Enabling novel functionality in heavily doped ZnO:Ga by nanostructuring: an efficient plasmonic refractive index sensor
| Autor: | Sascha Kalusniak, Alexander S. Kuznetsov, Sergey Sadofev, Peter Schäfer, Deepak Prasai, Wilfred John |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Physics::Optics Bioengineering Nanotechnology Near and far field 02 engineering and technology Grating 01 natural sciences 010309 optics 0103 physical sciences General Materials Science Electrical and Electronic Engineering Plasmon business.industry Mechanical Engineering Surface plasmon Doping General Chemistry 021001 nanoscience & nanotechnology Surface plasmon polariton Mechanics of Materials Optoelectronics 0210 nano-technology business Refractive index Excitation |
| Zdroj: | Nanotechnology. 27:02LT02 |
| ISSN: | 1361-6528 0957-4484 |
| DOI: | 10.1088/0957-4484/27/2/02lt02 |
| Popis: | We demonstrate a proof-of-concept refractive index sensor based on heavily doped ZnO:Ga nanostructured in a grating configuration, which supports free space excitation of propagating surface plasmons. The bulk sensitivity of the sensor of 4.9 × 10(3) nm per refractive index unit, achieved in the mid-infrared spectral range with the first grating prototype, surpasses that of the noble metal counterparts by three to four times. Sensing performance is discussed in the light of numerical simulations of the spatial profile of the near field of surface plasmon polaritons. |
| Databáze: | OpenAIRE |
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