Ullah, KaleemGarcía Cámara, BraulioHabib, MuhammadLiu, XuefengKrasnok, AlexLepeshov, SergeyHao, JingjingLiu, JuanYadav, Nagendra Prasad2022-08-292022-08-292018-03-01Journal of Quantitative Spectroscopy and Radiative Transfer, (2018), v. 208, pp.: 71-77.0022-4073https://hdl.handle.net/10016/35608Chirality is a property of certain molecules, materials or artificial nanostructures, which enables them to interact with the spin angular momentum of an incident light. This provides a different optical response, depending on the incident polarization, which gives rise to chiral optical spectroscopies. However, low detection limits require an enhanced chiral light-matter interaction. Here, we propose a novel type of resonant chiral optical nanoantenna based on high-index dielectric (Cu2O) spherical nanoparticles arranged in a trimer geometry. We demonstrate both numerically and experimentally that this trimer nanoantenna exhibits resonantly enhanced optical dichroism and light hotspots, which are associated with this geometry. Moreover, we apply near-field optical microscopy to measure the near-field peculiarities of the proposed nanoantenna. The ability of changing the nanoantenna near field scattering by varying the light polarization is shown.6eng© 2018 Elsevier Ltd. All rights reserved.Atribución-NoComercial-SinDerivadas 3.0 EspañaDielectric metasurfacesResonant chiral optical nanoantennaChiralityresearch articleÓpticahttps://doi.org/10.1016/j.jqsrt.2018.01.015open access7177JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER208AR/0000021184