scholarly journals Subwavelength structured silicon waveguides and photonic devices

Nanophotonics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1321-1340
Author(s):  
Lu Sun ◽  
Yong Zhang ◽  
Yu He ◽  
Hongwei Wang ◽  
Yikai Su
Keyword(s):  
High Performance ◽  
Building Blocks ◽  
Photonic Devices ◽  
Subwavelength Structures ◽  
Silicon Waveguides ◽  
Slab Waveguides ◽  
Index Matching ◽  
Silicon Photonic ◽  
Wide Range ◽  
Optical Properties Of Materials

AbstractSubwavelength structures such as subwavelength gratings (SWGs) and subwavelength metamaterials are capable of tailoring the optical properties of materials and controlling the flow of light at the nanoscale. The effective indices of the subwavelength structured strip and slab waveguides can be changed in a wide range by choosing an appropriate duty cycle or a filling factor of silicon, which provides an effective method to manipulate the optical field and achieve effective index matching for functional devices. Recent advances in nanofabrication techniques have made it possible to implement subwavelength structures in silicon strip and slab waveguides. Here we review various approaches used to design subwavelength structures and achieve exotic optical responses and discuss how these structures can be used to realize high-performance silicon photonic devices. Both one-dimensional SWG devices and two-dimensional subwavelength metamaterial devices are covered in this review, including subwavelength structure–based polarization handling devices, mode manipulation devices, and building blocks for integrated optical interconnects. Perspectives on subwavelength structured silicon photonic devices are also discussed.

scholarly journals Novel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Esteban Gonzalez-Valencia ◽  
Ignacio Del Villar ◽  
Pedro Torres
Keyword(s):  
Optical Fibers ◽  
High Performance ◽  
Light Propagation ◽  
Fiber Optic ◽  
Layer Structure ◽  
Optical Network ◽  
Building Blocks ◽  
Bloch Wave ◽  
Nanophotonic Devices ◽  
Wide Range

AbstractWith the goal of ultimate control over the light propagation, photonic crystals currently represent the primary building blocks for novel nanophotonic devices. Bloch surface waves (BSWs) in periodic dielectric multilayer structures with a surface defect is a well-known phenomenon, which implies new opportunities for controlling the light propagation and has many applications in the physical and biological science. However, most of the reported structures based on BSWs require depositing a large number of alternating layers or exploiting a large refractive index (RI) contrast between the materials constituting the multilayer structure, thereby increasing the complexity and costs of manufacturing. The combination of fiber–optic-based platforms with nanotechnology is opening the opportunity for the development of high-performance photonic devices that enhance the light-matter interaction in a strong way compared to other optical platforms. Here, we report a BSW-supporting platform that uses geometrically modified commercial optical fibers such as D-shaped optical fibers, where a few-layer structure is deposited on its flat surface using metal oxides with a moderate difference in RI. In this novel fiber optic platform, BSWs are excited through the evanescent field of the core-guided fundamental mode, which indicates that the structure proposed here can be used as a sensing probe, along with other intrinsic properties of fiber optic sensors, as lightness, multiplexing capacity and easiness of integration in an optical network. As a demonstration, fiber optic BSW excitation is shown to be suitable for measuring RI variations. The designed structure is easy to manufacture and could be adapted to a wide range of applications in the fields of telecommunications, environment, health, and material characterization.

scholarly journals Fused heterocycle-based energetic materials (2012–2019)

2020 ◽  
Vol 8 (8) ◽  
pp. 4193-4216 ◽  
Author(s):  
Haixiang Gao ◽  
Qinghua Zhang ◽  
Jean'ne M. Shreeve
Keyword(s):  
Energetic Materials ◽  
High Performance ◽  
Building Blocks ◽  
Fused Heterocycles ◽  
Wide Range

Fused heterocycles are unique building blocks for the synthesis of a wide range of high-performance energetic materials.

scholarly journals Ultra-broadband silicon photonics devices based on subwavelength metamaterials -INVITED

2020 ◽  
Vol 238 ◽  
pp. 01002
Author(s):  
A. V. Velasco ◽  
D. González-Andrade ◽  
A. Herrero-Bermello ◽  
J. M. Luque-González ◽  
R. Halir ◽  
...  
Keyword(s):  
Optical Properties ◽  
Silicon Photonics ◽  
Building Blocks ◽  
Photonic Devices ◽  
Phase Shifters ◽  
Beam Splitters ◽  
Wide Range ◽  
Recent Developments ◽  
Photonics Devices

Subwavelength structured waveguides provide tailorable optical properties that can be leveraged to overcome bandwidth limitations in a wide range of photonic devices. In this invited talk, we present an overview of recent developments on subwavelength engineered building blocks, including phase shifters, mode multiplexers, polarization beam splitters and zero-birefringence waveguides.

scholarly journals Bidirectional Angle-Tolerant Polarization-Tuned Filtering and Wide-Range Refractive Index Sensing Based on Metal Film Coated Nanograting

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Wenli Cui ◽  
Qiannan Wu ◽  
Bo Chen ◽  
Xufeng Li ◽  
Xiaolin Luo ◽  
...  
Keyword(s):  
Refractive Index ◽  
Metal Film ◽  
High Performance ◽  
Incident Angle ◽  
Single Layer ◽  
Transverse Magnetic ◽  
Photonic Devices ◽  
Biomedical Sensors ◽  
Dual Channel ◽  
Wide Range

The miniaturization and integration of photonic devices are new requirements in the fast-growing optics field. In this paper, we focus on a feature-rich sub-wavelength nanograting-coated single-layer metal film. The numerical results show that the reflection behaviors of this proposed structure can realize bidirectional dual-channel ultra-narrowband polarized filtering and bidirectional wavelength-modulated sensing in a wide refractive index (RI) range from 1.0 to 1.4 for incident angle of 10° with transverse-magnetic (TM) polarized illumination at wavelengths between 550 nm to 1500 nm. Moreover, the bidirectional properties of filtering and sensing are not obviously decreased when increasing incident angle from 10° to 30°, and decreasing incident angle from 10° to 0°. The calculated RI sensitivity can be up to 592 nm/RIU with a high figure of merit (FOM) of 179.4 RIU−1. More to the point, this nanograting has a simple structure and is less sensitive to the height and shape of grating ridge, which provides great convenience for the fabrication of devices. The other thing that is going on is that this structure can also realize synchronously tunable color filtering, including green to red, with high color purity in the visible band by choosing the period. The underlying physical mechanism is analyzed in detail, and is primarily attributed to surface plasmon polariton (SPP) resonance and dipole resonance at double plasmon resonance wavelengths. This work has tremendous potential in developing multipurpose and high-performance integrated optical devices such as spectral filters, colored displays and plasmon biomedical sensors.

scholarly journals Recent Advances of the Polymer Micro/Nanofiber Fluorescence Waveguide

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1086 ◽  
Author(s):  
Hongyan Xia ◽  
Tingkuo Chen ◽  
Chang Hu ◽  
Kang Xie
Keyword(s):  
Optical Waveguide ◽  
High Performance ◽  
Building Blocks ◽  
Transmission Efficiency ◽  
Photonic Devices ◽  
Polymer Chains ◽  
Polymer Materials ◽  
Optical Wave ◽  
Integrated Optical ◽  
Photonic Components

Subwavelength optical micro/nanofibers have several advantages, such as compact optical wave field and large specific surface area, which make them widely used as basic building blocks in the field of micro-nano optical waveguide and photonic devices. Among them, polymer micro/nanofibers are among the first choices for constructing micro-nano photonic components and miniaturized integrated optical paths, as they have good mechanical properties and tunable photonic properties. At the same time, the structures of polymer chains, aggregated structures, and artificial microstructures all have unique effects on photons. These waveguided micro/nanofibers can be made up of not only luminescent conjugated polymers, but also nonluminous matrix polymers doped with luminescent dyes (organic and inorganic luminescent particles, etc.) due to the outstanding compatibility of polymers. This paper summarizes the recent progress of the light-propagated mechanism, novel design, controllable fabrication, optical modulation, high performance, and wide applications of the polymer micro/nanofiber fluorescence waveguide. The focus is on the methods for simplifying the preparation process and modulating the waveguided photon parameters. In addition, developing new polymer materials for optical transmission and improving transmission efficiency is discussed in detail. It is proposed that the multifunctional heterojunctions based on the arrangement and combination of polymer-waveguided micro/nanofibers would be an important trend toward the construction of more novel and complex photonic devices. It is of great significance to study and optimize the optical waveguide and photonic components of polymer micro/nanofibers for the development of intelligent optical chips and miniaturized integrated optical circuits.

scholarly journals Low-voltage high-performance silicon photonic devices and photonic integrated circuits operating up to 30 Gb/s

2011 ◽  
Vol 19 (27) ◽  
pp. 26936 ◽  
Author(s):  
Gyungock Kim ◽  
Jeong Woo Park ◽  
In Gyoo Kim ◽  
Sanghoon Kim ◽  
Sanggi Kim ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
High Performance ◽  
Low Voltage ◽  
Photonic Integrated Circuits ◽  
Photonic Devices ◽  
Silicon Photonic

scholarly journals 2D tellurene/black phosphorus heterojunctions based broadband nonlinear saturable absorber

Nanophotonics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 2593-2602 ◽  
Author(s):  
Bingzheng Yan ◽  
Guoru Li ◽  
Bingnan Shi ◽  
Junting Liu ◽  
Hongkun Nie ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Building Blocks ◽  
Photonic Devices ◽  
Black Phosphorus ◽  
Laser Generation ◽  
Saturable Absorption ◽  
Solid State Lasers ◽  
Saturable Absorbers ◽  
Nonlinear Optical Absorption ◽  
Wide Range

AbstractTwo-dimensional (2D) mono-elemental materials (Xenes) show remarkable potential in the fields of fundamental science and technology, have been regarded as a wide range of building blocks for electronic technologies due to their unique chemical, physical, electrical, and optical properties. Here, 2D tellurene/black phosphorus (Te/BP) heterojunctions are successfully fabricated through liquid-phase exfoliation (LPE) method. Their nonlinear optical absorption properties at 1.0, 2.0, and 2.8 μm have been studied by an open-aperture Z-scan method. The results revealed the excellent broadband saturable absorption responses of the prepared BP/Te heterojunctions, which are further confirmed by using them as saturable absorbers (SAs) for passively Q-switched all-solid-state lasers operating at 1.0, 2.0, and 2.8 μm, respectively. In particular, 1.04 μm continuous-wave (CW) mode-locked lasers with a pulse width of 404 fs is realized for the first time, to our best knowledge. Our work indicates that 2D Xenes especially 2D Xenes based heterojunctions have great potential in the fields of pulsed laser generation/modulation and other optoelectronic and photonic devices.

Sign in / Sign up

Export Citation Format

Share Document