threshold current density

简明释义

阈电淋度

英英释义

例句

1.In semiconductor lasers, the threshold current density 阈值电流密度 is a critical parameter that determines the onset of laser action.

在半导体激光器中，threshold current density 阈值电流密度 是决定激光作用开始的关键参数。

2.Engineers often measure the threshold current density 阈值电流密度 to optimize the performance of optoelectronic devices.

工程师们通常测量 threshold current density 阈值电流密度 以优化光电子设备的性能。

3.The threshold current density 阈值电流密度 is influenced by temperature and material properties.

温度和材料特性会影响 threshold current density 阈值电流密度。

4.Researchers aim to reduce the threshold current density 阈值电流密度 in new laser designs.

研究人员旨在在新激光设计中降低 threshold current density 阈值电流密度。

5.A lower threshold current density 阈值电流密度 can lead to more efficient laser diodes.

较低的 threshold current density 阈值电流密度 可以导致更高效的激光二极管。

作文

In the field of semiconductor physics, understanding the concept of threshold current density is crucial for the design and optimization of laser diodes and other optoelectronic devices. The threshold current density refers to the minimum current density that must be applied to a laser diode in order to initiate the process of stimulated emission of light. Below this critical point, the device operates in a non-lasing state, where spontaneous emission dominates and no coherent light is produced. This phenomenon is essential for engineers and scientists who aim to enhance the performance of lasers in various applications.The significance of threshold current density can be observed in its direct impact on the efficiency and output power of laser diodes. When the current density exceeds this threshold, the gain medium becomes sufficiently populated with excited electrons, allowing for the amplification of light. This transition marks the beginning of the lasing process, where a coherent beam of light is produced. Therefore, a lower threshold current density is generally desirable, as it indicates that the laser can achieve lasing conditions with less power input, leading to increased energy efficiency.Moreover, the threshold current density is influenced by various factors, including temperature, material composition, and device structure. For instance, as the temperature increases, the carrier density in the active region of the laser diode may change, affecting the threshold current density. Additionally, different semiconductor materials exhibit varying properties, which can lead to differences in the threshold current density required for lasing. Understanding these relationships allows researchers to tailor the design of laser diodes to specific applications, such as telecommunications, medical devices, and industrial laser systems.Another important aspect related to threshold current density is the role of quantum wells in modern laser diodes. Quantum wells are thin layers of semiconductor material where carriers are confined in one dimension, significantly enhancing the optical gain and reducing the threshold current density. By engineering the width and composition of these quantum wells, manufacturers can create laser diodes with improved performance characteristics, including lower operating currents and higher output powers.In summary, the concept of threshold current density is fundamental in the realm of laser technology. It not only determines the operational efficiency of laser diodes but also influences their design and application across various fields. A thorough understanding of this parameter enables engineers to innovate and develop more effective and efficient laser systems. As technology continues to advance, the ability to manipulate and reduce threshold current density will pave the way for the next generation of high-performance optoelectronic devices, ultimately benefiting numerous industries and applications worldwide.

在半导体物理学领域，理解阈值电流密度的概念对于激光二极管和其他光电设备的设计与优化至关重要。阈值电流密度是指必须施加到激光二极管上的最小电流密度，以启动刺激发光过程。在这个临界点以下，设备处于非激光状态，自发发射占主导地位，不会产生相干光。这一现象对旨在提高激光性能的工程师和科学家而言是必不可少的。阈值电流密度的重要性可以通过其对激光二极管效率和输出功率的直接影响来观察。当电流密度超过这一阈值时，增益介质中的激发电子被充分填充，从而允许光的放大。这一转变标志着激光过程的开始，其中产生了一束相干光。因此，较低的阈值电流密度通常是可取的，因为它表明激光可以以较少的功率输入达到激光条件，从而提高能源效率。此外，阈值电流密度受到多种因素的影响，包括温度、材料组成和器件结构。例如，随着温度的升高，激光二极管活跃区域中的载流子密度可能发生变化，从而影响阈值电流密度。此外，不同的半导体材料表现出不同的特性，这可能导致激光发射所需的阈值电流密度存在差异。理解这些关系使研究人员能够针对特定应用定制激光二极管的设计，例如电信、医疗设备和工业激光系统。另一个与阈值电流密度相关的重要方面是量子阱在现代激光二极管中的作用。量子阱是半导体材料的薄层，其中载流子在一个维度上被限制，显著增强了光学增益并降低了阈值电流密度。通过工程设计这些量子阱的宽度和组成，制造商可以创建具有改进性能特征的激光二极管，包括更低的工作电流和更高的输出功率。总之，阈值电流密度的概念在激光技术领域是基础性的。它不仅决定了激光二极管的操作效率，还影响着其在各个领域的设计和应用。对这一参数的透彻理解使工程师能够创新，开发出更有效和高效的激光系统。随着技术的不断进步，操控和降低阈值电流密度的能力将为下一代高性能光电设备铺平道路，最终使全球众多行业和应用受益。