Actively tunable optical Yagi-Uda nanoantenna with bistable emission characteristics

Abstract

We suggest and study theoretically a novel type of optical Yagi-Uda nanoantennas tunable via variation of the free-carrier density of a semiconductor disk placed in a gap of a metallic dipole feeding element. Unlike its narrowband all-metal counterparts, this nanoantenna exhibits a broadband unidirectional emission and demonstrates a bistable response in a preferential direction of the far-field zone, which opens up unique possibilities for ultrafast control of subwavelength light not attainable with dipole or bowtie architectures.

References in corpus (3)

• Circuit elements at optical frequencies: nano-inductors, nano-capacitors and nano-resistors
• Input Impedance, Nanocircuit Loading, and Radiation Tuning of Optical Nanoantennas
• Metal-coated nano-cylinder cavity for broadband nonclassical light emission

Cited by in corpus (1)

• Optical Yagi-Uda nanoantennas