Tunable THz flat zone plate based on stretchable single-walled carbon nanotube thin film

Tunable optoelectronics have attracted a lot of attention in recent years because their variety applications next-generation devices. Among the potential uses for tuning optical elements, those allowing consistent parameter control stand out. We present an approach creation mechanically tunable zone plate lenses THz range. Our devices comprise single-walled carbon nanotube (SWCNT) thin films predetermined design integrated with stretchable polymer films. These offer high-performance and situ tunability focal length up to 50%. studied focusing properties our using backward-wave oscillator imaging technique, supported by numerical simulations based on finite element frequency domain method. may further enable integration SWCNT into photonic optoelectronic could be use flexible elements.