Faculty of Engineering

Christian-Albrechts-Universitšt zu Kiel

Nanochemistry and Nanoengineering group

 

 

 

 

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Plasmonic Devices

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Plasmonic metamaterials are artificial structures with exotic properties coming from their plasmon resonance. Recently this topics attracted the attention because of its great potential for broad area of application ranging from optics to energy. In our research group, we are dealing with the mentioned concept for two purposes which are directly correlated to each other, namely; transparent conductor and solar absorber.

 

  •  Plasmonic Metamaterials for Harvesting Energy

 

Thick metallic film are known as an excellent mirror but when they are structured, the reflectance fades away because the light gets absorbed by the excitation of the conduction electrons by electromagnetic waves which is generally known as plasmon resonance. This concept has been used in the last few decades to realize highly absorbing systems in diverse areas of the electromagnetic spectrum but these works were either successful only for a very narrow range of frequencies or the absorbance was distant from that of blackbody materials. However, we have recently shown that one can benefit from the plasmonic properties of the nanocomposite in a way to absorb almost all part of the visible light. Indeed, such a system have a great potential to be used in photovoltaic in order to improve the efficiency of the available solar panels.

 

  • Plasmonic Transparent  Conductive Metal (PTCM)

 

 Transparent electrodes are a necessary component in many modern devices such as touch screens, LCDs, OLEDs, and solar cells, all of which are growing in demand. Traditionally, this role has been well served by doped metal oxides, the most common of which is indium tin oxide (ITO). The task to produce a transparent metal, with conductivity comparable to indium tin oxide (ITO) while retaining high transparency through the visible region has so far proven to be challenging. In this regard, metal–polymer nanocomposites have traditionally been excluded from investigation due to their strong absorption and reflection of visible light. However, we have shown recently that one can benefit from the high electrical conductivity of thin metal film by improving its optical transparency upon coating of plasmonic nanocomposite. By using this idea, we have realized a new transparent conductive metal (for details look at our recent publication).

 

 

 

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Last Update: 10/27/2010