Highly anisotropic metasurface: a polarized
beam splitter and hologram
Jun Zheng, Zhi Cheng Ye, Nan Ling Sun, Rui Zhang, Zheng Ming Sheng, Han Ping D. Shieh, and Jie
Zhang
600
40
500
20
wavelength [nm]
800
20
40
60
80
incident angle [deg]
(b1)
0
700
60
600
40
500
400
0
20
20
40
60
80
incident angle [deg]
700
0
1
500
NRTM/NRTE
2
1.5
600
800 800
0.5
700
700
600
100
700
60
600
40
500
400
0
0
60
20
20
40
60
80
incident angle [deg]
RTE/RTM
(b3)
800
700 620
600
50 55
10^6
10^5
10^4
10^3
10^2
0
100
80
60
600
40
500
20
20
20
40
60
80
incident angle [deg]
80
40
640
80
100
(a3)
500
20
40
60
80
incident angle [deg]
(b2)
40 60 80
10^6
10^5
10^4
10^3
10^2
600
400
0
400
0
100 800
80
TE
(a2)
wavelength [nm]
60
800
wavelength [nm]
80
700
400
0
R
[%]
100
wavelength [nm]
NR
[%]
TM
(a1)
wavelength [nm]
wavelength [nm]
800
400
0
20
40
60
80
incident angle [deg]
0
Supplementary Figure 1. Simulated spectra for a grating with a pitch of 420 nm and
a slit width of 100 nm. (a1)-(a3) Simulated NR spectra for (a1) TM light and (a2) TE
light and (a3) the extinction ratio of NRTM/NRTE. (b1)- (b3) Simulated reflection
spectra for (b1) TM light and (b2) TE light and (b3) the extinction ratio of RTE/RTM.
(a)
incident
TE/TM light
TE
TM
RTE
20o
NRTM
(b)
incident
TE/TM light
TE
TM
NRTM
30o
RTE
Supplementary Figure 2. Diffraction images for TE and TM light with incident
angles of (a) 20o and (b) 30o. Generally, the intensity of the diffracted TE light is
weaker than that of TM light, especially for longer wavelengths. For an incident angle
of 20o, as shown in (a), there are green and blue bands in the TM case, while there is
only a weak blue band for the TE light. When the incident angle is increased to 30o,
the maximum diffraction occurs at red wavelengths for TM light, as shown in (b),
while only green light appears and red light disappears for the TE polarized light.
40
500
20
wavelength [nm]
800
20
40
60
80
incident angle [deg]
(b1)
700
80
600
40
20
400
0
20
40
60
80
incident angle [deg]
1.5
600
1
500
100 800
60
500
700
400
0
0
0
2
10^6
560
10^5
700 530
10^4
500
10^3
600 47050 70 9010^2
400
0
100
80
60
600
40
500
20
40
60
80
incident angle [deg]
RTE/RTM
10^6
10^5
(b3)
800
700
470
600 450
55 60
10^4
10^3
10^2
500
0
60
400
0
0
100
80
60
40
20
20
20
40
60
80
incident angle [deg]
80
20
20
40
60
80
incident angle [deg]
(b2)
100
40
500
0.5
700
400
0
NRTM/NRTE
(a3)
800
wavelength [nm]
60
600
400
0
R
[%]
80
TE
(a2)
wavelength [nm]
700
100 800
wavelength [nm]
NR
[%]
wavelength [nm]
(a1)
wavelength [nm]
TM
800
20
40
60
80
incident angle [deg]
0
Supplementary Figure 3. Simulated spectra for a 280-nm-pitch grating. (a1)-(a3)
Simulated NR spectra for (a1) TM light and (a2) TE light and (a3) the extinction ratio
of NRTM/NRTE. (b1)-(b3) Simulated reflection spectra for (b1) TM light and (b2) TE
light and (b3) the extinction ratio of RTE/RTM. The dielectric grating in the device was
fabricated by laser interference, with an Al thickness of 50 nm.