scholarly journals Nanowires Integrated to Optical Waveguides

2021 ◽  
Author(s):  
Ricardo Téllez-Limón ◽  
Rafael Salas-Montiel
Keyword(s):  
Optical Waveguides ◽  
Optical Filters ◽  
Photonic Devices ◽  
Light Sources ◽  
Dielectric Waveguides ◽  
Metallic Nanowires ◽  
Research Subjects ◽  
Periodic Arrays ◽  
On Chip ◽  
Physical Phenomena

Chip-scale integrated optical devices are one of the most developed research subjects in last years. These devices serve as a bridge to overcome size mismatch between diffraction-limited bulk optics and nanoscale photonic devices. They have been employed to develop many on-chip applications, such as integrated light sources, polarizers, optical filters, and even biosensing devices. Among these integrated systems can be found the so-called hybrid photonic-plasmonic devices, structures that integrate plasmonic metamaterials on top of optical waveguides, leading to outstanding physical phenomena. In this contribution, we present a comprehensive study of the design of hybrid photonic-plasmonic systems consisting of periodic arrays of metallic nanowires integrated on top of dielectric waveguides. Based on numerical simulations, we explain the physics of these structures and analyze light coupling between plasmonic resonances in the nanowires and the photonic modes of the waveguides below them. With this chapter we pretend to attract the interest of research community in the development of integrated hybrid photonic-plasmonic devices, especially light interaction between guided photonic modes and plasmonic resonances in metallic nanowires.

scholarly journals Nanowire Waveguides and Lasers: Advances and Opportunities in Photonic Circuits

2021 ◽  
Vol 8 ◽  
Author(s):  
Zhiyuan Gu ◽  
Qinghai Song ◽  
Shumin Xiao
Keyword(s):  
Cross Sections ◽  
Optical Sensors ◽  
Optical Switching ◽  
Photonic Devices ◽  
Current Status ◽  
Light Sources ◽  
Photonic Networks ◽  
Photonic Circuits ◽  
Aspect Ratios ◽  
On Chip

Due to their single-crystalline structures, comparatively large aspect ratios, tight optical confinement and smooth surfaces, nanowires have increasingly attracted research interests for both fundamental studies and technological applications in on-chip photonic devices. This class of nanostructures typically have cross-sections of 2~200 nm and lengths upwards of several micrometers, allowing for the bridging of the nanoscopic and macroscopic world. In particular, the lasing behaviors can be established from a nanowire resonator with positive feedback via end-facet reflection, making the nanowire a promising candidate in the next generation of optoelectronics. Consequently, versatile nanowire-based devices ranging from nanoscale coherent lasers, optical sensors, waveguides, optical switching, and photonic networks have been proposed and experimentally demonstrated in the past decade. In this article, significant progresses in the nanowire fabrication, lasers, circuits, and devices are reviewed. First, we focus on the achievements of nanowire synthesis and introduce the basics of nanowire optics. Following the cavity configurations and mode categories, then the different light sources consisting of nanowires are presented. Next, we review the recent progress and current status of functional nanowire devices. Finally, we offer our perspective of nanowires regarding their challenges and future opportunities in photonic circuits.

scholarly journals Sub-nanosecond light-pulse generation with waveguide-coupled carbon nanotube transducers

2017 ◽  
Vol 8 ◽  
pp. 38-44 ◽  
Author(s):  
Felix Pyatkov ◽  
Svetlana Khasminskaya ◽  
Vadim Kovalyuk ◽  
Frank Hennrich ◽  
Manfred M Kappes ◽  
...  
Keyword(s):  
Light Pulse ◽  
Optical Waveguides ◽  
High Speed ◽  
Pulse Generation ◽  
Light Sources ◽  
Light Emitters ◽  
Nanophotonic Devices ◽  
Decay Times ◽  
On Chip ◽  
Electrical Bias

Carbon nanotubes (CNTs) have recently been integrated into optical waveguides and operated as electrically-driven light emitters under constant electrical bias. Such devices are of interest for the conversion of fast electrical signals into optical ones within a nanophotonic circuit. Here, we demonstrate that waveguide-integrated single-walled CNTs are promising high-speed transducers for light-pulse generation in the gigahertz range. Using a scalable fabrication approach we realize hybrid CNT-based nanophotonic devices, which generate optical pulse trains in the range from 200 kHz to 2 GHz with decay times below 80 ps. Our results illustrate the potential of CNTs for hybrid optoelectronic systems and nanoscale on-chip light sources.

Photonic-Fluidic Integrated Microstructures for Sensor and Photonic Device Applications

2006 ◽  
Vol 951 ◽  
Author(s):  
Claire L. Callender ◽  
Patrick Dumais ◽  
Christopher J. Ledderhof ◽  
Julian P. Noad
Keyword(s):  
Optical Waveguides ◽  
Chemical Vapor ◽  
Photonic Devices ◽  
Sensor Applications ◽  
Directional Coupling ◽  
Device Applications ◽  
Silica Layers ◽  
Fabrication And Characterization ◽  
On Chip

ABSTRACTThe design, fabrication and characterization of liquid-filled microchannels embedded in silica layers and integrated with optical waveguides for applications in on-chip sensors and novel photonic devices are presented. These integrated microstructures are formed using plasma-enhanced chemical vapor deposition (PECVD), photolithography and reactive ion etching (RIE). Surface accessible fluid introduction ports have been developed, and microfluidic circuits including bends, T-junctions and splitters are demonstrated. Coupling of light from integrated solid silica waveguides via directional coupling or direct end-fire coupling into fluid filled channels has been achieved on-chip, and optical losses assessed experimentally and theoretically. Optimization of the microstructures for sensor applications and for novel photonic devices based on nonlinear and other optical properties of fluids in integrated liquid waveguide segments is discussed.

scholarly journals Multimode silicon photonics

Nanophotonics ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 227-247 ◽  
Author(s):  
Chenlei Li ◽  
Dajian Liu ◽  
Daoxin Dai
Keyword(s):  
Integrated Circuits ◽  
Silicon Photonics ◽  
Fundamental Mode ◽  
Optical Filters ◽  
Photonic Devices ◽  
Higher Order ◽  
Multimode Waveguide ◽  
Higher Order Modes ◽  
Silicon Photonic ◽  
On Chip

AbstractMultimode silicon photonics is attracting more and more attention because the introduction of higher-order modes makes it possible to increase the channel number for data transmission in mode-division-multiplexed (MDM) systems as well as improve the flexibility of device designs. On the other hand, the design of multimode silicon photonic devices becomes very different compared with the traditional case with the fundamental mode only. Since not only the fundamental mode but also the higher-order modes are involved, one of the most important things for multimode silicon photonics is the realization of effective mode manipulation, which is not difficult, fortunately because the mode dispersion in multimode silicon optical waveguide is very strong. Great progresses have been achieved on multimode silicon photonics in the past years. In this paper, a review of the recent progresses of the representative multimode silicon photonic devices and circuits is given. The first part reviews multimode silicon photonics for MDM systems, including on-chip multichannel mode (de)multiplexers, multimode waveguide bends, multimode waveguide crossings, reconfigurable multimode silicon photonic integrated circuits, multimode chip-fiber couplers, etc. In the second part, we give a discussion about the higher-order mode-assisted silicon photonic devices, including on-chip polarization-handling devices with higher-order modes, add-drop optical filters based on multimode Bragg gratings, and some emerging applications.

scholarly journals Topology Design of Digital Metamaterials for Ultra-Compact Integrated Photonic Devices Based on Mode Manipulation

2021 ◽  
Author(s):  
Han Ye ◽  
Yanrong Wang ◽  
Shuhe Zhang ◽  
Danshi Wang ◽  
Yumin Liu ◽  
...  
Keyword(s):  
Photonic Devices ◽  
Topology Design ◽  
Functional Region ◽  
Optical Interconnections ◽  
Silicon Waveguide ◽  
All Optical ◽  
On Chip ◽  
Mode Order

Precise manipulation of mode order in silicon waveguide plays a fundamental role in the on-chip all-optical interconnections and is still a tough task in design when the functional region is...

All-nanoparticle layer-by-layer coatings for Mid-IR on-chip gas sensing

2020 ◽  
Vol 56 (91) ◽  
pp. 14283-14286
Author(s):  
Diana Al Husseini ◽  
Junchao Zhou ◽  
Daniel Willhelm ◽  
Trevor Hastings ◽  
Gregory S. Day ◽  
...  
Keyword(s):  
Optical Waveguides ◽  
Gas Sensing ◽  
Layer By Layer ◽  
Precise Control ◽  
Nanoparticle Layer ◽  
Withdrawal Speed ◽  
Layer Deposition ◽  
Nanoparticle Coatings ◽  
On Chip

Functionalization of optical waveguides with submicron all-nanoparticle coatings significantly enhanced the detection of acetone. Such coatings were enabled via precise control of the substrate withdrawal speed using the layer-by-layer deposition.

scholarly journals Causes of Color in Minerals and Gemstones

2001 ◽  
Vol 9 (2) ◽  
pp. 14-17
Author(s):  
Paul F. Hlava
Keyword(s):  
Emission Spectrum ◽  
White Light ◽  
Emission Spectra ◽  
Light Sources ◽  
Physical Phenomena

The colors that one sees when looking at a mineral or gemstone are due to the response of that person's eye to the energies of the light, the emission spectrum of the illumination, and, most importantly, physical phenomena in the material that cause some colors to be absorbed while others are undisturbed or enhanced. It is beyond the scope of this article to do more than touch on the physiology of the eye that allows us to see colors. Likewise, we will not dwell on the emission spectra of various light sources. Rather, we will concentrate on the various ways in which materials, especially minerals and their heights of perfection, gemstones, produce color from white light.

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