標題: | Liquid crystal terahertz photonics with indium tin oxide nanowhiskers and graphene as functional electrodes |
作者: | Yang, Chan-Shan Pan, Ru-Pin Pan, Ci-Ling 電子物理學系 Department of Electrophysics |
關鍵字: | Far infrared or terahertz;phase shift;liquid-crystal devices;spectroscopy;terahertz;transparent conductive coatings |
公開日期: | 1-Jan-2015 |
摘要: | We have constructed and characterized THz phase shifters based on liquid crystals (LCs) with graphene grown by chemical vapor deposition (CVD) and indium-tin-oxide nanowhiskers (ITO NWhs) as transparent conducting electrodes. A graphene-based phase shifter can achieve a phase shift of pi/2 at 1.0 THz with the operating voltage of similar to 2.2 V (rms) as opposed to similar to 5.6 V (rms) for ITO-NWhs-based phase shifter in previous work. On the other hand, 2 pi phase shift at 1.0 THz was achieved in an ITO-NWhs-based phase shifter with a multi-sandwiched structure by applying similar to 2.6 V (rms). The low operation voltage of both two kinds of phase shifters imply compatibility of both type of devices with thin-film transistor (TFT) and complementary metal-oxide-semiconductor (CMOS) technologies. The experimental results of phase shifters are in good agreement with the theoretical predictions. |
URI: | http://dx.doi.org/10.1117/12.2079324 http://hdl.handle.net/11536/125090 |
ISBN: | 978-1-62841-474-5 |
ISSN: | 0277-786X |
DOI: | 10.1117/12.2079324 |
期刊: | EMERGING LIQUID CRYSTAL TECHNOLOGIES X |
Volume: | 9384 |
起始頁: | 0 |
結束頁: | 0 |
Appears in Collections: | Conferences Paper |
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