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|Title:||Finite-boundary bowtie aperture antenna for trapping nanoparticles|
|Source:||Ye, H., Wang, H., Yeo, S.P., Qiu, C. (2013). Finite-boundary bowtie aperture antenna for trapping nanoparticles. Progress in Electromagnetics Research 136 : 17-27. ScholarBank@NUS Repository. https://doi.org/10.2528/PIER12112601|
|Abstract:||We have found that a single finite-boundary bowtie aperture (FBBA) antenna with gap separation of 10nm between its tips is capable of confining the electric field to a 18nm * 18nm region (̧=39:4) at 5nm beneath the gold film and enhancing its near- field intensity by 1,800-fold inside the gap. The FBBA antenna is thus able to provide enhanced trapping potential by virtue of such extraordinarily high (but exponentially decaying) optical near-fields. We have been able to show that 12nm gold nanoparticles can, in principle, be trapped by the FBBA antenna with 20nm gap separation; stable trapping is assured where the trapping potential is found to be several times higher than Brownian-motion potential in water. In addition to trapping nanoparticles, this simple but efficient FBBA antenna may find application in near-field optical data storage.|
|Source Title:||Progress in Electromagnetics Research|
|Appears in Collections:||Staff Publications|
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