TY - JOUR
T1 - Manipulating the magnetic energy density and energy flux by cylindrically symmetric state of polarization
AU - Yuan, Wenfeng
AU - Man, Zhongsheng
PY - 2019
Y1 - 2019
N2 - Using the Richards and Wolf formulas for an arbitrary cylindrical vector (CV) beam, we obtain explicit expressions for all components of the electric and magnetic field strength vectors near the focus, as well as expression for the energy flux in an aplanatic optical system. Based on such analytical models, it reveals that the intensity pattern of the magnetic field at the focus can be tailored by appropriately adjusting the initial phase, peak-centered, doughnut, and flat-topped magnetic fields can be achieved using this method. For the energy flows, in contrast, they are almost the same for arbitrary CV beams, which exhibit hollow shaped patterns for both the transverse and longitudinal components. Unlike the longitudinal component, however, the hollow shaped pattern of the transverse component is separated into two regions, arriving from the null transverse energy flow in the focal plane. Besides, the directions of the transverse energy flow are reversed between these two regions, which are directed inwardly and outwardly along the radial direction, respectively.
AB - Using the Richards and Wolf formulas for an arbitrary cylindrical vector (CV) beam, we obtain explicit expressions for all components of the electric and magnetic field strength vectors near the focus, as well as expression for the energy flux in an aplanatic optical system. Based on such analytical models, it reveals that the intensity pattern of the magnetic field at the focus can be tailored by appropriately adjusting the initial phase, peak-centered, doughnut, and flat-topped magnetic fields can be achieved using this method. For the energy flows, in contrast, they are almost the same for arbitrary CV beams, which exhibit hollow shaped patterns for both the transverse and longitudinal components. Unlike the longitudinal component, however, the hollow shaped pattern of the transverse component is separated into two regions, arriving from the null transverse energy flow in the focal plane. Besides, the directions of the transverse energy flow are reversed between these two regions, which are directed inwardly and outwardly along the radial direction, respectively.
KW - Diffractive optics
KW - Optical tweezers or optical manipulation
KW - Polarization
UR - http://www.scopus.com/inward/record.url?scp=85063597868&partnerID=8YFLogxK
U2 - 10.1016/j.ijleo.2019.03.103
DO - 10.1016/j.ijleo.2019.03.103
M3 - Article
AN - SCOPUS:85063597868
SN - 0030-4026
VL - 185
SP - 208
EP - 214
JO - Optik
JF - Optik
ER -