scholarly journals Silicon Photonic Polarization Multiplexing Sensor with Both Large Range and High Resolution

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5870
Author(s):  
Shaojie Yin ◽  
Xiaoyan Wang ◽  
Zhibin Wang ◽  
Sanshui Xiao ◽  
Xiaowei Guan
Keyword(s):  
Refractive Index ◽  
High Resolution ◽  
Large Range ◽  
Transverse Magnetic ◽  
Microring Resonator ◽  
Transverse Magnetic Mode ◽  
Silicon Photonic ◽  
Fabry Perot ◽  
Polarization Multiplexing ◽  
Index Unit

A silicon photonic polarization multiplexing (PM) sensor featuring both a large range and a high resolution is proposed and experimentally demonstrated. The sensor includes a Fabry–Pérot (FP) resonator and a microring resonator (MRR) functioning as the sensing parts. With PM technology, the FP resonator only works on the transverse-electric mode while the MRR only on the transverse-magnetic mode. Thus, the proposed sensor can simultaneously achieve a large range with a short FP resonator and a high resolution with a high-Q MRR. Measured results show a range of 113 °C and a resolution of 0.06 °C for temperature sensing, and a range of 0.58 RIU (refractive index unit) with the resolution of 0.002 RIU for analyte refractive index sensing.

FINITE ELEMENT ANALYSIS OF TE AND TM MODES IN NONLINEAR PLANAR WAVEGUIDES

1994 ◽  
Vol 03 (01) ◽  
pp. 101-116 ◽  
Author(s):  
M. ZOBOLI ◽  
S. SELLERI
Keyword(s):  
Finite Element ◽  
Refractive Index ◽  
Transverse Magnetic ◽  
Planar Waveguides ◽  
Mode Analysis ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Transverse Magnetic Mode ◽  
Solution Convergence ◽  
Index Distribution

A general approach based on the finite element method for analyzing optical waves guided by dielectric planar waveguides with arbitrary nonlinear media and with arbitrary refractive index distribution is considered. A complete transverse-electric and transverse-magnetic mode analysis is presented and TM polarization solutions are obtained without approximations on the biaxial nature of the nonlinear refractive index. Solution convergence and stability is discussed and both film-guided and surface-guided modes are presented for symmetrical and asymmetrical structures. Bistability and hysteresis phenomena have been investigated for TE as well as for TM modes.

scholarly journals Compact Inner-Wall Grating Slot Microring Resonator for Label-Free Sensing

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 5038 ◽  
Author(s):  
Hongjun Gu ◽  
He Gong ◽  
Chunxue Wang ◽  
Xiaoqiang Sun ◽  
Xibin Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sodium Chloride ◽  
High Sensitivity ◽  
Microring Resonator ◽  
Silicon On Insulator ◽  
Label Free ◽  
Detection Range ◽  
Sodium Chloride Solutions ◽  
Sensing Application ◽  
Index Unit

In this paper, we present and analyze a compact inner-wall grating slot microring resonator (IG-SMRR) with the footprint of less than 13 μm × 13 μm on the silicon-on-insulator (SOI) platform for label-free sensing, which comprises a slot microring resonator (SMRR) and inner-wall grating (IG). Its detection range is significantly enhanced without the limitation of the free spectral region (FSR) owing to the combination of SMRR and IG. The IG-SMRR has an ultra-large quasi-FSR of 84.5 nm as the detection range, and enlarged factor is up to over 3 compared with the conventional SMRR. The concentration sensitivities of sodium chloride solutions and D-glucose solutions are 996.91 pm/% and 968.05 pm/%, respectively, and the corresponding refractive index (RI) sensitivities are 559.5 nm/RIU (refractive index unit) and 558.3 nm/RIU, respectively. The investigation on the combination of SMRR and IG is a valuable exploration of label-free sensing application for ultra-large detection range and ultra-high sensitivity in future.

scholarly journals Perancangan dan Simulasi Microring Resonator Optik dengan Variasi Indeks Bias Cladding untuk Aplikasi Sensor Amonia pada Air Tambak

2019 ◽  
Author(s):  
Fahmi Juliansyah ◽  
Gandi Sugandi ◽  
Lilik Hasanah
Keyword(s):  
Water Quality ◽  
Refractive Index ◽  
Ammonia Concentration ◽  
Microring Resonator ◽  
Ammonia Sensor ◽  
Refractive Index Unit ◽  
Waveguide Width ◽  
Ring Radius ◽  
Index Unit ◽  
Higher Sensitivity

Kualitas air merupakan faktor yang sangat penting dalam budidaya perikanan. Salah satu faktor yang mempengaruhi kualitas air adalah konsentrasi amonia. Oleh karena itu dalam budi daya perikanan dibutuhkan sensor amonia untuk memantau konsentrasi amonia. Sensor berbasis optical microring resonator optik (MRRO) telah menarik banyak perhatian karena ukurannya yang sangat kecil dan sensitifitasnya yang lebih tinggi dibandingkan sensor lain. Dalam penelitian ini telah dirancang dan disimulasikan sensor amonia berbasis MRRO dengan jari-jari ring 5 μm, lebar waveguide 0,1 μm dan gap 0,1 μm. Sensor menunjukkan linearitas yang sangat baik dengan sensitifitas sensor sebesar 168,82 nm/RIU (refractive index unit) dan 0,0973 nm/% amonia dalam air, dan batas deteksi 0,1% konsentrasi amonia dalam air.Water quality is a very important factor in aquaculture. One of the factor that determines water quality is ammonia concentration. Therefore, in aquaculture ammonia sensor is needed to monitor ammonia concentration. Optical microring-resonator(OMRR)-based sensors have gained a lot of interest because of it’s small size and higher sensitivity compared to other sensors. In this research, an OMRR-based ammonia sensor with ring radius of 5 μm, waveguide width of 0,1 μm, and gap of 0,1 μm has been designed and simulated. The sensor showing a very good linearity with sensor’s sensitivity of 168,82 nm/RIU (refractive index unit) and 0,0973 nm/% ammonia in the water, and detection limit of 0,1% ammonia on the water.

Microring Resonator Chemical Sensor Based on Si3N4 Waveguides

2011 ◽  
Vol 199-200 ◽  
pp. 1954-1957
Author(s):  
Yao Chen
Keyword(s):  
Refractive Index ◽  
Optical Characteristic ◽  
Chemical Sensor ◽  
High Sensitivity ◽  
Microring Resonator ◽  
Q Factor ◽  
Free Spectrum ◽  
Cmos Compatible ◽  
Liquid Sensing ◽  
Index Unit

Microring resonator based on Si3N4 waveguides was fabricated by using CMOS compatible processes with 1 µm wide waveguides and 200 µm in radius. The optical characteristic of the resonator was measured with a Q factor up to 20,000 and a free spectrum range (FSR) of 1 nm. The structure was further packaged to be a sensor for liquid sensing. Finally, the sensor was applied to detect concentrations of glucose solutions with sensitivity of 1.78×10-5 refractive index unit (RIU), which proves its functionality and feasible application as high sensitivity chemical sensor.

scholarly journals Tilted Nano-Grating Based Ultra-Compact Broadband Polarizing Beam Splitter for Silicon Photonics

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2645
Author(s):  
Haipeng Liu ◽  
Jijun Feng ◽  
Jinman Ge ◽  
Shanqing Zhuang ◽  
Shuo Yuan ◽  
...  
Keyword(s):  
Silicon Photonics ◽  
Beam Splitter ◽  
Extinction Ratio ◽  
Transverse Magnetic ◽  
Proof Of Concept ◽  
Coupling Region ◽  
Transverse Magnetic Mode ◽  
Practical Applications ◽  
Silicon Photonic ◽  
Polarizing Beam Splitter

An ultra-compact broadband silicon polarizing beam splitter is proposed based on a tilted nano-grating structure. A light cross coupling can be realized for transverse-magnetic mode, while the transverse-electric light can almost completely output from the through port. The length of the coupling region is only 6.8 μm, while an extinction ratio of 23.76 dB can be realized at a wavelength of 1550 nm. As a proof of concept, the device was fabricated by a commercial silicon photonic foundry. It can realize a 19.84 dB extinction ratio and an 80 nm working bandwidth with an extinction ratio of larger than 10 dB. The presented device also shows a good fabrication tolerance to the structure deviations, which is favorable for its practical applications in silicon photonics.

Large-range refractive index measurement method for open cavity Fabry–Pérot interferometer

2019 ◽  
Vol 30 (3) ◽  
pp. 035101
Author(s):  
Cheng Zhang ◽  
Dan Yang ◽  
Changyun Miao ◽  
Junfa Zhao ◽  
Hongqiang Li ◽  
...  
Keyword(s):  
Refractive Index ◽  
Measurement Method ◽  
Large Range ◽  
Open Cavity ◽  
Refractive Index Measurement ◽  
Index Measurement ◽  
Fabry Perot

scholarly journals Graphene-based tunable hyperbolic microcavity

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Michał Dudek ◽  
Rafał Kowerdziej ◽  
Alessandro Pianelli ◽  
Janusz Parka
Keyword(s):  
Resonant Mode ◽  
Transverse Magnetic ◽  
Mid Infrared ◽  
Nanophotonic Devices ◽  
Wide Range ◽  
Fabry Perot ◽  
Hyperbolic Dispersion ◽  
Low Threshold ◽  
Infrared Frequencies ◽  
Infrared Wave

AbstractGraphene-based hyperbolic metamaterials provide a unique scaffold for designing nanophotonic devices with active functionalities. In this work, we have theoretically demonstrated that the characteristics of a polarization-dependent tunable hyperbolic microcavity in the mid-infrared frequencies could be realized by modulating the thickness of the dielectric layers, and thus breaking periodicity in a graphene-based hyperbolic metamaterial stack. Transmission of the tunable microcavity shows a Fabry–Perot resonant mode with a Q-factor > 20, and a sixfold local enhancement of electric field intensity. It was found that by varying the gating voltage of graphene from 2 to 8 V, the device could be self-regulated with respect to both the intensity (up to 30%) and spectrum (up to 2.1 µm). In addition, the switching of the device was considered over a wide range of incident angles for both the transverse electric and transverse magnetic modes. Finally, numerical analysis indicated that a topological transition between elliptic and type II hyperbolic dispersion could be actively switched. The proposed scheme represents a remarkably versatile platform for the mid-infrared wave manipulation and may find applications in many multi-functional architectures, including ultra-sensitive filters, low-threshold lasers, and photonic chips.

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