constant antenna dimensions.