Please use this identifier to cite or link to this item:
|Title:||Greatly enhanced continuous-wave terahertz emission by nano-electrodes in a photoconductive photomixer|
|Source:||Tanoto, H.,Teng, J.H.,Wu, Q.Y.,Sun, M.,Chen, Z.N.,Maier, S.A.,Wang, B.,Chum, C.C.,Si, G.Y.,Danner, A.J.,Chua, S.J. (2012-02). Greatly enhanced continuous-wave terahertz emission by nano-electrodes in a photoconductive photomixer. Nature Photonics 6 (2) : 121-126. ScholarBank@NUS Repository. https://doi.org/10.1038/nphoton2011322|
|Abstract:||An efficient, room-temperature-operation continuous-wave terahertz source will greatly benefit compact terahertz system development for high-resolution terahertz spectroscopy and imaging applications. Here, we report highly efficient continuous-wave terahertz emission using nanogap electrodes in a photoconductive antenna-based photomixer. The tip-to-tip nanogap electrode structure provides strong terahertz field enhancement and acts as a nano-antenna to radiate the terahertz wave generated in the active region of the photomixer. In addition, it provides good impedance-matching to the terahertz planar antenna and exhibits a lower RC time constant, allowing more efficient radiation, especially at the higher part of the terahertz spectrum. As a result, the output power of the photomixer with the new nanogap electrode structure in the active region is two orders of magnitude higher than for a photomixer with typical interdigitated electrodes. The terahertz emission bandwidth also increases by a factor of more than two. © 2012 Macmillan Publishers Limited. All rights reserved.|
|Source Title:||Nature Photonics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Dec 4, 2017
checked on Dec 8, 2017
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.