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Biasing of Metal-Semiconductor Junctions

Biasing of Metal-Semiconductor Junctions

Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...

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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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基于铁离子二维材料的复合光子学中的电光学调.

Ghada Dushaq¹, Solomon Serunjogi², Srinivasa R Tamalampudi²

¹Department of Electrical and Computer Engineering, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates. ghd1@nyu.edu.

Light, science & applications

|April 19, 2024

概括

我们展示了一个新的2D材料,CuCrP2S6 (CCPS),用于可调整的集成光子学. 在近红外中,CCPS显示出强大的电折反应,为先进的光学设备提供精确的相位控制和低损耗.

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科学领域:

光电学和光子学的光学电子和光子学.
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

可调光学材料对于集成光子学至关重要,需要精确控制有效折射率.
现有的2D材料,如TMD和石墨烯显示出希望,但在SWIR调制,相控和低信号损失方面面临挑战.
实现紧,高效和低损耗的可调光学元件,特别是SWIR区域,仍然是光电子领域的一个重大障碍.

研究的目的:

为了研究近红外 (NIR) 波长范围内多层铁离子2D CuCrP2S6 (CCPS) 的电折反应.
将CCPS集成到光子 (SiPh) 微环共振器 (MRR) 中,以增强光物相互作用和敏感的相位/吸收测量.
为了评估基于CCPS的设备的调制效率,光学损失和偏振依赖的行为.

主要方法:

制造具有多层2D CCPS的光子微波振器.
通过离子运动对CCPS进行电调制,以诱导有效折射率的变化.
光学传输光谱的表征,以测量共振转移,灭绝比率和线宽.
对横向电 (TE) 和横向磁 (TM) 模式的偏振依赖电光调灵敏度的分析.

主要成果:

在CCPS中表现出强大的电折反应,有效折射率调整为2.8 × 10^-3 RIU.
实现了低光学损失和0.25V·cm的优异调制效率,优于基于TMD的相变器.
观察到对应电压的两极性和明显的偏振依赖调灵敏度的共振波长的一致蓝色转移.

结论:

多层2DCCPS作为集成光子应用的可调光学材料具有显著的潜力.
已经证明的CCPS的电光和离子电流能力为先进的光学切换,传感和神经形态计算提供了一条途径.
基于CCPS的设备为未来的光电子系统提供了一个有前途的平台,需要精确的光操纵和低损耗相位控制.