TY - JOUR

T1 - Intensity‐Enhanced Apodization Effect on an Axially Illuminated Circular‐Column Particle‐Lens

AU - Yue, Liyang

AU - Yan, Bing

AU - Monks, James

AU - Dhama, Rakesh

AU - Wang, Zengbo

AU - Minin, Oleg

AU - Minin, Igor

PY - 2018/2

Y1 - 2018/2

N2 - A particle can function as a refractive lens to focus a plane wave, generating a narrow, high intensive, weak-diverging beam within a sub-wavelength volume, known as the ‘photonic nanojet’. It is known that apodization method, in the form of an amplitude pupil-mask centrally situated on a particle-lens, can further reduce the waist of a photonic nanojet, however, it usually lowers the intensity at the focus due to blocking the incident light. In this paper, the anomalously intensity-enhanced apodization effect was discovered for the first time via numerical simulation of focusing of the axially illuminated circular-column particle-lenses, and a greater than 100% peak intensity increase was realised for the produced photonic nanojets.

AB - A particle can function as a refractive lens to focus a plane wave, generating a narrow, high intensive, weak-diverging beam within a sub-wavelength volume, known as the ‘photonic nanojet’. It is known that apodization method, in the form of an amplitude pupil-mask centrally situated on a particle-lens, can further reduce the waist of a photonic nanojet, however, it usually lowers the intensity at the focus due to blocking the incident light. In this paper, the anomalously intensity-enhanced apodization effect was discovered for the first time via numerical simulation of focusing of the axially illuminated circular-column particle-lenses, and a greater than 100% peak intensity increase was realised for the produced photonic nanojets.

M3 - Article

VL - 530

JO - Annalen der Physik

JF - Annalen der Physik

SN - 1521-3889

IS - 2

M1 - 1700384

ER -