在纳米光子学中的可见到中红外调节频率
Arkadev Roy1, Luis Ledezma1,2, Luis Costa1
1Department of Electrical Engineering, California Institute of Technology, Pasadena, California, 91125, USA.
Nature communications
|October 17, 2023
概括
研究人员使用尼酸纳米光子学开发了可调节的光学频率. 这一突破使可见光和中红外光在单一芯片上产生,克服了各种应用的光谱限制.
科学领域:
- 光子学 是一个光子学.
- 纳米技术纳米技术
- 量子光学是一种量子光学.
背景情况:
- 光学频率对计量,测距和通信至关重要.
- 目前的进展主要集中在近红外上,限制了需要可见光和中红外光谱的应用,特别是在纳米光子学中.
研究的目的:
- 用纳米光子设备在可见和中红外光谱区域展示广泛调节的光学频率 generation.
- 为了克服现有的纳米光子源的光谱稀疏性和局限性.
主要方法:
- 使用光学参数振荡器集成到尼酸盐纳米光子学中.
- 实现了从1.5到3.3微米的八度跨度的可调性,具有femtojoule值.
- 在同一芯片上使用红外的升级转换来产生可见到620nm.
主要成果:
- 证明了具有超宽带调整能力的小比秒光学频率.
- 在可见 (620 nm) 到中红外线 (3.3 μm) 频谱范围内实现了子生成.
- 展示了在单个纳米光子芯片上进行子生成的femtjoule级能量值.
结论:
- 提出了有效的纳米光子频率源的实用和通用方法.
- 在纳米光子子生成中克服了光谱稀疏性限制.
- 启用了多功能可见到中红外光谱覆盖,用于先进的应用.
相关概念视频
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Hydrocarbons such as alkanes, alkenes, and alkynes show characteristic C–H stretching absorption bands. These IR stretching frequencies depend on the hybridization of the involved carbon atom and can be explained in terms of the s character of each hybridized atomic orbital.
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...
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IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
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