scholarly journals Applications Of Tunable Mid-Infrared Plasmonic Square-Nanoring Resonator Based On Graphene Nanoribbon

2021 ◽  
Author(s):  
Morteza Janfaza ◽  
Mohammad Ali Mansouri-Birjandi ◽  
Alireza Tavousi
Keyword(s):  
Chemical Potential ◽  
Graphene Nanoribbons ◽  
Fdtd Method ◽  
Three Dimensional ◽  
Optical Computing ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Mid Infrared ◽  
Band Pass ◽  
Basic Blocks

Abstract In this work, different structures are designed based on graphene square-nanoring resonator (GSNR) and simulated by the three-dimensional finite-difference time-domain (3D-FDTD) method. Depending on the location and number of graphene nanoribbons (GNR), the proposed structures can be utilized as a band-pass filter, wavelength demultiplexer, or power splitter in the mid-infrared (MIR) wavelengths. The tunability of the suggested assemblies is easily controlled by changing the dimensions and/or the chemical potential of the GSNRs. Benefiting from the nanoscale and ultra-compact GNRs, these structures can be proposed as basic blocks for optical computing and signal processing in the MIR region.

Tunable mid-infrared plasmonic band-pass filter based on a single graphene sheet with cavities

2014 ◽  
Vol 116 (22) ◽  
pp. 224505 ◽  
Author(s):  
Hong-Ju Li ◽  
Ling-Ling Wang ◽  
Bin Sun ◽  
Zhen-Rong Huang ◽  
Xiang Zhai
Keyword(s):  
Graphene Sheet ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Mid Infrared ◽  
Band Pass

Plasmonic band-pass filter device using coupled asymmetric cross-shaped cavity

2017 ◽  
Vol 31 (01) ◽  
pp. 1750001 ◽  
Author(s):  
Xiao-Meng Geng ◽  
Si-Chen Mi ◽  
Tie-Jun Wang ◽  
Lin-Yan He ◽  
Chuan Wang
Keyword(s):  
Integrated Circuits ◽  
Fdtd Method ◽  
Optical Signal ◽  
Band Pass Filter ◽  
Peak Wavelength ◽  
Metal Insulator ◽  
Pass Filter ◽  
Metal Insulator Metal ◽  
Wavelength Filter ◽  
Band Pass

In this paper, a novel plasmonic band-pass filter by using the system consisting four waveguides and an asymmetric cross-shaped resonator is proposed. The plasmonic system is based on the metal–insulator–metal (MIM) structure which could overcome the diffraction limit and exhibit various promising applications. Here, we investigate the transmission spectra of the cross-shaped resonator by using finite-different-time-domain (FDTD) method and we find that the peak-wavelength on different ports show redshift or blueshift behaviors which are linearly changed with the length of cavity or the coupling distance. Moreover, the wavelength filter could be achieved and further applied in optical signal integrated circuits.

Tunable plasmonic band-pass filter based on Fabry–Perot graphene nanoribbons

2017 ◽  
Vol 123 (10) ◽  
Author(s):  
Morteza Janfaza ◽  
Mohammad Ali Mansouri-Birjandi ◽  
Alireza Tavousi
Keyword(s):  
Graphene Nanoribbons ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Fabry Perot ◽  
Band Pass

scholarly journals Improve Temporal Fourier Transform Profilometry for Complex Dynamic Three-Dimensional Shape Measurement

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 1808
Author(s):  
Yihang Liu ◽  
Qican Zhang ◽  
Haihua Zhang ◽  
Zhoujie Wu ◽  
Wenjing Chen
Keyword(s):  
Fourier Transform ◽  
High Speed ◽  
Three Dimensional ◽  
Reference Plane ◽  
Shape Measurement ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Fourier Transform Profilometry ◽  
Sharp Edges ◽  
Band Pass

The high-speed three-dimensional (3-D) shape measurement technique has become more and more popular recently, because of the strong demand for dynamic scene measurement. The single-shot nature of Fourier Transform Profilometry (FTP) makes it highly suitable for the 3-D shape measurement of dynamic scenes. However, due to the band-pass filter, FTP method has limitations for measuring objects with sharp edges, abrupt change or non-uniform reflectivity. In this paper, an improved Temporal Fourier Transform Profilometry (TFTP) algorithm combined with the 3-D phase unwrapping algorithm based on a reference plane is presented, and the measurement of one deformed fringe pattern producing a new 3-D shape of an isolated abrupt objects has been achieved. Improved TFTP method avoids band-pass filter in spatial domain and unwraps 3-D phase distribution along the temporal axis based on the reference plane. The high-frequency information of the measured object can be well preserved, and each pixel is processed separately. Experiments verify that our method can be well applied to a dynamic 3-D shape measurement with isolated, sharp edges or abrupt change. A high-speed and low-cost structured light pattern sequence projection has also been presented, it is capable of projection frequencies in the kHz level. Using the proposed 3-D shape measurement algorithm with the self-made mechanical projector, we demonstrated dynamic 3-D reconstruction with a rate of 297 Hz, which is mainly limited by the speed of the camera.

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