The three-dimensional multi-parameters controllable auto-focusing-type chiral optical light

Abstract

Beams with auto-focusing property and a controllable number of wave lobes are of special significance. In this work, based on the helical phase-tuning and the Airy beam, we generate a chiral optical light, which focuses with both radial and angular self-accelerations. The light using the three-dimensional (3D) velocity to control the propagation dimension and the auto-rotating property of intensity peak for the two transverse dimensions is termed as 3D auto-focusing-type chiral optical light (ACOL), which can be controlled by multi-parameters theoretically and experimentally for possessing the characteristics of chiral, focusing, acceleration, rotation, etc. Owing to these characteristics, the ACOL has promising applications in optical micro-manipulation and super-resolution imaging.

Generation of auto-focusing vortex beam via segment vortex phase for imaging edge-enhancement

“…The phase modulation in the optical field is now a common method to generate arbitrary structure lights and optical imaging [1][2][3][4][5]. For example, the authors generated optical tornado waves using spatial multiplexing on a single-phase modulation device [1].…”

“…The authors generated multi-twisted beams with twisted intensity lobes by superimposing helical phases consisting of multiple independent sub-phases with different azimuthal shift factors [2]. Moreover, most of the studies [3][4][5], employed a double helix phase to generate auto-focusing-type chiral optical light [3], achieve three-dimensional (3D) incoherent imaging [4], and detect accurate single image depth [5]. In addition, researchers have confirmed that the metasurfaces also help with phase manipulation, such as the chirality-assisted phase metasurface for independent hologram imaging in the microwave region and the bi-isotropic Huygens' metasurface for wavefront manipulation [6,7].…”

Propagation property of the abruptly auto-focusing multi-focus beam

“…Focused beams can be used to manipulate small particles and improve the signal-to-noise ratio for free-space optical links [1,2]. Researches have shown that some beams have abrupt auto-focusing properties, such as circular Airy beams (CABs) [1,3], circle Pearcey beams [4,5], circle Olver beams [6], and so on [7][8][9]. It is worth mentioning that the CABs have attracted a lot of attention due to their auto-focusing property.…”

Role of chirped factor on the focusing and imaging properties of the autofocusing beam

“…The CABs are a type of the abruptly autofocusing beams (AABs). Due to the CABs by the modulation of the special function or the modulation of phase, the CAB has been widely extended from single-focus CABs to multi-focus beams and from abruptly autofocusing vortex beams to auto-focusing-type chiral optical light [4][5][6]. In existing works, the CABs can weaken the beam-spreading effect induced by atmospheric turbulence [7].…”