[4] MATLOUB S,HOSSEINZADEH M,ROSTAMI A. The narrow band THz filter in metallic photonic crystal slab framework: design and investigation[J]. Optik-International Journal for Light and Electron Optics, 2014,125(21):6545-6549.
[5] KARAKLN Z N,TEZ S,KAYA M. Photonic crystal bandpass filter exploiting the degenerate modes tunable with MEMS actuator for terahertz application[J]. Microwave and Optical Technology Letters, 2021,63(7):1813-1819.
[6] ZHUANG H,LIU C,LI F,et al. Tunable plasmonic filter based on parallel bulk Dirac semimetals at terahertz frequencies[J]. Applied Optics, 2021,60(13):3634-3640.
[7] JIANG M,HU F,QIAN Y,et al. Tunable terahertz bandpass filter based on MEMS reconfigurable metamaterials[J]. Journal of Physics D:Applied Physics, 2020,53(6):065107.
[8] LUO J,SHI X,LUO X,et al. Broadband switchable terahertz half-/quarter-wave plate based on metal-VO2 metamaterials[J]. Optics Express, 2020,28(21):30861-30870.
[9] KINDNESS S J,ALMOND N W,MICHAILOW W,et al. A terahertz chiral metamaterial modulator[J]. Advanced Optical Materials, 2020,8(21):2000581.
[10] LEE S,BAEK S,KIM T,et al. Metamaterials for enhanced optical responses and their application to active control of terahertz waves[J]. Advanced Materials, 2020,32(35):2000250.
[11] HE X,LIU F,LIN F,et al. Investigation of terahertz all-dielectric metamaterials[J]. Optics Express, 2019,27(10):13831.
[12] WANG Q,GAO B,RAGLIONE M,et al. Terahertz optoelectronics:design,fabrication,and modulation of THz bandpass meta- materials[J]. Laser & Photonics Review, 2019,13(11):1-22.
[13] FAN Y X,QIAN Y X. Multi-band tunable terahertz bandpass filter based on vanadium dioxide hybrid metamaterial[J]. Materials Research Express, 2019,6(055809):1-8.
[14] PARKER-JERVIS R S,PARK S J. Tunable terahertz band-stop filter using strongly coupled split ring resonators integrated with on-chip waveguide[J]. Journal of Applied Physics, 2021,129(5):053101.
[15] JIA K H,FAN L N,CAO Z L. THz narrow bandpass filter based on stopband modulation in corrugated parallel plate waveguides[J]. Optics Communications, 2020,456(125604):1-5.
[16] LEE E S,SO J K,PARK G S,et al. Terahertz band gaps induced by metal grooves inside parallel-plate waveguides[J]. Optics Express, 2012,20(6):6116-6123.
[17] LEE E S,JEON T I. Tunable THz notch filter with a single groove inside parallel-plate waveguides[J]. Optics Express, 2012,20(28):29605-29612.
[18] ZHANG K,FAN Y X,XU L L,et al. Terahertz flat-top broadband defect modes generated in periodically undulated waveguides[J]. Physica Scripta, 2021,96(6):065503.
[19] FERRERA J,THOEN E R,STEINMEYER G,et al. Photonic-bandgap microcavities in optical waveguides[J]. Nature, 1997,390(6656):143-145.
[20] MUNDAY J N,BRADBENNETT C,ROBERTSON W M. Band gaps and defect modes in periodically structured waveguides[J]. Journal of the Acoustical Society of America, 2002,112(4):1353-1358.
[21] ZHANG L,FAN Y X,LIU H,et al. A magnetically tunable non-Bragg defect mode in a corrugated waveguide filled with liquid crystals[J]. Physics Letters A, 2018,382(14):1000-1005.
[22] BELHADJ W,AL-AHMADI A N. Tunable narrowband terahertz multichannel filter based on one-dimensional graphene-dielectric photonic crystal[J]. Optical and Quantum Electronics, 2021,53(1):1-17.
[23] YAN F,LI Q,WANG Z W,et al. Extremely high Q-factor terahertz metasurface using reconstructive coherent mode resonance[J]. Optics Express, 2021,29(5):7015-7023.
