scholarly journals The Design and Research of a New Hybrid Surface Plasmonic Waveguide Nanolaser

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2230
Author(s):  
Yahui Liu ◽  
Fang Li ◽  
Cheng Xu ◽  
Zhichong He ◽  
Jie Gao ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Quality Factor ◽  
Dielectric Materials ◽  
Waveguide Structure ◽  
Plasmonic Waveguide ◽  
Propagation Loss ◽  
Future Application ◽  
Lasing Threshold ◽  
Mode Field ◽  
Hybrid Waveguide

Using the hybrid plasmonic waveguide (HPW) principle as a basis, a new planar symmetric Ag-dielectric-SiO2 hybrid waveguide structure is designed and applied to nanolasers. First, the effects on the electric field distribution and the characteristic parameters of the waveguide structure of changes in the material, the nanometer radius, and the dielectric layer thickness were studied in detail using the finite element method with COMSOL Multiphysics software. The effects of two different dielectric materials on the HPW were studied. It was found that the waveguide performance could be improved effectively and the mode propagation loss was reduced when graphene was used as the dielectric, with the minimum effective propagation loss reaching 0.025. Second, the gain threshold and the quality factor of a nanolaser based on the proposed hybrid waveguide structure were analyzed. The results showed that the nanolaser has a lasing threshold of 1.76 μm−1 and a quality factor of 109 when using the graphene dielectric. A low-loss, low-threshold laser was realized, and the mode field was constrained by deep sub-wavelength light confinement. This structure has broad future application prospects in the integrated optics field and provides ideas for the development of subminiature photonic devices and high-density integrated circuits.

scholarly journals Perovskite Hybrid Surface Plasmon Waveguide

2021 ◽  
Author(s):  
Wenchao Li ◽  
Jiawei Wu ◽  
Xin Li ◽  
Zhiquan Li
Keyword(s):  
Quality Factor ◽  
Surface Plasmon ◽  
Optical Field ◽  
Waveguide Structure ◽  
Design Parameters ◽  
Mode Field ◽  
Low Threshold ◽  
Waveguide Design ◽  
Laser Devices ◽  
Surface Plasmon Waveguide

Abstract A novel perovskite hybrid surface plasmon waveguide structure is designed. Established its physical model and introduced its theoretical basis in detail. Based on the finite element method, the mode characteristics, quality factor, and gain threshold of the waveguide structure are analyzed with geometric parameters. The results show that the optical field constraint of the waveguide can reach a good deep sub-wavelength level under the optimal operating wavelength of 1550nm. By adjusting the waveguide design parameters, the high quality factor, low energy loss, low threshold limit and ultra small effective mode field area are obtained. Compared with the hybrid waveguide structure proposed in the current research results, this structure has stronger optical field limiting ability and microcavity binding ability. The waveguide structure can provide theoretical and technical support for the development of new efficient nano laser devices, and has a good application prospect.

Study of mode performances of graphene-coated nanowire integrated with triangle wedge substrate

2018 ◽  
Vol 27 (02) ◽  
pp. 1850013 ◽  
Author(s):  
Di Wu ◽  
Jinping Tian ◽  
Rongcao Yang
Keyword(s):  
Integrated Circuits ◽  
Numerical Simulations ◽  
Strong Coupling ◽  
Dielectric Waveguide ◽  
Photonic Integrated Circuits ◽  
Natural Extension ◽  
Optical Devices ◽  
Plasmonic Waveguide ◽  
Propagation Loss ◽  
Light Confinement

A novel type of plasmonic waveguide, consisting of graphene-coated nanowire integrated with triangle wedge substrate and the low-index dielectric gap, is introduced for nanoscale field confinement. Numerical simulations indicate that extremely compact light confinement and low propagation loss can be obtained owing to the strong coupling between the graphene-coated nanowire and the tip of the triangle wedge substrate. Meanwhile, the proposed waveguide is quite tolerant to practical fabrication error for other geometry parameters. The graphene-based waveguide in this study is a natural extension of dielectric waveguide, and may be helpful to the studies and applications of nanoscale optical devices such as photonic integrated circuits and biosensors.

scholarly journals Freestanding bilayer plasmonic waveguide coupling mechanism for ultranarrow electromagnetic-induced transparency band generation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Li Yu ◽  
Yuzhang Liang ◽  
Shuwen Chu ◽  
Huixuan Gao ◽  
Qiao Wang ◽  
...  
Keyword(s):  
Electromagnetic Coupling ◽  
Transmission Band ◽  
Waveguide Structure ◽  
Plasmonic Waveguide ◽  
Plasmonic Nanostructures ◽  
Destructive Interference ◽  
Group Index ◽  
Coupling Mechanism ◽  
Induced Transparency ◽  
Electromagnetic Induced Transparency

AbstractStrong electromagnetic coupling among plasmonic nanostructures paves a new route toward efficient manipulation of photons. Particularly, plasmon-waveguide systems exhibit remarkable optical properties by simply tailoring the interaction among elementary elements. In this paper, we propose and demonstrate a freestanding bilayer plasmonic-waveguide structure exhibiting an extremely narrow transmission peak with efficiency up to 92%, the linewidth of only 0.14 nm and an excellent out of band rejection. The unexpected optical behavior considering metal loss is consistent with that of electromagnetic induced transparency, arising from the destructive interference of super-radiative nanowire dipolar mode and transversal magnetic waveguide mode. Furthermore, for slow light application, the designed plasmonic-waveguide structure has a high group index of approximately 1.2 × 105 at the maximum of the transmission band. In sensing application, its lowest sensing figure of merit is achieved up to 8500 due to the ultra-narrow linewidth of the transmission band. This work provides a valuable photonics design for developing high performance nano-photonic devices.

The Effects of Composition on the Spectral Loss Characteristics of SiGe Planar Waveguide Structures

1992 ◽  
Vol 281 ◽  
Author(s):  
Yang Zuoya ◽  
B. L. Weiss ◽  
G. Shao ◽  
F. Namavar
Keyword(s):  
Optical Properties ◽  
Planar Waveguide ◽  
Waveguide Structure ◽  
Propagation Loss ◽  
Band Edge ◽  
Optical Confinement ◽  
Structural And Optical Properties ◽  
Edge Absorption

ABSTRACTThe effect of the Si:Ge ratio in SiGe/Si heterostructures on the structural and optical properties of SiGe/Si planar waveguide are reported here for Ge concentrations from 1 to 33.6%. The high propagation loss at 1.15 pm is due to band edge absorption, which increases as the Ge concentration increases, while the loss at longer wavelengths (1.523 pm) increases with decreasing Si concentration, due to the reduced optical confinement of the waveguide structure.

scholarly journals Long Low-Loss-Litium Niobate on Insulator Waveguides with Sub-Nanometer Surface Roughness

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 910 ◽  
Author(s):  
Rongbo Wu ◽  
Min Wang ◽  
Jian Xu ◽  
Jia Qi ◽  
Wei Chu ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Integrated Circuits ◽  
Large Scale ◽  
Photonic Integrated Circuits ◽  
Surface Patterning ◽  
Propagation Loss ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Low Loss ◽  
Atomic Force

In this paper, we develop a technique for realizing multi-centimeter-long lithium niobate on insulator (LNOI) waveguides with a propagation loss as low as 0.027 dB/cm. Our technique relies on patterning a chromium thin film coated on the top surface of LNOI into a hard mask with a femtosecond laser followed by chemo-mechanical polishing for structuring the LNOI into the waveguides. The surface roughness on the waveguides was determined with an atomic force microscope to be 0.452 nm. The approach is compatible with other surface patterning technologies, such as optical and electron beam lithographies or laser direct writing, enabling high-throughput manufacturing of large-scale LNOI-based photonic integrated circuits.

An on-chip polarization splitter based on the radiation loss in the bending hybrid plasmonic waveguide structure

2017 ◽  
Vol 111 (10) ◽  
pp. 101105 ◽  
Author(s):  
Chengwei Sun ◽  
Kexiu Rong ◽  
Fengyuan Gan ◽  
Saisai Chu ◽  
Qihuang Gong ◽  
...  
Keyword(s):  
Waveguide Structure ◽  
Plasmonic Waveguide ◽  
Radiation Loss ◽  
Polarization Splitter ◽  
Hybrid Plasmonic Waveguide ◽  
On Chip

scholarly journals Study of a sub-wavelength scale plasmonic traveling wave amplifier with electrically pumped multiple quantum wells

2021 ◽  
Author(s):  
Ruijian Rao ◽  
Shuwen Chen ◽  
Bing Chen ◽  
Cheng Bai
Keyword(s):  
Quantum Wells ◽  
Traveling Wave ◽  
Propagation Loss ◽  
Multiple Quantum Wells ◽  
Field Size ◽  
Multiple Quantum ◽  
Mode Field ◽  
Electrically Pumped ◽  
Traveling Wave Amplifier ◽  
Sub Wavelength

Abstract We propose a hybrid gap plasmonic traveling wave amplifier (TWA) with electrically pumped multiple quantum wells (MQW). This TWA has deep sub-wavelength mode field scale and works at 1310nm window. For the polarization-independent amplification we design the InGaAlAs tensile-strain MQW. And we analyze this plasmonic TWA’s optical, electrical and thermal characteristics by finite element method. First we get the suitable trade-off point between the affordable mode propagation loss and moderate mode field size by adjusting the gap width and height. Second we find that the narrower the MQW, the higher the MQW local gain. Third, our device has good thermal performance as the plasmonic wave power is less than 5μw. Simulation results suggest that the independent polarization gain appears at 1317nm wavelength. And at this wavelength 3.60/cm mode gain and 161nm mode width are obtained as the 9.39kA/cm^2injection current and 10nm×240nm gap size.

Passive Components for RF-ICs

2012 ◽  
pp. 189-214
Author(s):  
Gianluca Cornetta ◽  
David J. Santos ◽  
José Manuel Vázquez
Keyword(s):  
Integrated Circuits ◽  
Quality Factor ◽  
Silicon Substrate ◽  
Supply Voltage ◽  
Magnetic Behavior ◽  
Low Noise ◽  
Low Noise Amplifiers ◽  
Fully Integrated ◽  
Core Elements ◽  
Low Supply Voltage

The modern wireless communication industry is demanding transceivers with a high integration level operating in the gigahertz frequency range. This, in turn, has prompted intense research in the area of monolithic passive devices. Modern fabrication processes now provide the capability to integrate onto a silicon substrate inductors and capacitors, enabling a broad range of new applications. Inductors and capacitors are the core elements of many circuits, including low-noise amplifiers, power amplifiers, baluns, mixers, and oscillators, as well as fully-integrated matching networks. While the behavior and the modeling of integrated capacitors are well understood, the design of an integrated inductor is still a challenging task since its magnetic behavior is hard to predict accurately. As the operating frequency approaches the gigahertz range, device nonlinearities, coupling effects, and skin effect dominate, making difficult the design of critical parameters such as the self-resonant frequency, the quality factor, and self and mutual inductances. However, despite the parasitic effects and the low quality-factor, integrated inductors still allow for the implementation of integrated circuits with improved performances under low supply voltage. In this chapter, the authors review the technology behind monolithic capacitors and inductors on silicon substrate for high-frequency applications, with major emphasis on physical implementation and modeling.

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