4.6 Article

Effects of Buffer Layer on Structural Properties of Nonpolar (11(2)over-bar0)-Plane GaN Film

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Physics, Condensed Matter

Nonpolar Growth of GaN Films on Polar Sapphire Substrate Using Pulsed Laser Deposition: Investigation of Substrate Temperature Variation on the Quality of Films

Tahir Rajgoli et al.

Summary: This study reports the growth of GaN films along nonpolar crystallographic planes, especially s-plane, on c-Al2O3 substrate using pulsed laser deposition (PLD). The effects of substrate temperature on the structural and morphological properties along this plane were investigated using different techniques. The degree of crystallinity, surface roughness, etc. of the films were found to depend strongly on deposition conditions, such as the substrate temperature. Micro-Raman investigations revealed the presence of an unexpected phonon mode, E-1(LO), in the spectra for films deposited at high temperature, indicating nonpolar growth of GaN crystals and high density of defects and/or plasmon coupling in the films. The photoluminescence spectra showed strong near-band-edge emission for all specimens, suggesting moderate optical properties of the films.

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS (2023)

Article Physics, Multidisciplinary

Epitaxial Growth and Characteristics of Nonpolar a-Plane InGaN Films with Blue-Green-Red Emission and Entire In Content Range

Jianguo Zhao et al.

Summary: Nonpolar InxGa1-xN epilayers with the entire In content range were successfully grown on nanoscale GaN islands. The surface morphology became gradually smoother with increasing In content, although the crystalline quality declined and phase separation occurred. Different photoluminescence wavelengths were achieved by varying In content. The carrier lifetime of the nonpolar InGaN film decreased, indicating a high-speed modulation bandwidth. The bowing coefficient for the bandgap energy as a function of In content was determined.

CHINESE PHYSICS LETTERS (2022)

Article Materials Science, Multidisciplinary

Deep-Ultraviolet LEDs Incorporated with SiO2-Based Microcavities Toward High-Speed Ultraviolet Light Communication

Huabin Yu et al.

Summary: This work reports a feasible approach to increase the light output power and bandwidth of a deep-ultraviolet LED for optical wireless communication. By embedding a SiO2-based microcavity with an aluminum reflector, photon escape from the LED is facilitated to enhance the light extraction efficiency, while the microcavity structure reduces the resistance-capacitance time constant and increases the modulation bandwidth. Experimental results demonstrate a significant enhancement in light output power and modulation bandwidth for the deep-ultraviolet LED with microcavities.

ADVANCED OPTICAL MATERIALS (2022)

Article Optics

Simultaneous ultraviolet, visible, and near-infrared continuous-wave lasing in a rare-earth-doped microcavity

Bo Jiang et al.

Summary: In this study, we fabricated a rare-earth-doped silica microsphere cavity with highest quality factor, achieving simultaneous and stable lasing in multiple bands under room temperature and continuous-wave pump. This high-Q doped microcavity holds great potential for multiband microlasers and other applications.

ADVANCED PHOTONICS (2022)

Review Optics

Silicon-based optoelectronics for general-purpose matrix computation: a review

Pengfei Xu et al.

Summary: Traditional electronic processors are nearing their limits in large-scale matrix computation, while silicon-based optoelectronic computation shows great potential by combining different devices and circuits. Matrix computation has the potential to outperform digital logic circuits in energy efficiency, computational power, and latency. The future of silicon-based optoelectronic matrix computation holds promise for significantly improving general-purpose matrix computation performance post-Moore's law era.

ADVANCED PHOTONICS (2022)

Article Physics, Applied

Defect effect on the performance of nonpolar GaN-based ultraviolet photodetectors

Yuhui Yang et al.

Summary: The anisotropy of GaN(11-20) enables the fabrication of polarized ultraviolet photodetectors for various applications. This study investigated how different defect densities, such as screw or mixed dislocations, edge dislocations, and basal stacking faults, affect the performance of GaN(11-20)-based PDs, impacting dark current, responsivity, and response time. The results showed that screw or mixed dislocations increase dark current, while edge dislocations and basal stacking faults decrease responsivity, and all three types of defects increase response time by creating traps for carrier recombination.

APPLIED PHYSICS LETTERS (2021)

Article Engineering, Electrical & Electronic

Improved Optical Properties of Nonpolar AlGaN-Based Multiple Quantum Wells Emitting at 280 nm

Jianguo Zhao et al.

Summary: The optical properties of nonpolar AlGaN multiple quantum wells emitting at 280 nm were improved by reducing the densities of superficial pits and basal-plane stacking faults through carefully optimized dual nitridation. This led to a significantly improved emission and an internal quantum efficiency of 39% for nonpolar Al0.43Ga0.57N MQWs at emission wavelength of 279 nm.

IEEE PHOTONICS JOURNAL (2021)

Review Optics

Progress on AlGaN-based solar-blind ultraviolet photodetectors and focal plane arrays

Qing Cai et al.

Summary: This paper comprehensively reviews the progress on AlGaN-based solar-blind UV PDs and FPAs, including basic physical properties of AlGaN, epitaxy and p-type doping issues, various types of PDs and the analysis of physical mechanisms for performance improvement. Recent advancements in imaging technologies used with AlGaN FPAs in recent years are also summarized.

LIGHT-SCIENCE & APPLICATIONS (2021)

Article Nanoscience & Nanotechnology

Three-dimensional monolithic micro-LED display driven by atomically thin transistor matrix

Wanqing Meng et al.

Summary: Low-temperature ultraclean integration of large-area MoS2 thin-film transistors with nitride micro-LEDs through a back end of line process enables high-resolution displays with excellent performance and uniformity. This integration shows the potential of MoS2 TFTs in driving micro LEDs to high luminance under low voltage, making them suitable for a range of display applications up to the high resolution and brightness limit.

NATURE NANOTECHNOLOGY (2021)

Article Optics

High-bandwidth InGaN/GaN semipolar micro-LED acting as a fast photodetector for visible light communications

Yun-Han Chang et al.

Summary: A green semipolar micro-light emitting diode has been proposed for high speed visible light communication, achieving a record data rate. The technology could support future wireless networks and Internet-of-Things with high density base stations, offering low cost, small footprint, and high integration of transmitters and receivers on the same platform.

OPTICS EXPRESS (2021)

Article Nanoscience & Nanotechnology

Designs of InGaN Micro-LED Structure for Improving Quantum Efficiency at Low Current Density

Shiqiang Lu et al.

Summary: A comprehensive numerical study on the operating behavior and physical mechanism of nitride micro-LED at low current density has been conducted, showing that reducing the number of quantum wells in the active region can enhance carrier matching and radiative recombination rate, leading to higher quantum efficiency and output power. The effectiveness of the electron blocking layer (EBL) for micro-LED is discussed, and it is found that removing the EBL can significantly improve electron confinement and hole injection, thereby enhancing the emission of micro-LED at low current density.

NANOSCALE RESEARCH LETTERS (2021)

Article Physics, Applied

Effects of an in-situ SiNx interlayer on structural and optical properties for nonpolar a-plane GaN epilayers

Jianguo Zhao et al.

JAPANESE JOURNAL OF APPLIED PHYSICS (2020)

Article Nanoscience & Nanotechnology

High-Bandwidth Green Semipolar (20-21) InGaN/GaN Micro Light-Emitting Diodes for Visible Light Communication

Sung-Wen Huang Chen et al.

ACS PHOTONICS (2020)

Article Engineering, Electrical & Electronic

High Modulation Bandwidth of Semipolar (11-22) InGaN/GaN LEDs with Long Wavelength Emission

Jack I. H. Haggar et al.

ACS APPLIED ELECTRONIC MATERIALS (2020)

Article Chemistry, Multidisciplinary

InGaN Platelets: Synthesis and Applications toward Green and Red Light-Emitting Diodes

Zhaoxia Bi et al.

NANO LETTERS (2019)

Review Materials Science, Multidisciplinary

A Decade of Nonpolar and Semipolar III-Nitrides: A Review of Successes and Challenges

Morteza Monavarian et al.

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE (2019)

Article Engineering, Electrical & Electronic

Effect of SiN Treatment on Optical Properties of In x Ga1-x N/GaN MQW Blue LEDs

Z. Benzarti et al.

JOURNAL OF ELECTRONIC MATERIALS (2017)

Article Physics, Applied

Recent progress and future prospects of AlGaN-based high-efficiency deep-ultraviolet light-emitting diodes

Hideki Hirayama et al.

JAPANESE JOURNAL OF APPLIED PHYSICS (2014)

Article Materials Science, Multidisciplinary

Improvement of crystal quality of nonpolar a-plane GaN by in-situ surface modification

Keun-Man Song et al.

MATERIALS LETTERS (2013)

Article Crystallography

Defect reduction processes in heteroepitaxial non-polar a-plane GaN films

Rui Hao et al.

JOURNAL OF CRYSTAL GROWTH (2011)

Article Engineering, Electrical & Electronic

Comparative Study on MOCVD Growth of a-Plane GaN Films on r-Plane Sapphire Substrates Using GaN, AlGaN, and AlN Buffer Layers

J. N. Dai et al.

JOURNAL OF ELECTRONIC MATERIALS (2009)

Article Physics, Condensed Matter

Surface morphology of [11(2)over-bar0] a-plane GaN growth by MOCVD on [1(1)over-bar02] r-plane sapphire

Xu Shengrui et al.

JOURNAL OF SEMICONDUCTORS (2009)

Article Physics, Applied

Basal plane stacking-fault related anisotropy in X-ray rocking curve widths of m-plane GaN

Melvin B. McLaurin et al.

JAPANESE JOURNAL OF APPLIED PHYSICS (2008)

Article Physics, Applied

Understanding nonpolar GaN growth through kinetic Wulff plots

Qian Sun et al.

JOURNAL OF APPLIED PHYSICS (2008)

Article Crystallography

Properties of non-polar a-plane GaN/AlGaN quantum wells

M. J. Kappers et al.

JOURNAL OF CRYSTAL GROWTH (2008)

Article Materials Science, Multidisciplinary

Anisotropic strain and phonon deformation potentials in GaN

V. Darakchieva et al.

PHYSICAL REVIEW B (2007)

Article Materials Science, Multidisciplinary

Polarized Raman scattering studies of nonpolar a-plane GaN films grown on r-plane sapphire substrates by MOCVD

Haiyong Gao et al.

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE (2006)

Article Engineering, Electrical & Electronic

Raman spectra of synthetic sapphire

M Kadleíková et al.

MICROELECTRONICS JOURNAL (2001)

Review Physics, Applied

Band parameters for III-V compound semiconductors and their alloys

I Vurgaftman et al.

JOURNAL OF APPLIED PHYSICS (2001)