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首页> 外文期刊>Optical engineering >Terahertz attenuators based on dielectric stacks with alternating refractive indices
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Terahertz attenuators based on dielectric stacks with alternating refractive indices

机译：基于具有交替折射率的介电叠层的太赫兹衰减器

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摘要

This article demonstrates the design of dielectric terahertz (THz) attenuators comprising of periodically placed x-cut and z-cut ion-sliced lithium niobate dielectric layers. Changes introduced in the propagating wave due to alternating refractive indices of a ferroelectric material have been exploited for the design of an effective attenuator. The electrical and optical properties gathered from experimental investigations have been used to study the influence of different crystalline orientations on the design. The conduit comprising the periodically placed dielectric slabs has been configured as a tristate switch by modulating the amplitude of the traversing THz wave by altering its angle of incidence. Full-wave finite-element simulations have been conducted over a series of parametric configurations to come up with the optimized design. A modulation depth as high as 94.76% is achieved. The proposed low-cost, easily configurable THz dielectric attenuators operating around 0.625 THz can be potentially used as an external modulator for THz quantum cascade lasers.
机译：本文演示了介电太赫兹（THz）衰减器的设计，该衰减器包括周期性放置的x切割和z切割离子切片铌酸锂电介质层。由于铁电材料的折射率交替而在传播波中引入的变化已被用于有效衰减器的设计。从实验研究中收集到的电学和光学特性已用于研究不同晶体取向对设计的影响。包含周期性放置的电介质板的导管已通过更改横过太赫兹波的入射角来调制其幅度，从而配置为三态开关。已经对一系列参数配置进行了全波有限元仿真，以提供优化的设计。调制深度高达94.76％。提议的低成本，易于配置的THz介电衰减器的工作频率约为0.625 THz，可以潜在地用作THz量子级联激光器的外部调制器。

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  • 来源
    《Optical engineering》 |2017年第10期|105104.1-105104.5|共5页
  • 作者

    Dutta Moumita; Peralta Xomalin G.; Bhalla Amar S.; Guo Ruyan;

  • 作者单位

    University of Texas at San Antonio, Department of Electrical and Computer Engineering, San Antonio, TX, United States;

    University of Texas at San Antonio, Department of Physics and Astronomy, San Antonio, TX, United States;

    University of Texas at San Antonio, Department of Electrical and Computer Engineering, San Antonio, TX, United States;

    University of Texas at San Antonio, Department of Electrical and Computer Engineering, San Antonio, TX, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    alternating high and low refractive index; amplitude modulation; dielectric switch; terahertz;

    机译：高低折射率交替出现;调幅;介质开关;太赫兹;

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