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oe1(光电查) - 科学论文

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  • Broken poloidal symmetry and plasmonic eigenmodes on a torus

    摘要： We study the poloidal modes (modes whose variations are strictly along the direction of the torus axis) of toroidal nanoparticles. We show that the modes may be understood in terms of the symmetry breaking that occurs when an infinite cylinder is folded to form a torus. This symmetry breaking results in the splitting of the transverse cylinder modes into two distinct sets of modes on a torus. One set of these modes was known to exist already. We show the existence of the second set and also analytically derive the surface charge structure for that set of modes. We also consolidate recent advances made in studying the modal structure on torus particles and complete our understanding of the plasmonic modes of a torus.

    关键词： poloidal modes,toroidal nanoparticles,symmetry breaking,plasmonic modes

    更新于2025-09-23 15:21:01

  • European Microscopy Congress 2016: Proceedings || Tailoring the wave function of electron probes for the selective detection of plasmonic modes

    摘要： The wave function of electron beams for the self-detection of plasmonic modes.

    关键词： wave function,self-detection,electron beams,plasmonic modes

    更新于2025-09-16 10:30:52

  • European Microscopy Congress 2016: Proceedings || Investigation of Plasmonic Modes of Gold Tapers by EELS

    摘要： Plasmonic modes of gold rods of gold tapes by IIM

    关键词： gold rods,IIM,Plasmonic modes,gold tapes

    更新于2025-09-11 14:15:04

  • Low loss photonic nanocavity via dark magnetic dipole resonant mode near metal

    摘要： The dielectric-semiconductor-dielectric-metal 4 layered structure is a well-established configuration to support TM hybrid plasmonic modes, which have demonstrated significant advantages over pure photonic modes in structures without metal to achieve low loss resonant cavities at sub-diffraction limited volumes. The photonic modes with TE characteristics supported by the same 4 layered structure, on the other hand, are less studied. Here we show that a low loss photonic mode with TE01 characteristics exists in the dielectric-semiconductor-dielectric-metal 4 layered structure if a truncated cylindrical disk is chosen as the semiconductor core. This mode exhibits the lowest cavity loss among all resonant modes, including both pure photonic and hybrid plasmonic modes, at cavity radius <150 nm and within the wavelength range 620 nm to 685 nm, with a footprint ~0.83 (λ/2neff)2, physical size ~0.47 (λ/2neff)3 and a mode volume down to 0.3 (λ/2neff)3. The low cavity loss of this TE01 mode is attributed to its substantially reduced radiation loss to the far field by the creation of image charges through the metal response. Because of the low mode penetration in the metal, this photonic mode show equally low cavity loss near industry relevant metals such as Cu. Our study demonstrates an alternative to hybrid plamonic modes and metallo-dielectric modes to achieve low loss cavities with extremely small footprints.

    关键词： dark magnetic dipole resonant mode,TE01 mode,low loss,photonic nanocavity,hybrid plasmonic modes

    更新于2025-09-10 09:29:36