Electronically controlled optical beam-steering by an active phased array of metallic nanoantennas.

Optics Express (Impact Factor: 3.53). 02/2013; 21(4):5198-5208. DOI: 10.1364/OE.21.005198
Source: PubMed

ABSTRACT An optical phased array of nanoantenna fabricated in a CMOS compatible silicon photonics process is presented. The optical phased array is fed by low loss silicon waveguides with integrated ohmic thermo-optic phase shifters capable of 2π phase shift with ∼ 15 mW of applied electrical power. By controlling the electrical power to the individual integrated phase shifters fixed wavelength steering of the beam emitted normal to the surface of the wafer of 8° is demonstrated for 1 × 8 phased arrays with periods of both 6 and 9 μm.

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