Radiated and guided optical waves of a magnetic dipole-nanofiber system

Abstract

Nanophotonics–photonic structures with subwavelength features–allow accessing high intensity and localized electromagnetic field and hence is an ideal platform for investigating and exploiting strong lightmatter interaction. In particular, such a strong light-matter interaction requires investigating the interaction of a magnetic dipole with the electromagnetic field– a less-explored topic, which has usually been ignored within the framework of electric dipole approximation. Motivated by recent advances in the emerging field of multipolar nanophotonics, here we develop an analytical model that provides a new insight into analyzing a magnetic dipole and a nanofiber. This method enables us to examine the effect of second term in the multipolar expansion of light-matter interaction, magnetic dipole approximation , with individual guided and radiation modes of the nanofiber. This is a critical key in developing nanophotonic integrated devices based on magnetic nature of light for super-imaging, biosensing, and optical computing.

Perspective on Nanofiber Electrochemical Sensors: Design of Relative Selectivity Experiments

“…Electrospun nanofiber polymers such as polyaniline (PANI) can be less expensive than traditional catalytic nanomaterials [8][9][10][11][12]. Nanofibers have been investigated for use in a wide range of fields, including biomedical hydrogels, textiles, photovoltaics, pharmaceutics, water treatment, catalysis, optical computing, and sensors [13][14][15][16][17][18][19]. This review will focus on the use of nanofibers in sensing applications.…”

Realization of a Single-Layer Terahertz Magnetic Mirror

“…As a result, subwavelength high index dielectric elements, which also exhibit resonances, have been exploited for developing metasurfaces. The resonances in dielectric elements are due to excitation of Mie-resonance [16], [23]- [25] or Whispering Gallery Mode (WGM) [26]- [30] resonances. In general, the dielectric elements used for metasurface are either three-dimensional [4], [6], [7], [11], [23], [24], [31]- [35] or two-dimensional [9], [16], [25], [36]- [38] elements.…”

“…dielectric electric-or magnetic-mirror characteristics, near-unity transmission or reflection, and wide transmission window due to overlap of resonances. The concept of the structure is based on our previous work, where we demonstrated that Mie or WGM resonances can be excited in a sub-wavelength fiber with a relatively medium refractive index using point source excitation, leading to an enhanced magnetic response in THz frequency range [26]- [28], [48]. It should be noted that in this work we concentrate on frequency range (0.1 − 0.6 THz) where the structure is operating in metasurface [49], [50] and not grating [51], [52] regime.…”