Exploring Refractive Index Ultra Compact Nano Sensor Using Photonic Crystal Resonant Cavities

In this paper, an ultra-compact photonic crystal sensor based resonant cavities is proposed with improved quality factor, sensitivity and detection limit. The proposed sensor has 2D pillar photonic crystals with hexagonal array of dielectric rods. The refractive index of dielectric rods, radius of rods, filling factor (r/a) and lattice constant of the proposed structure are 3.46, 108 nm, 0.2 and 542 nm, respectively. The mean transmission efficiency, Quality factor, sensitivity, Figure of Merit (FOM) and limit of detection (LOD) are calculated as 92.2%, 9975.8, 371 nm/RIU, 2366 and 4.5 x 10-5 RIU, respectively. The corresponding electric field distributions and it band characteristics are studied using finite different time domain method (FDTD) and plan wave expansion (PWE). The cross-section of the proposed structure is 86 /xm2 and is desirable for photonic integrated circuits (PIC) and ultra-compact optical sensors.

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Design of Photonic Crystal-Based Demultiplexer with High-Quality Factor for DWDM Applications

Journal of Optical Communications ◽

10.1515/joc-2017-0058 ◽

2019 ◽

Vol 40 (2) ◽

pp. 135-138 ◽

Cited By ~ 3

Author(s):

Mahdi Zavvari

Keyword(s):

Photonic Crystal ◽

Quality Factor ◽

Transmission Efficiency ◽

High Quality Factor ◽

Selection Task ◽

Wavelength Selection ◽

High Quality ◽

Channel Spacing ◽

Resonant Cavities

Abstract In this article, we proposed a four-channel optical demultiplexer based on photonic crystal resonant cavities. For performing wavelength selection task, we used four resonant cavities with different lengths in order to choose four channels with different wavelengths. The average channel spacing of the structure is about 1 nm and the minimum transmission efficiency is 90 %. The bandwidths of the channels are the same and equal to 0.8 nm.

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Multimode-Interference-Based Waveguide Crossing in Two-Dimensional Cubic Photonic Crystal

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.284-287.2876 ◽

2013 ◽

Vol 284-287 ◽

pp. 2876-2879

Author(s):

Yih Bin Lin ◽

Jen Hao Cheng ◽

Rei Shin Chen ◽

Ting Chung Yu ◽

Ju Feng Liu ◽

...

Keyword(s):

Photonic Crystal ◽

Integrated Circuits ◽

Expansion Method ◽

Transmission Efficiency ◽

Multimode Interference ◽

Plane Wave Expansion Method ◽

Modal Dispersion ◽

Optical Integrated Circuits ◽

Difference Time ◽

Novel Design

A novel design of photonic crystal waveguide crossing based on multimode-interference (MMI) structure is proposed. Two structures of difference device lengths are simulated and studied. The proposed structures have high transmission efficiency for a wide bandwidth. The crosstalk is -26dB with device length of 12 lattice periods and -39dB with device length of 24 lattice periods. The plane wave expansion method and finite-difference time-domain method are used to calculate the modal dispersion curve and field propagation, respectively. The proposed MMI-based waveguide crossing has the potential to be practical in high-density optical integrated circuits.

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All-Metal Terahertz Metamaterial Biosensor for Protein Detection

10.21203/rs.3.rs-358182/v1 ◽

2021 ◽

Author(s):

Gangqi Wang ◽

Fengjie Zhu ◽

Tingting Lang ◽

Jianjun Liu ◽

Zhi Hong ◽

...

Keyword(s):

Stainless Steel ◽

Refractive Index ◽

Bovine Serum Albumin ◽

Figure Of Merit ◽

Limit Of Detection ◽

Protein Detection ◽

Cost Effective ◽

Detection Sensitivity ◽

Drilling Technology ◽

Simulation Results

Abstract In this paper, a terahertz (THz) biosensor based on all-metal metamaterial is theoretically investigated and experimentally verified. This THz metamaterial biosensor uses stainless steel materials that are manufactured via laser-drilling technology. The simulation results show that the maximum refractive index (RI) sensitivity and the figure of merit (FOM) of this metamaterial sensor are 294.95 GHz/RIU and 4.03, respectively. Then, bovine serum albumin (BSA) was chosen as the detection substance to assess this biosensor’s effectiveness. The experiment results show that the detection sensitivity is 72.81 GHz/(ng/mm2) and the limit of detection (LOD) is 0.035 mg/mL. This THz metamaterial biosensor is simple, cost-effective, easy to fabricate, and have great potential in various biosensing applications.

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Photonic Crystal Cavity with a Thin Low-Index Layer for Silicon-Compatible Nanolight Source

Applied Sciences ◽

10.3390/app8091552 ◽

2018 ◽

Vol 8 (9) ◽

pp. 1552 ◽

Cited By ~ 3

Author(s):

Youngsoo Kim ◽

Young Lee ◽

Seokhyeon Hong ◽

Kihwan Moon ◽

Soon-Hong Kwon

Keyword(s):

Photonic Crystal ◽

Integrated Circuits ◽

Quality Factor ◽

Wavelength Region ◽

High Quality Factor ◽

Silica Layer ◽

High Quality ◽

Light Emitting ◽

Telecommunication Wavelength ◽

Silicon Based

The development of an efficient silicon-based nanolight source is an important step for silicon-based photonic integrated circuits. We propose a high quality factor photonic crystal nanocavity consisting of silicon and silica, which can be used as a silicon-compatible nanolight source. We show that this cavity can effectively confine lights in a low-index silica layer with a high confinement factor of 0.25, in which rare-earth dopants can be embedded as gain materials. The cavity is optimized to have a high quality factor of 15,000 and a mode volume of 0.01 μm3, while the resonance has a wavelength of 1537 nm. We expect that the high confinement factor in the thin silica layer and the high quality factor of the proposed cavity enable the cavity to be a good candidate for silicon-compatible nanolight sources for use in nanolasers or light-emitting diodes in the telecommunication wavelength region.

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Computational Study of Photonic Crystal Resonator for Biosensor Application

Frequenz ◽

10.1515/freq-2019-0025 ◽

2019 ◽

Vol 73 (9-10) ◽

pp. 307-316

Author(s):

A. Benmerkhi ◽

M. Bouchemat ◽

T. Bouchemat

Keyword(s):

Refractive Index ◽

Photonic Crystal ◽

Quality Factor ◽

Computational Study ◽

Resonant Cavity ◽

Resonant Wavelength ◽

Two Dimensional ◽

Crystal Resonator ◽

Biosensor Application ◽

Cavity Characteristics

Abstract A two dimensional photonic crystal biosensor with high quality factor, transmission and sensitivity has been theoretically investigated using two dimensional finite difference time domain method (FDTD) and plane-wave expansion (PWE) approach. The studied biosensor consisted of two waveguide couplers and one microcavity formed by removing one air pore. Following analyte injection into the sensing holes and binding, the refractive index changes inducing a possible shift in the resonant wavelength. For the optimized structure, the biosensor quality factor is found to be over 49,767 and the obtained sensitivity is of order 15.2 nm/fg. Also, we investigated this structure in case of all air holes are applied as the functionalized holes with a sensitivity was found to be approximately equal to 292.46 nm∕RIU (refractive index units). According to the resonance cavity characteristics, the demultiplexing of different wavelengths can be achieved by regulating the radius of defects “r” inside the cavity. For this, A new design with 2D PCs for two-channel demultiplexer optofluidic biosensor has been proposed. The analysis shows that the response of each channel has a different resonant cavity wavelength and the filling of analyte in the selected holes cause resonant wavelength shifting, independently.

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