带隙内有两个单独的超限状态模式,具有超高的Q因子,用于特拉赫兹波段的潜在传感应用
Yinbing An1,2, Tao Fu3, Chunyu Guo1
1College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
Sensors (Basel, Switzerland)
|August 12, 2023
概括
研究人员开发了一种新的腔结构,以过连续 (BIC) 传感器中受限状态的噪声. 这项创新能够实现高信号噪声比传感,并有可能用于紧的,高灵敏度的生物传感应用.
科学领域:
- 光子学和元材料研究
- 传感技术 传感技术
- 特拉赫兹 (THz) 波应用
背景情况:
- 连续性的边界状态 (BIC) 为传感器应用提供了高质量的,有价值的因素.
- 在BIC中宽带连续的作用是噪声,使控制和过复杂化.
- 现有的BIC传感器设计在管理光谱噪声和实现高信号噪声比方面面临挑战.
研究的目的:
- 设计一种新的腔结构,有效过BIC中的连续噪声.
- 为了实现基于BIC的传感器的高信号噪声比和广泛的自由光谱范围.
- 为单带或双带传感应用展示拟议结构的可行性.
主要方法:
- 构建一个顶底对称的空洞,用三个高电容性的矩形柱子.
- 使用特定的周期大小 (5 × 15) 创建一个带隙,过连续模式.
- 在带隙内对称性保护 (SP) 超束状态 (SBS) 和意外 (AC) SBS模式的分析.
- 通过参数调整,研究将SBS模式转换为准SBS模式.
主要成果:
- 设计的空腔有效过连续噪声,只允许有约束状态.
- 实现了高信号噪声比和广泛的自由光谱范围.
- 证明了空腔的功能作为单频或双频传感器的能力.
- 在太赫兹波段中报告了38μm/RIU的批量灵敏度和2.8 × 10^8 RIU^-1的功率 (FOM) 值.
- 证实了传感器应用的可行性,考虑到制造错误.
结论:
- 拟议的空腔结构成功地解决了BIC中的连续噪声问题.
- 该设计可实现紧,高灵敏度的生物传感和多波长传感.
- 实现的性能指标,包括高FOM和灵敏度,对于先进的THz传感应用是有希望的.
相关概念视频
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