TY - JOUR
T1 - Active control of dielectric singularities in indium-tin-oxides hyperbolic metamaterials
AU - Pianelli, Alessandro
AU - Caligiuri, Vincenzo
AU - Dudek, Michał
AU - Kowerdziej, Rafał
AU - Chodorow, Urszula
AU - Sielezin, Karol
AU - De Luca, Antonio
AU - Caputo, Roberto
AU - Parka, Janusz
N1 - Funding Information:
All the authors want to thank the M.Sc. Ilario Bisignano for the equi-frequency contour figures design, Dr. P. Morawiak for delivering several ITO slabs. The research was supported by the National Center for Research and Development within the grant TECHMATSTRATEG1/347012/3/NCBR/2017. V.C., A.D.L. acknowledges the Project TEHRIS, which is part of ATTRACT, funding from the European Union’s Horizon 2020 research and innovation Programme under grant agreement No.777222. A.P., R.C., J.P., acknowledges Polish National Agency for Academic Exchange (NAWA) and the Instituto Polacco di Roma in the framework of exchange programme for students and scientists as part of bilateral cooperation Italy-Poland 2021–2022 granted by NO. BPN/FRC/2021/1/00008/U/01. A.P. acknowledges the European Social under the “Operational Programme knowledge Education Development 2014-2020”. Project supported with the MUT University Grant UGB 22 793 from funds for year 2022.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022
Y1 - 2022
N2 - Dielectric singularities (DSs) constitute one of the most exotic features occurring in the effective permittivity of artificial multilayers called hyperbolic metamaterials (HMMs). Associated to DSs, a rich phenomenology arises that justifies the ever-increasing interest profuse by the photonic community in achieving an active control of their properties. As an example, the possibility to “canalize” light down to the nanoscale as well as the capability of HMMs to interact with quantum emitters, placed in their proximity, enhancing their emission rate (Purcell effect), are worth mentioning. HMMs, however, suffer of an intrinsic lack of tunability of its DSs. Several architectures have been proposed to overcome this limit and, among them, the use of graphene outstands. Graphene-based HMMs recently shown outstanding canalization capabilities achieving λ/1660 light collimation. Despite the exceptional performances promised by these structures, stacking graphene/oxide multilayers is still an experimental challenge, especially envisioning electrical gating of all the graphene layers. In this paper, we propose a valid alternative in which indium-tin-oxide (ITO) is used as an electrically tunable metal. Here we have numerically designed and analyzed an ITO/SiO2 based HMM with a tunable canalization wavelength within the range between 1.57 and 2.74 μm. The structure feature light confinement of λ/8.8 (resolution of about 178 nm), self-focusing of the light down to 0.26 μm and Purcell factor of approximately 700. The proposed HMM nanoarchitecture could be potentially used in many applications, such as ultra-fast signal processing, high harmonic generation, lab-on-a-chip nanodevices, bulk plasmonic waveguides in integrated photonic circuits and laser diode collimators.
AB - Dielectric singularities (DSs) constitute one of the most exotic features occurring in the effective permittivity of artificial multilayers called hyperbolic metamaterials (HMMs). Associated to DSs, a rich phenomenology arises that justifies the ever-increasing interest profuse by the photonic community in achieving an active control of their properties. As an example, the possibility to “canalize” light down to the nanoscale as well as the capability of HMMs to interact with quantum emitters, placed in their proximity, enhancing their emission rate (Purcell effect), are worth mentioning. HMMs, however, suffer of an intrinsic lack of tunability of its DSs. Several architectures have been proposed to overcome this limit and, among them, the use of graphene outstands. Graphene-based HMMs recently shown outstanding canalization capabilities achieving λ/1660 light collimation. Despite the exceptional performances promised by these structures, stacking graphene/oxide multilayers is still an experimental challenge, especially envisioning electrical gating of all the graphene layers. In this paper, we propose a valid alternative in which indium-tin-oxide (ITO) is used as an electrically tunable metal. Here we have numerically designed and analyzed an ITO/SiO2 based HMM with a tunable canalization wavelength within the range between 1.57 and 2.74 μm. The structure feature light confinement of λ/8.8 (resolution of about 178 nm), self-focusing of the light down to 0.26 μm and Purcell factor of approximately 700. The proposed HMM nanoarchitecture could be potentially used in many applications, such as ultra-fast signal processing, high harmonic generation, lab-on-a-chip nanodevices, bulk plasmonic waveguides in integrated photonic circuits and laser diode collimators.
KW - epsilon-near-zero-and-pole
KW - Purcell factor
KW - Photonic density of states (PDOS)
KW - High resolution
KW - Canalization of light
UR - https://naukawpolsce.pl/aktualnosci/news%2C94552%2Cnowy-metamaterial-na-zakres-bliskiej-podczerwieni.html
U2 - 10.1038/s41598-022-21252-x
DO - 10.1038/s41598-022-21252-x
M3 - Article
C2 - 36217019
AN - SCOPUS:85139498308
SN - 2045-2322
VL - 12
JO - Scientific Reports
JF - Scientific Reports
IS - 1
M1 - 16961
ER -