Zobrazeno 1 - 10
of 2 251
pro vyhledávání: '"Mortensen, N"'
Cathodoluminescence (CL) microscopy has emerged as a powerful tool for investigating the optical properties of materials at the nanoscale, offering unique insights into the behavior of photonic and plasmonic materials under electron excitation. We in
Externí odkaz:
http://arxiv.org/abs/2411.08738
Autor:
Nørgaard, Martin, Yezekyan, Torgom, Rolfs, Stefan, Frydendahl, Christian, Mortensen, N. Asger, Zenin, Vladimir A.
Common techniques for measuring refractive indices, such as ellipsometry and goniometry, are ineffective for van der Waals crystal flakes because of their high anisotropy and small, micron-scale, lateral size. To address this, we employ near-field op
Externí odkaz:
http://arxiv.org/abs/2411.07926
We investigate how the near-field enhancement of self-similar nanolenses, made of three plasmonic nanospheres with decreasing sizes and separations, is affected by quantum corrections in the optical response of the metal, and by fabrication imperfect
Externí odkaz:
http://arxiv.org/abs/2410.21871
Publikováno v:
Journal of Optics 26, 125001 (2024)
In this paper we study the topology of the bands of a plasmonic crystal composed of graphene and of a metallic grating. Firstly, we derive a Kronig-Penney type of equation for the plasmonic bands as function of the Bloch wavevector and discuss the pr
Externí odkaz:
http://arxiv.org/abs/2404.19576
Autor:
Jang, Minsoo, Menabde, Sergey G., Kiani, Fatemeh, Heiden, Jacob T., Zenin, Vladimir A., Mortensen, N. Asger, Tagliabue, Giulia, Jang, Min Seok
Publikováno v:
Phys. Rev. Applied 22, 014076 (2024)
Scattering-type scanning near-field optical microscope (s-SNOM) has become an essential tool to study polaritons - quasiparticles of light coupled to collective charge oscillations - via direct probing of their near field with a spatial resolution fa
Externí odkaz:
http://arxiv.org/abs/2402.17225
Publikováno v:
ACS Photonics 11, 2379 (2024)
Surface plasmon polaritons (SPPs) carry transverse optical spin within the evanescent field, which has enabled the demonstration of various chiral light-matter interactions in classical and quantum systems. To achieve high spin selectivity in the int
Externí odkaz:
http://arxiv.org/abs/2402.08728
Publikováno v:
ACS Photonics 11, 2368 (2024)
We demonstrate the existence of previously unreported magnetic modes with record-high magnetic Purcell factors in topological-insulator nanospheres. Focusing on bismuth selenide (Bi$_{2}$Se$_{3}$), and based on full electromagnetic Mie theory, we fin
Externí odkaz:
http://arxiv.org/abs/2312.04958
Publikováno v:
ACS Nano 18, 20751 (2024)
We show that hexagonal boron nitride (hBN), a two-dimensional insulator, when subjected to an external superlattice potential forms a new paradigm for electrostatically tunable excitons in the near- and mid-ultraviolet (UV). The imposed potential has
Externí odkaz:
http://arxiv.org/abs/2312.01913
Publikováno v:
Nanophotonics 13, 2513 (2024)
We discuss the possibility of self-hybridisation in high-index dielectric nanoparticles, where Mie modes of electric or magnetic type can couple to the interband transitions of the material, leading to spectral anticrossings. Starting with an idealis
Externí odkaz:
http://arxiv.org/abs/2311.05994
Autor:
Menabde, Sergey G., Heiden, Jacob T., Zenin, Vladimir A., Mortensen, N. Asger, Jang, Min Seok
Publikováno v:
Advanced Optical Materials 12, 2302797 (2024)
Topological insulators generally have dielectric bulk and conductive surface states. Consequently, some of these materials have been shown to support polaritonic modes at visible and THz frequencies. At the same time, the optical properties of topolo
Externí odkaz:
http://arxiv.org/abs/2311.02841