Print Email Facebook Twitter Dynamic Beam Steering from a Subwavelength Slit by Selective Excitation of Guided Modes Title Dynamic Beam Steering from a Subwavelength Slit by Selective Excitation of Guided Modes Author Raghunathan, S.B. Schouten, H.F. Ubachs, W. Ea Kim, B. Gan, C.H. Visser, T.D. Faculty Applied Sciences Department IST/Imaging Science and Technology Date 2013-10-08 Abstract Dynamic control of the direction of radiation of the light emanating from a subwavelength slit carved out of a thin metal film is experimentally demonstrated. This is achieved by selective excitation of the individual guided modes in the slit by setting the phase of three coherent laser beams. By changing the voltage across a piezoelement, we obtain unprecedented directional steering, without relying on any mechanical alignment of optical elements. The angular range over which this maximum can be swept is determined by the intensity setting of one of the incident beams. Through simulations, we show that this method can also be applied to steer the radiation from a square hole in two independent directions. Our method can be applied to create a directional nanoemitter which can selectively address one or more detectors, or as an optical switch in photonic circuits. To reference this document use: http://resolver.tudelft.nl/uuid:cd770796-4aa4-4533-81a1-4323be1d4288 DOI https://doi.org/10.1103/PhysRevLett.111.153901 Publisher American Physical Society ISSN 0031-9007 Source http://link.aps.org/doi/10.1103/PhysRevLett.111.153901 Source Physical Review Letters, 111 (15), 2013 Part of collection Institutional Repository Document type journal article Rights © 2013 American Physical Society Files PDF Raghunathan_2013.pdf 653.22 KB Close viewer /islandora/object/uuid:cd770796-4aa4-4533-81a1-4323be1d4288/datastream/OBJ/view