Reversible Thermal Tuning of All‐Dielectric Metasurfaces
Mohsen Rahmani,Lei Xu,Lei Xu,Andrey E. Miroshnichenko,Andrei Komar,Rocio Camacho-Morales,Haitao Chen,Yair Zárate,Sergey Kruk,Guoquan Zhang,Dragomir N. Neshev,Yuri S. Kivshar +11 more
Reads0
Chats0
TLDR
In this article, an all-dielectric metasurface with sharp resonances by achieving interference between magnetic dipole and electric quadrupole modes of constituted nanoparticles arranged in a 2D lattice is shown.Abstract:
All-dielectric metasurfaces provide a powerful platform for a new generation of flat optical devices, in particular, for applications in telecommunication systems, due to their low losses and high transparency in the infrared. However, active and reversible tuning of such metasurfaces remains a challenge. This study experimentally demonstrates and theoretically justifies a novel scenario of the dynamical reversible tuning of all-dielectric metasurfaces based on the temperature-dependent change of the refractive index of silicon. How to design an all-dielectric metasurface with sharp resonances by achieving interference between magnetic dipole and electric quadrupole modes of constituted nanoparticles arranged in a 2D lattice is shown. Thermal tuning of these resonances can cause drastic but reciprocal changes in the directional scattering of the metasurface in a spectral window of 75 nm. This change can result in a 50-fold enhancement of the radiation directionality. This type of reversible tuning can play a significant role in novel flat optical devices including the metalenses and metaholograms.read more
Citations
More filters
Journal ArticleDOI
Dynamic Beam Switching by Liquid Crystal Tunable Dielectric Metasurfaces
Andrei Komar,Ramón Paniagua-Domínguez,Andrey E. Miroshnichenko,Ye Feng Yu,Yuri S. Kivshar,Arseniy I. Kuznetsov,Dragomir N. Neshev +6 more
TL;DR: In this article, the authors demonstrate the dynamic switching of beam deflection by a silicon-nanodisk dielectric metasurface infiltrated with liquid crystals, and show the switching of a laser beam from 0° to a 12° angle with an efficiency of 50% by heating the metasuran surface to modify the liquid crystal state from nematic to isotropic.
Journal ArticleDOI
Active metamaterials and metadevices: a review
Journal ArticleDOI
Electrically reconfigurable non-volatile metasurface using low-loss optical phase-change material.
Yifei Zhang,Clayton Fowler,Junhao Liang,Bilal Azhar,Mikhail Y. Shalaginov,Skylar Deckoff-Jones,Sensong An,Jeffrey B. Chou,Christopher Roberts,Vladimir Liberman,Myungkoo Kang,Carlos Ríos,Kathleen Richardson,Clara Rivero-Baleine,Tian Gu,Hualiang Zhang,Juejun Hu +16 more
TL;DR: In this paper, a large-scale, electrically reconfigurable non-volatile active metasurface platform based on optical phase change materials (PCMs) is presented.
Journal ArticleDOI
Electrically Reconfigurable Nonvolatile Metasurface Using Low-Loss Optical Phase Change Material
Yifei Zhang,Clayton Fowler,Junhao Liang,Bilal Azhar,Mikhail Y. Shalaginov,Skylar Deckoff-Jones,Sensong An,Jeffrey B. Chou,Christopher Roberts,Vladimir Liberman,Myungkoo Kang,Carlos Ríos,Kathleen Richardson,Clara Rivero-Baleine,Tian Gu,Hualiang Zhang,Juejun Hu +16 more
TL;DR: A large-scale, electrically reconfigurable non-volatile metasurface platform based on optical PCMs that shows half an octave spectral tuning and promising performances for optical beam steering applications is reported.
Journal ArticleDOI
Active control of anapole states by structuring the phase-change alloy Ge2Sb2Te5.
TL;DR: It is demonstrated that the structured phase-change alloy Ge2Sb2Te5 (GST) can support a diverse set of multipolar Mie resonances with active tunability and provides a new direction for realizing active nanophotonic devices.
References
More filters
Book
Absorption and Scattering of Light by Small Particles
TL;DR: In this paper, a Potpourri of Particles is used to describe surface modes in small Particles and the Angular Dependence of Scattering is shown to be a function of the size of the particles.
Journal ArticleDOI
Flat Optics With Designer Metasurfaces
Nanfang Yu,Federico Capasso +1 more
TL;DR: This Review focuses on recent developments on flat, ultrathin optical components dubbed 'metasurfaces' that produce abrupt changes over the scale of the free-space wavelength in the phase, amplitude and/or polarization of a light beam.
Journal ArticleDOI
Temperature dependence of the energy gap in semiconductors
TL;DR: In this article, a relation for the variation of the energy gap (E g ) with temperature (T ) in semiconductors is proposed. And the equation satisfactorily represents the experimental data for diamond, Si, Ge, 6H-SiC, GaAs, InP and InAs.
Book
Principles of nano-optics
Lukas Novotny,Bert Hecht +1 more
TL;DR: In this paper, the authors proposed a method for propagating and focusing of optical fields in a nano-optics environment using near-field optical probes and probe-sample distance control.