SCIENTIFIC HIGHLIGHTS

Electrodeposited Negative Index Metamaterials with Visible and Near Infrared Response
07 August 2020
Negative index metamaterials have revolutionized the field of photonics because of their unconventional electromagnetic properties absent in naturally occurring materials. It remains a challenge however, to achieve strong negative refractive index at optical frequencies over large areas in a device compatible fashion.
In this work, a scalable method for the straightforward production of fishnet‐like negative index metamaterials combining soft nanoimprinting and electrodeposition is reported. In four simple steps, 2D arrays of pillars surrounded by metal–insulator–metal stacks made of gold and air gaps are created. The proper design of the geometrical features leads to negative indices from the visible to the near infrared, with values from ‐1.2 at 700 nm to ‐2.8 at 910 nm. The metamaterials are prepared on transparent conductive electrodes hence ready for device implementation. In addition, the nanostructures display high optical quality, which is corroborated with numerical simulations under normal and oblique incidence. As a proof of concept, the accessibility to the porosity of the metamaterial by studying the spectral changes produced when infiltrating different liquids through the metallic layers is demonstrated. The resonant wavelength increasing with the refractive index of the media makes the metamaterials potential platforms for both negative index structures and optical sensors.

Electrodeposited Negative Index Metamaterials with Visible and Near Infrared Response
Mayte Gómez‐Castaño, Juan Luis Garcia‐Pomar, Luis Alberto Pérez, Sharvina Shanmugathasan, Serge Ravaine, Agustín Mihi. 
Adv. Optical Mater2020, 2000865
DOI: 10.1002/adom.202000865

Electrodeposited Negative Index Metamaterials with Visible and Near Infrared Response

 

 
Hits: 986
Sustainable energy conversion & storage systems

Electrodeposited Negative Index Metamaterials with Visible and Near Infrared Response



Also at ICMAB

  • High-throughput screening of blade coated polymer:polymer solar cells: solvent determines achievable performance

    Information
    28 January 2022 115 hit(s) Energy
    Optimization of a new system for organic solar cells is a multiparametric analysis problem which requires substantial efforts in terms of time and resources. The strong microstructure dependent performance of polymer:olymer cells makes them particularly difficult to optimize, or to translate previous knowledge from spin coating into more scalable techniques.
  • Interfaces and Interphases in Ca and Mg Batteries

    Information
    14 January 2022 201 hit(s) Energy
    The development of high energy density battery technologies based on divalent metals as the negative electrode is very appealing. Ca and Mg are especially interesting choices due to their combination of low standard reduction potential and natural abundance.
  • Giant Thermal Transport Tuning at a Metal / Ferroelectric Interface

    Information
    27 December 2021 287 hit(s) Energy
    Interfacial thermal transport plays a prominent role in the thermal management of nanoscale objects and is of fundamental importance for basic research and nanodevices. At metal/insulator interfaces, a configuration commonly found in electronic devices, heat transport strongly depends upon the effective energy transfer from thermalized electrons in the metal to the phonons in the insulator.
  • Storing energy with molecular photoisomers

    Information
    14 December 2021 360 hit(s) Energy
    The global energy demand continues to grow both due to the increasing population and wealth. As one of the potential solutions, renewable energy resources can relieve the pressure on conventional energy sources. However, due to fluctuations in both supply and demand, they need to be complemented with load-leveling technologies.

INSTITUT DE CIÈNCIA DE MATERIALS DE BARCELONA, Copyright © 2020 ICMAB-CSIC | Privacy Policy | This email address is being protected from spambots. You need JavaScript enabled to view it.