We present measurements at 10.6 µm that demonstrate electronic tuning of the polarization response of asymmetric-spiral infrared antennas connected to Ni–NiO–Ni diodes. Continuous variation of the bias voltage applied to the diode results in a rotation of the principal axis of the polarization ellipse of the spiral antenna. A 90° tuning range is measured for a bias voltage that varies from -160 to +160 mV .This effect is caused by a small asymmetry of the deposited diode contact or by a variation of the detector capacitance with the applied bias voltage.
© 1998 Optical Society of America
G. D. Boreman, C. Fumeaux, W. Herrmann, F. K. Kneubühl, and H. Rothuizen, "Tunable polarization response of a planar asymmetric-spiral infrared antenna," Opt. Lett. 23, 1912-1914 (1998)