TY - JOUR
T1 - Highly Sensitive Biochemical Sensor Based on Two-Layer Dielectric Loaded Plasmonic Microring Resonator
AU - Ma, Tao
AU - Yuan, Jinhui
AU - Sun, Lei
AU - Li, Feng
AU - Kang, Zhe
AU - Yan, Binbin
AU - Sang, Xinzhu
AU - Wang, Kuiru
AU - Wu, Qiang
AU - Liu, Heng
AU - Gao, Jinhui
AU - Yu, Chongxiu
N1 - The final publication is available at Springer via http://dx.doi.org/10.1007/s11468-016-0401-4
PY - 2017/10/5
Y1 - 2017/10/5
N2 - In this paper, we propose and design a highly sensitive optical biochemical sensor based on two-layer dielectric loaded surface plasmon polariton waveguide (TDLSPPW)-based microring resonator (MRR). By optimizing the structure parameters, the propagation length of the proposed waveguide is ~126 μm, which is about 3 times of that of the polymer dielectric loaded surface plasmon polariton waveguide (DLSPPW) reported. It is demonstrated that the TDLSPPW-based MRR is operated at the under-coupling state, along with the quality factor (Q) of 541.2 and extinction ratio (ER) of 12.2 dB. Moreover, the Q and ER are much more sensitive to the structure parameters of the waveguide, including the waveguide width w, total thickness t, and coupling gap Wgap, compared to the low refractive index (RI) layer thickness t2. The simulation results on the biochemical RI sensing show that the sensitivities of 408.7 and 276.4 nm/RIU for glucose concentration in urine and chemical gases can be achieved, respectively. It is believed that the proposed sensor has potential applications in photonic-integrated biochemical sensing.
AB - In this paper, we propose and design a highly sensitive optical biochemical sensor based on two-layer dielectric loaded surface plasmon polariton waveguide (TDLSPPW)-based microring resonator (MRR). By optimizing the structure parameters, the propagation length of the proposed waveguide is ~126 μm, which is about 3 times of that of the polymer dielectric loaded surface plasmon polariton waveguide (DLSPPW) reported. It is demonstrated that the TDLSPPW-based MRR is operated at the under-coupling state, along with the quality factor (Q) of 541.2 and extinction ratio (ER) of 12.2 dB. Moreover, the Q and ER are much more sensitive to the structure parameters of the waveguide, including the waveguide width w, total thickness t, and coupling gap Wgap, compared to the low refractive index (RI) layer thickness t2. The simulation results on the biochemical RI sensing show that the sensitivities of 408.7 and 276.4 nm/RIU for glucose concentration in urine and chemical gases can be achieved, respectively. It is believed that the proposed sensor has potential applications in photonic-integrated biochemical sensing.
KW - surface plasmon resonant
KW - optical waveguide
KW - dielectric-loaded plasmonic waveguide
U2 - 10.1007/s11468-016-0401-4
DO - 10.1007/s11468-016-0401-4
M3 - Article
SN - 1557-1955
VL - 12
SP - 1417
EP - 1424
JO - Plasmonics
JF - Plasmonics
IS - 5
ER -