期刊
APPLIED PHYSICS LETTERS
卷 99, 期 23, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3668089
关键词
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资金
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0007902]
- National Research Foundation of Korea [2010-0007902] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In order to study the optical switching of vanadium dioxide (VO2) and its thermal hysteresis behavior, we fabricated VO2 films on glass substrates at various oxygen pressures. Only the VO2 films made at 5-10 mTorr displayed x-ray diffraction peaks and metal-insulator transition. Upon heating and cooling, remarkably, these samples exhibited significant optical switching behaviors with a clockwise thermal hysteresis in the infrared range of >850 nm or with a counterclockwise thermal hysteresis in the near visible range of 650-850 nm. The temperature dependence of optical absorption was explained by the O-2p-V-3d splitting depending on the structural transition of VO2. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3668089]
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