Low-noise quantum cascade lasers and optical antenna probe for near-field Raman spectroscopy

用于近场拉曼光谱的低噪声量子级联激光器和光学天线探针

• 批准号: 23560043
• 负责人: KASAHARA Kenichi
• 金额: $ 3.33万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560043/
• 关键词: 量子カスケードレーザ; 光アンテナ; 中赤外; 近接場; ラマン分光; 量子カスケード・レーザ; 強度雑音; 戻り光誘起雑音

The influence of external feedback on the relative intensity noise of a mid-infrared InGaAs/InAlAs distributed-feedback-quantum cascade lasers was quantitatively clarified for the first time. Next, towards the development of optical antenna probes, mid-infrared optical antennas were fabricated on a Si substrate. The FDTD method can calculate the electric field around an optical antenna, but it is not easy to experimentally discern its distribution normal to the antenna surface. So, a thin Al2O3 layer was deposited on a Si substrate through atomic layer deposition, and dumbbell-shaped slot antennas were made on this substrate. It was possible to grow a layer with the thickness being controlled to an accuracy of ~1 nm. By observing the change in the restrahlen reflection spectras, an understanding of the vertical field distribution could be gained. Obtained results are effective in achieving photo-detectors satisfying both high-sensitivity and high-speed in the mid-infrared range.

首次定量研究了外反馈对中红外InGaAs/InAlAs分布反馈量子级联激光器相对强度噪声的影响。接下来，针对光学天线探针的发展，在Si衬底上制造了中红外光学天线。FDTD方法可以计算光学天线周围的电场，但它是不容易实验辨别它的分布垂直于天线表面。因此，通过原子层沉积在Si衬底上沉积了一层薄的Al 2 O3层，并在此衬底上制作了哑铃形缝隙天线。可以生长厚度被控制到约1 nm的精确度的层。通过观察反射谱的变化，可以了解垂直场分布。所获得的结果是有效的，在实现满足高灵敏度和高速在中红外范围内的光电探测器。

项目成果

Self-mixing法による光結合効率の見積もりと量子カスケード・レーザの戻り光雑音評価

自混合法估计光耦合效率及量子级联激光器返回光噪声评估

• 发表时间: 2012
• 作者: T. Shima;M. Kuwahara;H. Sano;Y. Fujita;M. Uchiyama;and Y. Aono;山下良之;井上智晴,津島浩一,笠原健一
• 通讯作者: 井上智晴,津島浩一,笠原健一

Small Optical Feedback-Induced Noise of 6.1-um Quantum Cascade Lasers

6.1 微米量子级联激光器的小光学反馈感应噪声

• 发表时间: 2011
• 作者: T. Inoue;K. Tsushima;T. Kataoka;K Kasahara;N. Akikusa;K. Fujita;and T. Edamura
• 通讯作者: and T. Edamura

Observation of the enhancement of the electric field normal to the surface of mid-infrared slot antennas

中红外缝隙天线表面法向电场增强的观察

• 发表时间: 2013
• 作者: K. Tsushima;S. Mori;Y. Nishimura;K. Hishii;K. Kasahara;T. Yaji;H. Miyazaki;N. Ikeda;M. Ochiai;H. Oosato;Y. Sugimoto
• 通讯作者: Y. Sugimoto

中赤外光アンテナ反射率のピッチ幅依存性

中红外天线反射率与节距宽度的关系

• 发表时间: 2014
• 作者: 森俊;西村悠希;川野貴裕;國近裕太;笠原健一;家路豊成;池田直樹;杉本喜正
• 通讯作者: 杉本喜正

Surface-sensitive optical properties of slot antennas in the mid-infrared

中红外缝隙天线的表面敏感光学特性

• 发表时间: 2012
• 作者: K. Tsushima;S. Mori;K. Kasahara;N. Ikeda;H. Miyazaki;Y. Sugimoto
• 通讯作者: Y. Sugimoto