概括
高工作温度的中波红外探测器对于减少尺寸和功率需求至关重要. 本研究介绍了一个InAsSb nBn焦平面阵列,在高温到230 K的高性能.
科学领域:
- 材料科学 材料科学 材料科学
- 光电学是指光电子产品.
- 半导体物理 半导体物理
背景情况:
- 提高中波长红外 (MWIR) 探测器的操作温度对于降低红外成像系统的尺寸,重量和功率 (SWaP) 是必不可少的.
- 传统的MWIR探测器通常需要冷冷却,这限制了它们的实际应用.
- 高工作温度 (HOT) 探测器的开发是红外传感的一个关键研究领域.
研究的目的:
- 报告和分析一个高工作温度的性能InAsSb nBn中波红外焦平面阵列 (FPA) 和光探测器.
- 评估ALS/AlSb超格子作为电子屏障对探测器性能的影响.
- 为了证明这些设备在SWaP受限的红外成像应用中的潜力.
主要方法:
- 制造InAsSb nBn光探测器和FPA,使用AlAs/AlSb超级网作为电子屏障.
- 光探测器性能的表征,包括黑暗电流密度,量子效率和在不同温度 (150K和300K) 的特定检测能力.
- 评估640x512 FPA的性能,包括操作性和噪声等效温度差 (NETD) 在150K.
主要成果:
- 在150K时,nBn光探测器的特定检测能力为1.94 x 10^12cm·Hz^1/2/W,在300K时为1.52 x 10^10cm·Hz^1/2/W.
- 640x512 FPA实现了99.5%的操作性和37.9mK的NETD在150K的f/1.6光学.
- 该InAsSb MWIR FPA在高达230 K的温度下进行了演示.
结论:
- 开发的InAsSb nBn MWIR FPA在高工作温度下表现出高性能.
- 这些HOT探测器为红外成像系统提供了有前途的解决方案,其SWaP要求较低.
- 该设备能够在高达230K的温度下运行,这显著扩大了它在各种热成像场景中的适用性.
相关概念视频
Gas Chromatography: Types of Detectors-II
330
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
330
IR Spectrometers
1.1K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
1.1K
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
186
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
186
Atomic Absorption Spectroscopy: Instrumentation
558
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
The atomizer used in AAS can be either a flame atomizer or an...
558


