High-efficiency couplers for graphene surface plasmon polaritons in the mid-infrared region

2020 ◽  
Vol 45 (2) ◽  
pp. 264 ◽  
Author(s):  
Longfang Ye ◽  
Kehan Sui ◽  
Hao Feng
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
High Efficiency ◽  
Infrared Region ◽  
Mid Infrared ◽  
Graphene Surface ◽  
Plasmon Polaritons

scholarly journals Optical Transport Properties of Graphene Surface Plasmon Polaritons in Mid-Infrared Band

Crystals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 354 ◽  
Author(s):  
Yindi Wang ◽  
Hongxia Liu ◽  
Shulong Wang ◽  
Ming Cai ◽  
Lan Ma
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Infrared Region ◽  
Transmission Characteristics ◽  
Infrared Band ◽  
Theoretical Derivation ◽  
Mid Infrared ◽  
Graphene Surface ◽  
Silicon Based ◽  
Plasmon Polaritons

The excellent transmission characteristics of graphene surface plasmon polaritons in mid-infrared band were analyzed and verified effectively through theoretical derivation and soft simulation in this paper. Meanwhile, a sandwich waveguide structure of dielectric–graphene–substrate–dielectric based on graphene surface plasmon polaritons (SPPs) was presented. Simulation results indicate that graphene SPPs show unique properties in the mid-infrared region including ultra-compact mode confinement and dynamic tunability, which allow these SPPs to overcome the defects of metal SPPs and traditional silicon-based optoelectronic devices. Thus, they can be used to manufacture subwavelength devices. The work in this paper lays a theoretical foundation for the application of graphene SPPs in the mid-infrared region.

scholarly journals Electrical Phase Control Based on Graphene Surface Plasmon Polaritons in Mid-infrared

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 576 ◽  
Author(s):  
Yindi Wang ◽  
Hongxia Liu ◽  
Shulong Wang ◽  
Ming Cai ◽  
Haifeng Zhang ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Phase Modulation ◽  
Driving Voltage ◽  
Mid Infrared ◽  
Graphene Surface ◽  
Multiple Wavelengths ◽  
Small Device ◽  
Phase Range ◽  
Plasmon Polaritons

Phase modulation of light is the core of many optoelectronic applications, such as electro-optic switch, sensors and modulators. Graphene Surface plasmon polaritons (SPPs) exhibit unique properties in phase modulation including dynamic tunability, a small driving voltage and small device size. In this paper, the novel phase modulation capability of graphene SPPs in mid-infrared are confirmed through theory and simulation. The results show that graphene SPPs can realize continuous tuning of the phase shift at multiple wavelengths in mid-infrared, covering the phase range from 0° to 360°. Based on these results, a sandwich waveguide structure of dielectric–graphene–dielectric with a device length of 800 nm is proposed, which shows up to 381° phase modulation range at an operating wavelength of 6.55 µm, given a 1 V driving voltage. In addition, the structure size is much shorter than the wavelength in mid-infrared and can realize sub-wavelength operation. This work paves the way to develop graphene-based tunable devices for mid-infrared wave-front control.

Efficient mid-infrared wavelength converter based on plasmon-enhanced nonlinear response in graphene nanoribbons

2021 ◽  
Author(s):  
Jiao Chi ◽  
Hongjun Liu ◽  
Zhaolu Wang ◽  
Nan Huang
Keyword(s):  
Graphene Sheet ◽  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Graphene Nanoribbons ◽  
Wavelength Converter ◽  
Third Order ◽  
Mid Infrared ◽  
Infrared Wavelength ◽  
Graphene Plasmons ◽  
Plasmon Polaritons

Abstract Graphene plasmons with enhanced localized electric field have been used for boosting the light-matter interaction in linear optical nano-devices. Meanwhile, graphene is an excellent nonlinear material for several third-order nonlinear processes. We present a theoretical investigation of the mechanism of plasmon-enhanced third-order nonlinearity susceptibility of graphene nanoribbons. It is demonstrated that the third-order nonlinearity susceptibility of graphene nanoribbons with excited graphene surface plasmon polaritons can be an order of magnitude larger than the intrinsic susceptibility of a continuous graphene sheet. Combining these properties with the relaxed phase matching condition due to the ultrathin graphene, we propose a novel plasmon-enhanced mid-infrared wavelength converter with arrays of graphene nanoribbons. The wavelength of sig-nal light is in mid-infrared range, which can excite the tunable surface plasmon polaritons in arrays of graphene nanoribbons. The efficiency of the converter from mid-infrared to near-infrared wavelength can be remarkably improved by 60 times compared with the graphene sheet without graphene plasmons. This work provides a novel idea for the efficient application of graphene in the nonlinear optical nano-devices. The proposed mid-infrared wavelength converter is compact, tunable and has promising potential in graphene-based mid-infrared detector with high detection efficiency.

scholarly journals A High Efficiency Band-Pass Filter Based on CPW and Quasi-Spoof Surface Plasmon Polaritons

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 4311-4317 ◽  
Author(s):  
Zhao-Min Chen ◽  
Yanhui Liu ◽  
Xinhua Liang ◽  
Jun Wang ◽  
Yuan Li ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
High Efficiency ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass ◽  
Plasmon Polaritons ◽  
Spoof Surface Plasmon Polaritons

scholarly journals A New Electro-Optical Switch Modulator Based on the Surface Plasmon Polaritons of Graphene in Mid-Infrared Band

Sensors ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 89 ◽  
Author(s):  
Ming Cai ◽  
Shulong Wang ◽  
Bo Gao ◽  
Yindi Wang ◽  
Tao Han ◽  
...  
Keyword(s):  
Energy Loss ◽  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Surface Plasmon Polariton ◽  
Modulation Depth ◽  
Optical Switch ◽  
Dielectric Structure ◽  
Infrared Band ◽  
Mid Infrared ◽  
Plasmon Polaritons

In this paper, a new electro-optical switch modulator based on the surface plasmon polaritons of graphene is proposed. An air–graphene-substrate–dielectric structure is adopted in the modulator. In this structure, the graphene is considered as a film of metal whose thickness tends to be infinitesimal. By changing the external voltage, the boundary conditions can be changed to decide whether the surface plasmon polariton waves can be excited in mid-infrared band. Because of this effect, the structure can be used as an electro–optical switch modulator, whose modulation depth is about 100% in theory. Finally, the 3 dB bandwidth (~34 GHz) and the energy loss (36.47 fJ/bit) of the electro–optical switch modulator are given, whose low energy loss is very suitable for engineering applications.

scholarly journals Optical Detection and Spatial Modulation of Mid-Infrared Surface Plasmon Polaritons in a Highly Doped Semiconductor

2017 ◽  
Vol 6 (3) ◽  
pp. 1700492 ◽  
Author(s):  
Davide Maria Di Paola ◽  
Anton V. Velichko ◽  
Mario Bomers ◽  
Nilanthy Balakrishnan ◽  
Oleg Makarovsky ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Optical Detection ◽  
Spatial Modulation ◽  
Mid Infrared ◽  
Plasmon Polaritons

Low-cost mid-infrared polarizer based on direct coupling to surface-plasmon polaritons

2020 ◽  
Author(s):  
Alireza Shahsafi ◽  
Jad Salman ◽  
Bryan E. Rubio Perez ◽  
Yuzhe Xiao ◽  
Chenghao Wan ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Low Cost ◽  
Direct Coupling ◽  
Mid Infrared ◽  
Plasmon Polaritons
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