Influence of order-to-disorder transitions on the optical properties of the aluminum plasmonic metasurface

Abstract

To mimic the optical influence of disorder in condensed matter, the effect of uniform disorder on the plasmonic resonances in the near ultraviolet and visible region are investigated numerically and...

Low-Cost, High-Gain MoS2 FETs from Amorphous Low-Mobility Film Precursors

“…The long-range amorphicity of the films is confirmed by X-ray diffraction (XRD) and Raman spectroscopy (Figure ), as well as from ultraviolet–visible (UV–vis) absorbance (see Figure S1 in the Supporting Information). The latter indicates the absence of the excitonic A and B bands at 670 and 610 nm, respectively, which constitute the typical fingerprint of ordered 2H-MoS 2 structures, showing only transitions from the valence to the conduction band around 400 nm that, additionally, appear broad due to an extended structural disorder . From SE measurements’ analysis, the as-grown material band gap is estimated to be 1.27 eV, with no characteristic peaks or features in their spectral refractive indices (Figure a), suggesting a bulk-like, amorphous material with an indirect gap.…”

Shaping the Color and Angular Appearance of Plasmonic Metasurfaces with Tailored Disorder

“…This relatively simple calculation approach can thus be widely applied in future investigations of disordered nanoplasmonic systems with other types of disorder, such as size disorder 20 or orientational disorder, 60 or combinations of different disorder types. 53 Another highly interesting prospect for the application of disordered plasmonic systems is the use of tailored disorder to engineer a desired far-field response via inverse design algorithms, 27 for which the comparably short calculation times due to the applied approximations are of great advantage. This holds potential use in the design and fabrication of nanoparticle coatings to generate desired appearances of surfaces, but also for the design of beamsteering devices and flat metalenses.…”

“…We have furthermore verified these observations using a calculation approach based on dipole–dipole interaction, which shows very good agreement with the measurement results. This relatively simple calculation approach can thus be widely applied in future investigations of disordered nanoplasmonic systems with other types of disorder, such as size disorder or orientational disorder, or combinations of different disorder types . Another highly interesting prospect for the application of disordered plasmonic systems is the use of tailored disorder to engineer a desired far-field response via inverse design algorithms, for which the comparably short calculation times due to the applied approximations are of great advantage.…”

“…This requires a disorder model that allows for a tunable degree of disorder in reproducible disordered arrays. We make use of the model employed in nanowire-based photonic crystals by Nau et al . , In this model, which is comparable to the method used by Zhang et al ., particles are randomly displaced from their initial lattice positions, with a maximum displacement defined as the disorder strength . This configuration is also called “frozen-phonon”-type disorder or uncorrelated disorder, since the elements do not influence each other.…”

Photoluminescence coupled to electric and magnetic surface lattice resonance in periodic arrays of zirconia nanoparticles

“…Surface lattice resonance (SLR) is a state in which periodically aligned polarizations resonate by coupling to their own scattering fields through in-plane diffraction. [1][2][3][4][5][6][7] The features of the SLR include high quality factor (Q) and tunability of the resonant frequency by the array periodicity. The experimental scattering element constituting the SLR is the electric or magnetic polarization in nanoparticles.…”