期刊
OPTICS EXPRESS
卷 18, 期 3, 页码 2797-2807出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.18.002797
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资金
- European Community [FP7-224189]
- Nederlandse Organisatie voor Wetenschappelik Onderzoek (NWO)
- Spain Ministerio de Ciencia e Innovacion [CSD2008-00066]
- NANOPLAS [FIS2009 11264]
- US Air Force Office of Scientific Research (AFOSR)
- EPSRC [EP/D063329/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D063329/1] Funding Source: researchfish
Terahertz plasmonic resonances in semiconductor (indium antimonide, InSb) dimer antennas are investigated theoretically. The antennas are formed by two rods separated by a small gap. We demonstrate that, with an appropriate choice of the shape and dimension of the semiconductor antennas, it is possible to obtain large electromagnetic field enhancement inside the gap. Unlike metallic antennas, the enhancement around the semiconductor plasmonics antenna can be easily adjusted by varying the concentration of free carriers, which can be achieved by optical or thermal excitation of carriers or electrical carrier injection. Such active plasmonic antennas are interesting structures for THz applications such as modulators and sensors. (C) 2010 Optical Society of America
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