基于VO_2相变特性的THz波动态调控研究进展
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摘要
太赫兹(Terahertz,THz)波位于光子学向电子学的过渡区域,在高速宽带通信、雷达、成像等领域具有重要应用前景。但目前用于THz波动态调控的器件仍比较缺乏,这在一定程度上限制了THz技术的发展。VO_2具有独特的金属—绝缘体相变特性,相变过程可以应用于动态调控THz波传输。探索超材料与VO_2结合以制备高效、动态、灵活的太赫兹功能器件也是近来的研究热点。简述了VO_2的相变特性,并分析了微观结构和化学成分等因素对相变特性的影响;系统回顾了VO_2薄膜相变过程中的THz波调控性能研究进展,总结了VO_2与超材料不同结合方式在THz波动态调控方面的应用;并对基于VO_2相变特性的THz波调控功能器件发展前景与挑战进行了展望。
The terahertz( THz) wave is located in the transition region of photonics to electronics, and has important application prospects in high-speed broadband communication, radar, imaging and other fields. However, the devices currently used for dynam-ic regulation of THz waves are still lacking, which limits the development of THz technology to some extent. VO_2 has an unique metal-insulator phase change characteristic, and the phase change process can be applied to dynamically regulate THz wave trans-mission. It is also a recent research hotspot to explore the combination of metamaterials and VO_2 to prepare efficient, dynamic and flexible terahertz functional devices. In this paper, the phase transition characteristics of VO_2 are briefly described, and the effects of microstructure and chemical composition on phase transition characteristics are analyzed. The research progress of VO_2 film in THz band regulation performance is reviewed systematically, and the different combinations of VO_2 and metamaterials are summarized. In the application of THz wave dynamic regulation, the development prospects and challenges of THz wave regulation function devices based on VO_2 phase transition characteristics are prospected.
The terahertz( THz) wave is located in the transition region of photonics to electronics, and has important application prospects in high-speed broadband communication, radar, imaging and other fields. However, the devices currently used for dynam-ic regulation of THz waves are still lacking, which limits the development of THz technology to some extent. VO_2 has an unique metal-insulator phase change characteristic, and the phase change process can be applied to dynamically regulate THz wave trans-mission. It is also a recent research hotspot to explore the combination of metamaterials and VO_2 to prepare efficient, dynamic and flexible terahertz functional devices. In this paper, the phase transition characteristics of VO_2 are briefly described, and the effects of microstructure and chemical composition on phase transition characteristics are analyzed. The research progress of VO_2 film in THz band regulation performance is reviewed systematically, and the different combinations of VO_2 and metamaterials are summarized. In the application of THz wave dynamic regulation, the development prospects and challenges of THz wave regulation function devices based on VO_2 phase transition characteristics are prospected.
引文
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[25]ZHANG C,ZHOU G,WU J,et al.Active control of terahertz waves using vanadium-dioxide-embedded metama terials[J].Physical Review Applied,2019,11(5):054016.
[26]NOUMAN M T,HWANG J H,FAIYAZ M,et al.Vanadium dioxide based frequency tunable metasurface fil ters for realizing reconfigurable terahertz optical phase and polarization control[J].Optics Express,2018,26(10):12922-12929.
[27]ZHAO Y,ZHANG Y X,SHI Q,et al.Dynamic photoinduced controlling of the large phase shift of terahertz waves via vanadium dioxide coupling nanostructures[J].ACS Photonics,2018,5(8):3040-3050.
[28]ZHENG X X,XIAO Z,LING X.A tunable hybrid metamaterial reflective polarization converter based on vanadium oxide film[J].Plasmonics,2018,13(1):287-291.
[29]WEN Q Y,ZHANG H W,YANG Q H,et al.Terahertz metamaterials with VO2cut-wires for thermal tunability[J].Applied Physics Letters,2010,97(2):021111.
[30]LIU H,WANG Z H,LI L,et al.Vanadium dioxide-assisted broadband tunable terahertz metamaterial absorber[J].Scientific Reports,2019,9(1):5751.
[2]MORIN F J.Oxides which show a metal-to-insulator transition at the Neel temperature[J].Physical Review Letters,1959,3(1):34-36.
[3]QAZIBASH M M,BREHM M,CHAE B,et al.Mott transition in VO2revealed by infrared spectroscopy and nanoimaging[J].Science,2007,318(5857):1750-1753.
[4]LYSENKO S,VIKHNIN V,FERNANDEZ F,et al.Photoinduced insulator-to-metal phase transition in VO2crystalline films and model of dielectric susceptibility[J].Physical Review B,2007,75(7):075109.
[5]LEE J S,ORTOLANI M,SCHADE U,et al.Microspectroscopic detection of local conducting areas generated by electric-pulse-induced phase transition in VO2films[J].Applied Physics Letter,2007,91(13):133509.
[6]SHAO Z,CAO X,LUO H,et al.Recent progress in the phase-transition mechanism and modulation of vanadium dioxide materials[J].NPG ASIA Materials,2018,10:581-605.
[7]CASE F C.Modifications in the phase transition properties of predeposited VO2films[J].Journal of Vacuum Science&Technology A:Vacuum,Surfaces,and Films,1984,2(4):1509-1512.
[8]JI C,WU Z,WU X,et al.Optimization of metal-to-insulator phase transition properties in polycrystalline VO2films for terahertz modulation applications by doping[J].Journal of Physical Chemistry C,2018,6(7):1722-1730.
[9]MAI L Q,HU B,HU T,et al.Electrical property of Mo-doped VO2nanowire array film by melting-quenching sol-gel method[J].Journal of Physical Chemistry B,2006,110(39):19083-19086.
[10]JEPSEN P U,FISCHER B M,THOMAN A,et al.Metalinsulator phase transition in a VO2thin film observed with terahertz spectroscopy[J].Physical Review B,2006,74(20):205103.
[11]NAKAJIMA M,TAKUBO N,HIROI Z,et al.Photoinduced metallic state in VO2 proved by the terahertz pump-probe spectroscopy[J].Applied Physics Letters,2008,92(1):011907.
[12]CHEN C,ZHU Y,ZHAO Y,et al.VO2 multidomain heteroepitaxial growth and terahertz transmission modulation[J].Applied Physics Letters,2010,97(21):211905.
[13]MANDAL P,SPECK A,KO C,et al.Terahertz spectroscopy studies on epitaxial vanadium dioxide thin films across the metal-insulator transition[J].Optics Letters,2011,36(10):1927-1929.
[14]SHI Q W,HUANG W,LU T,et al.Nanostructured VO2film with high transparency and enhanced switching ratio in THz range[J].Applied Physics Letters,2014,104(7):071903.
[15]SHI Q W,HUANG W X,XU Y J,et al.Synthesis and terahertz transmission properties of nano-porous vanadium dioxide films[J].Journal of Physics D:Applied Physics,2012,45(38):385302.
[16]SHI Q,HUANG W,ZHANG Y,et al.Giant phase transition properties at terahertz range in VO2films deposited by sol-gel method[J].ACS Applied Materials&Interfaces,2011,3(9):3523-3527.
[17]ZHU H F,LI J,ZHONG S,et al.Continuously tuning the impedance matching at the broadband terahertz frequency range in VO2thin film[J].Optical Materials Express,2019,9(1):315-329.
[18]ZHU H F,DU L H,LI J,et al.Near-perfect terahertz wave amplitude modulation enabled by impedance matching in VO2thin films[J].Applied Physics Letters,2018,112(8):081103.
[19]DRISCOLL T,PALIT S,QAZILBASH M M,et al.Dynamic tuning of an infrared hybrid-metamaterial resonance using vanadium dioxide[J].Applied Physics Letters,2008,93(2):024101.
[20]HU F,LI Y,XU X,et al.Broadband large-modulationdepth low-current-triggered terahertz intensity modulator based on VO2embedded hybrid metamaterials[J].Applied Physics Express,2018,11(9):092004.
[21]ZHANG Y,QIAO S,SUN L,et al.Photoinduced active terahertz metamaterials with nanostructured vanadium dioxide film deposited by sol-gel method[J].Optics Express,2014,22(9):11070-11078.
[22]LI X F,TANG S,DING F,et al.Switchable multifunctional terahertz metasurfaces employing vanadium dioxide[J].Scientific Reports,2019,9(1):5454.
[23]ZHAO Y,HUANG Q,CAI H,et al.A broadband and switchable VO2-based perfect absorber at the THz frequency[J].Optics Communications,2018,426:443-449.
[24]CAI H L,CHEN S,ZOU C,et al.Multifunctional hybrid metasurfaces for dynamic tuning of terahertz waves[J].Advanced Optical Materials,2018,6(14):1800257.
[25]ZHANG C,ZHOU G,WU J,et al.Active control of terahertz waves using vanadium-dioxide-embedded metama terials[J].Physical Review Applied,2019,11(5):054016.
[26]NOUMAN M T,HWANG J H,FAIYAZ M,et al.Vanadium dioxide based frequency tunable metasurface fil ters for realizing reconfigurable terahertz optical phase and polarization control[J].Optics Express,2018,26(10):12922-12929.
[27]ZHAO Y,ZHANG Y X,SHI Q,et al.Dynamic photoinduced controlling of the large phase shift of terahertz waves via vanadium dioxide coupling nanostructures[J].ACS Photonics,2018,5(8):3040-3050.
[28]ZHENG X X,XIAO Z,LING X.A tunable hybrid metamaterial reflective polarization converter based on vanadium oxide film[J].Plasmonics,2018,13(1):287-291.
[29]WEN Q Y,ZHANG H W,YANG Q H,et al.Terahertz metamaterials with VO2cut-wires for thermal tunability[J].Applied Physics Letters,2010,97(2):021111.
[30]LIU H,WANG Z H,LI L,et al.Vanadium dioxide-assisted broadband tunable terahertz metamaterial absorber[J].Scientific Reports,2019,9(1):5751.