scholarly journals Nanowire Oligomer Waveguide Modes towards Reduced Lasing Threshold

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5510
Author(s):  
Henrik Mäntynen ◽  
Nicklas Anttu ◽  
Harri Lipsanen
Keyword(s):  
Coating Layer ◽  
Gain Medium ◽  
Semiconductor Nanowires ◽  
Lasing Threshold ◽  
Modal Properties ◽  
Waveguide Modes ◽  
Fabry Perot ◽  
Index Contrast ◽  
Modal Field ◽  
Nanowire Lasers

Semiconductor nanowires offer a promising route of realizing nanolasers for the next generation of chip-scale optoelectronics and photonics applications. Established fabrication methods can produce vertical semiconductor nanowires which can themselves act both as a gain medium and as a Fabry–Pérot cavity for feedback. The lasing threshold in such nanowire lasers is affected by the modal confinement factor and end facet reflectivities, of which the substrate end reflectivity tends to be limited due to small refractive index contrast between the nanowire and substrate. These modal properties, however, also depend strongly on the modal field profiles. In this work, we use numerical simulations to investigate waveguide modes in vertical nanowire oligomers (that is, arrangements of few vertical nanowires close to each other) and their modal properties compared to single nanowire monomers. We solve for the oligomer waveguide eigenmodes which are understood as arising from interaction of monomer modes and further compute the reflectivity of these modes at the end facets of the nanowires. We consider either the nanowires or an additional coating layer as the gain medium. We show that both types of oligomers can exhibit modes with modal properties leading to reduced lasing threshold and also give directions for further research on the topic.

Effect of particle on the lasing threshold of optofluidic laser based on Fabry–Pérot microcavity

2020 ◽  
Vol 460 ◽  
pp. 125161 ◽  
Author(s):  
Jingdong Chen ◽  
Yating Song ◽  
Tingting Zhang ◽  
Wenjie Wang ◽  
Shaoding Liu
Keyword(s):  
Lasing Threshold ◽  
Fabry Perot

Analysis of Novel Building Blocks for Photonic MEMS Based on Deep 1D Photonic Crystals

2009 ◽  
Vol 74 ◽  
pp. 55-58
Author(s):  
M. Malak ◽  
F. Duport ◽  
Hong Cai ◽  
B. Saadany ◽  
P. Nicole ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Building Blocks ◽  
Wavelength Dependence ◽  
Gain Medium ◽  
Tunable Lasers ◽  
Thin Layers ◽  
Continuous Mode ◽  
Fabry Perot ◽  
Mode Hopping ◽  
Potential Use

This papers deals with the study of novel building blocks suitable for architectures of MEMS tunable lasers integrated in SOI platforms. These building blocks are based on the use of 1D photonic crystals (1D PCs) made of silicon-air thin layers stacks. These provide high reflectivity in certain wavelength range as well as access to simple Fabry-Perot cavities. The latter was studied more in detail and simulations are presented along with preliminary experimental results. A tilted Fabry-Perot cavity was analyzed for its potential of mode selector to prevent for mode hopping and thus enable continuous mode tuning by control of separation gap. As 1D PCs exhibit dispersion characteristics, this behavior is analyzed as well for its potential use for compensation purposes of wavelength dependence of the refractive index in the III-V gain medium.

scholarly journals Nanowire Lasers

Nanophotonics ◽  
2015 ◽  
Vol 4 (1) ◽  
pp. 90-107 ◽  
Author(s):  
C. Couteau ◽  
A. Larrue ◽  
C. Wilhelm ◽  
C. Soci
Keyword(s):  
Data Storage ◽  
Optoelectronic Devices ◽  
Building Blocks ◽  
Semiconductor Nanowires ◽  
Stimulated Emission ◽  
Light Sources ◽  
Laser Systems ◽  
Material Choice ◽  
Low Threshold ◽  
Nanowire Lasers

Abstract:We review principles and trends in the use of semiconductor nanowires as gain media for stimulated emission and lasing. Semiconductor nanowires have recently been widely studied for use in integrated optoelectronic devices, such as light-emitting diodes (LEDs), solar cells, and transistors. Intensive research has also been conducted in the use of nanowires for subwavelength laser systems that take advantage of their quasione- dimensional (1D) nature, flexibility in material choice and combination, and intrinsic optoelectronic properties. First, we provide an overview on using quasi-1D nanowire systems to realize subwavelength lasers with efficient, directional, and low-threshold emission. We then describe the state of the art for nanowire lasers in terms of materials, geometry, andwavelength tunability.Next,we present the basics of lasing in semiconductor nanowires, define the key parameters for stimulated emission, and introduce the properties of nanowires. We then review advanced nanowire laser designs from the literature. Finally, we present interesting perspectives for low-threshold nanoscale light sources and optical interconnects. We intend to illustrate the potential of nanolasers inmany applications, such as nanophotonic devices that integrate electronics and photonics for next-generation optoelectronic devices. For instance, these building blocks for nanoscale photonics can be used for data storage and biomedical applications when coupled to on-chip characterization tools. These nanoscale monochromatic laser light sources promise breakthroughs in nanophotonics, as they can operate at room temperature, can potentially be electrically driven, and can yield a better understanding of intrinsic nanomaterial properties and surface-state effects in lowdimensional semiconductor systems.

scholarly journals An Acoustic Sensor Based on Active Fiber Fabry–Pérot Microcavities

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5760
Author(s):  
Xin-Xia Gao ◽  
Jin-Ming Cui ◽  
Ming-Zhong Ai ◽  
Yun-Feng Huang ◽  
Chuan-Feng Li ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Pumping ◽  
Oil And Gas ◽  
Low Cost ◽  
High Sensitivity ◽  
Laser Frequency ◽  
Gain Medium ◽  
Acoustic Sensor ◽  
Gas Leakage ◽  
Fabry Perot

We demonstrate an active acoustic sensor based on a high-finesse fiber Fabry–Pérot micro-cavity with a gain medium. The sensor is a compacted device lasing around 1535 nm by external optical pumping. The acoustic pressure acting on the sensor disturbs the emitted laser frequency, which is subsequently transformed to beat signals through a delay-arm interferometer, and directly detected by a photo-detector. In this configuration, the sensing device exhibits a high sensitivity of 2.6 V/Pa and a noise equivalent acoustic signal level of 230 μPa/Hz1/2 at a frequency of 4 kHz. Experimental results provide a wide frequency response from 100 Hz to 18 kHz. As the sensor works at communication wavelength and the output laser can be electrically tuned in the 10 nm range, a multi-sensor network can be easily constructed with the dense wavelength division multiplexing devices. Extra lasers or demodulators are unnecessary thus the proposed sensor is low cost and easy fabrication. The proposed sensor shows broad applications prospect in remote oil and gas leakage exploration, photo-acoustic spectrum detection, and sound source location.

scholarly journals Single-Mode Semiconductor Nanowire Lasers With Coupled Cavities

2021 ◽  
Vol 8 ◽  
Author(s):  
Salman Ullah ◽  
Sijie Pian ◽  
Fang Dai ◽  
Yilun Wang ◽  
Yaoguang Ma ◽  
...  
Keyword(s):  
High Efficiency ◽  
Single Mode ◽  
Semiconductor Nanowires ◽  
Research Progress ◽  
Light Sources ◽  
Semiconductor Nanowire ◽  
Practical Applications ◽  
Biological Studies ◽  
Different Types ◽  
Nanowire Lasers

Semiconductor nanowires are one of the most fascinating topics over the past few decades. As miniaturized coherent light sources, semiconductor nanowires have been attracting tremendous attention in recent years for scientific and technological interest as potential ultra-compact, low cost, high efficiency, and low power consumption. Among different types of lasers, one-dimensional nanowires are of great interest as a promising material for next-generation nanophotonics and nanoelectronics applications due to their unique optical and electrical properties. Semiconductor nanowire lasers with single-mode output are vital in a variety of practical applications ranging from signal processing, spectroscopy, displays, optical sensing, on-chip communications, and biological studies. This article reviews the basic technology and research progress of single-mode semiconductor nanowire lasers. Afterward, the key methods and development of the different types of coupling to achieved single-mode laser output are elaborated. Finally, the challenges faced by each scheme are summarized.

Tunable semiconductor laser based on interaction between strongly mismatched Fabry-Perot interferometer and waveguide modes

2010 ◽  
Author(s):  
Alexander A. Moiseev ◽  
Grigory V. Gelikonov ◽  
Eugene A. Mashcovitch ◽  
Valentine M. Gelikonov
Keyword(s):  
Semiconductor Laser ◽  
Waveguide Modes ◽  
Fabry Perot
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