Photoexited switchable metamaterial absorber at terahertz frequencies

Tunable and reconfigurable metasurfaces and metadevices

“…The ability to tune the carrier concentration and the refractive index of semiconductor material renders them promising perspectives for tunable metasurface and metadevices. Recently there have been numerous reports on tunable metasurfaces using a semiconductor as the tunable material for optical tuning 58,[217][218][219][220][221][222][223][224][225][226][227][228] electrical tuning 107,139 and the combination of both electrical and optical excitation 155,229 .…”

Plasmon-Induced Transparency Based on Triple Arc-Ring Resonators

“…In this section, we discuss the potential functional applications as a device. Plenty of efforts around pump-beam sensitive medium in metamaterial [ 30 , 31 , 32 , 33 ] have been proved to realize extensive performance controls and functional regulations. In this section, we introduce the photosensitive silicon into the structure to study the switching function.…”

Design of a tunable multiband terahertz waves absorber

“…Recent progress in the passive tuning by the incorporation of naturally occurring materials within or as part of the metamaterial elements has recently been reported. For example, metamaterials have been tuned by loading dielectrics onto their surface and also by integrating semiconductors or carbon nanotubes within the structure to provide electronic or optical control of the resonance frequency [16][17][18][19][20]. Some designers used the methods of using the thermal control to realize the tunability, some were based on a variation of temperature altering the intrinsic carrier density in a semiconductor (InSb) [21,22].…”

“…Some designers used the methods of using the thermal control to realize the tunability, some were based on a variation of temperature altering the intrinsic carrier density in a semiconductor (InSb) [21,22]. Others used the photoexcited carrier by integrating semiconductors into metamaterial designs [19,20,23] and also someone used the property of ferrimagnetic/paramagnetic transition of the M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT ferrites [24]. In addition to the magnetically tunable metamaterial is also a more effective way, some of them used the ferromagnetic precession of ferrite [25] ， and others used the ferromagnetic resonance (FMR) frequency which can be influenced by the dimension of the ferrites [26].…”

“…In these previous works, most of the resonant elements can be represented by an effective inductor-capacitor (LC) resonator, and the resonance frequency is dependent on the effective capacitance C and inductance L. So the method of tunability is introducing another component made from an electro-optic material [31][32][33], liquid crystal [34][35][36], ferrite [37,38], semiconductor [19,20,23] and superconductors [39], liquid metals [40], chemical control [41]to alter L, C or both of them. …”