  A tunable metasurface absorber is presented in this work using an
optically-programmable capacitor as the tuning element. The tuning element does
not employ conventional semiconductor technologies to operate but rather a
bases its tuning by changing the optomechanical properties of its dielectric,
poly disperse red 1 acrylate (PDR1A). Doing so there are no conventional
semiconductor devices in the RF signal path. The metasurface operates at a
design frequency of 5.5 GHz and it achieves an optically-tuned bandwidth of 150
MHz, from 5.50 GHz to 5.65 GHz.
