TY - JOUR
T1 - Radially Polarized Orbital Angular Momentum Beam Emitter Based on Shallow-Ridge Silicon Microring Cavity
AU - Li, Rui
AU - Feng, Xue
AU - Zhang, Dengke
AU - Cui, Kaiyu
AU - Liu, Fang
AU - Huang, Yidong
N1 - Publisher Copyright:
© 2009-2012 IEEE.
PY - 2014/6/1
Y1 - 2014/6/1
N2 - Radially polarized orbital angular momentum (OAM) beams could be applied in optical manipulation and optical microscopy. An integrated OAM beam emitter with radially polarized radiation is proposed on shallow-ridge silicon microring with azimuthally distributed gratings etched on top of the ring waveguide. Two key structural parameters, the number of grating elements, and the dimension of each grating element are optimized by considering both the OAM order purity (Cp) and the total radiation efficiency (ηall). With elaborate design, Cp = ∼98%, ηall = ∼49% are achieved by simulations, and the calculated energy ratio between the far-field radially and azimuthally polarized component is more than 11 dB, which indicates that the radially polarized component is predominant in the radiated electromagnetic field.
AB - Radially polarized orbital angular momentum (OAM) beams could be applied in optical manipulation and optical microscopy. An integrated OAM beam emitter with radially polarized radiation is proposed on shallow-ridge silicon microring with azimuthally distributed gratings etched on top of the ring waveguide. Two key structural parameters, the number of grating elements, and the dimension of each grating element are optimized by considering both the OAM order purity (Cp) and the total radiation efficiency (ηall). With elaborate design, Cp = ∼98%, ηall = ∼49% are achieved by simulations, and the calculated energy ratio between the far-field radially and azimuthally polarized component is more than 11 dB, which indicates that the radially polarized component is predominant in the radiated electromagnetic field.
KW - Optical orbital angular momentum (OAM)
KW - radial polarization
KW - shallow-ridge microring
UR - https://www.scopus.com/pages/publications/84958818790
U2 - 10.1109/JPHOT.2014.2321757
DO - 10.1109/JPHOT.2014.2321757
M3 - 文章
AN - SCOPUS:84958818790
SN - 1943-0655
VL - 6
JO - IEEE Photonics Journal
JF - IEEE Photonics Journal
IS - 3
M1 - 2200710
ER -