LAUSR

Photonic hooks (PHs) are a new class of curved light beams, they have been theoretically predicted and experimentally observed. The generation of photonic hook (PH) is related to the symmetry-broken of micro-particles under a plane wave illumination. Recently, twin photonic hooks (t-PHs) can be produced utilizing twin-ellipse micro-cylinder. In this paper, we investigate two adjacent parallel cylinders illuminated by a single TE-polarization plane wave for the t-PHs generation using the finite element method. We find that the full width at half-maximum (FWHM) of the t-PHs is less than the diffraction limit (λ/2), but larger than the FWHM of the photonic nanojet (PNJ) formed by a single cylinder. The shape profiles of the t-PHs can be modulated by changing the spacing length and the diameter of the two cylinders. As the spacing length increasing, the curvature degrees of center lines of the t-PHs become smaller. The curvature degree is fluctuant as the cylindrical diameter changing. This work will provide novel applications in optical trapping, nanolithography and integrated optics.