In this paper, the Fano resonance in the “eye-like” microring resonator system (EMRS) is theoretically and experimentally investigated. The asymmetric Fano-resonance line shape of EMRS is generated by adding a microring inside and coupling with the outer ring to produce a nonlinear phase shift. The EMRS was fabricated on silicon-on-insulator wafer by the complementary metal-oxide-semiconductor compatible process. Compared to the conventional single-stage microring add-drop filter structure, the maximum sharpness of the transmission of the drop port is enhanced 3 times, and the drop port extinction ratio is increased by about 20 dB. The experimental results are in good agreement with the theoretical analysis.

1.
S.
Xiao
,
M. H.
Khan
,
H.
Shen
, and
M.
Qi
,
J. Lightwave Technol.
26
,
228
(
2008
).
2.
N.
Sherwood-Droz
,
H.
Wang
,
L.
Chen
,
B. G.
Lee
,
A.
Biberman
,
K.
Bergman
, and
M.
Lipson
,
Opt. Express
16
,
15915
(
2008
).
3.
K. D.
Vos
,
I.
Bartolozzi
,
E.
Schacht
,
P.
Bienstman
, and
R.
Baets
,
Opt. Express
15
,
7610
(
2007
).
4.
C.
Chao
,
W.
Fung
, and
L.
Guo
,
IEEE J. Sel. Top. Quantum Electron.
22
,
134
(
2006
).
6.
L.
Zhang
,
M.
Song
,
T.
Wu
,
L.
Zou
,
R. G.
Beausoleil
, and
A. E.
Willner
,
Opt. Lett.
33
,
1978
(
2008
).
7.
L.
Tobing.
D.
Lim
,
P.
Dumon
,
R.
Baets
, and
M.
Chin
,
Appl. Phys. Lett.
92
,
101122
(
2008
).
8.
L.
Mario
,
S.
Darmawan
, and
M. K.
Chin
,
Opt. Express
14
,
12770
(
2006
).
9.
F.
Wang
,
X.
Wang
,
H.
Zhou
,
Y.
Hao
,
X.
Jiang
,
M.
Wang
, and
J.
Yang
,
Opt. Express
17
,
7708
(
2009
).
10.
B.
Li
,
Y.
Xiao
,
C.
Zou
,
X.
Jiang
,
Y.
Liu
,
F.
Sun
,
Y.
Li
, and
Q.
Gong
,
Appl. Phys. Lett.
100
,
021108
(
2012
).
11.
Q.
Huang
,
X.
Zhang
,
J.
Xia
, and
J.
Yu
,
Opt. Lett.
36
,
4494
(
2011
).
12.
A.
Yariv
,
IEEE Photonics Tech. Lett.
14
,
483
(
2002
).
14.
J. V.
Hryniewicz
,
P. P.
Absil
,
B. E.
Little
,
R. A.
Wilson
, and
P. T.
Ho
,
IEEE Photonics Technol. Lett.
12
,
320
(
2000
).
You do not currently have access to this content.