Single-Mode Lasing in Plasmonic-Enhanced Woven Microfibers for Multifunctional Sensing,ACS Sensors

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Single-Mode Lasing in Plasmonic-Enhanced Woven Microfibers for Multifunctional Sensing
ACS Sensors ( IF 8.2 ) Pub Date : 2021-08-25 , DOI: 10.1021/acssensors.1c01278
Shuai Zhang ₁ , Xiaoyu Shi ₁ , Shaoxin Yan ₂ , Xiao Zhang ₁ , Kun Ge ₁ , Chang Bao Han ₂ , Tianrui Zhai ₁

Affiliation

Single-mode plasmonic lasing has great potential for use in photonic and sensing applications. In this work, single-mode lasing is realized using a plasmonic-enhanced woven microfiber that shows ultrahigh sensitivity to the ambient environment. This plasmonic-enhanced microfiber is fabricated by spraying Ag nanospheres onto rhodamine 6G-doped polymer microfibers. Single-mode laser emission with an ultranarrow linewidth (0.1 nm) and a low threshold (18.8 kW/mm²) is achieved in the microfiber using the effects of mode selection and plasmonic enhancement provided by the Ag nanospheres. A large wavelength shift in the single-mode lasing is observed when the proposed laser is used as a sensor and exposed to a humid or acidic environment. The wavelength shift is attributed to refractive index variations in the microfiber caused by either moisture absorption or chemical reactions. In humidity sensing, the laser’s sensitivity is as high as 826.6 pm/% relative humidity (RH) and the detection limit is 0.051% RH. An innovative strategy for acetic acid gas sensing is proposed that uses the chemical reaction with rhodamine 6G, and its minimum response time is 5 min. Because of the microfiber’s excellent fabric compatibility, a wearable sensor is fabricated by weaving the plasmonic-enhanced microfiber into clothes, and this sensor demonstrates extreme bending stability. The results reported here provide a novel approach to the design and fabrication of ultrasensitive wearable sensors for multifunctional sensing applications.

中文翻译：

用于多功能传感的等离子体增强编织微纤维中的单模激光

单模等离子体激光在光子和传感应用中具有巨大的潜力。在这项工作中，单模激光是使用等离子体增强的编织超细纤维实现的，该纤维对周围环境具有超高灵敏度。这种等离子体增强微纤维是通过将银纳米球喷涂到罗丹明 6G 掺杂的聚合物微纤维上来制造的。具有超窄线宽 (0.1 nm) 和低阈值 (18.8 kW/mm ²) 是利用 Ag 纳米球提供的模式选择和等离子体增强效应在微纤维中实现的。当所提出的激光器用作传感器并暴露于潮湿或酸性环境时，在单模激光中观察到大的波长偏移。波长偏移归因于微纤维中由吸湿或化学反应引起的折射率变化。在湿度传感方面，激光的灵敏度高达 826.6 pm/% 相对湿度 (RH)，检测限为 0.051% RH。提出了一种醋酸气体传感的创新策略，该策略利用与罗丹明 6G 的化学反应，其最小响应时间为 5 分钟。由于超细纤维具有出色的织物兼容性，因此通过将等离子体增强超细纤维编织到衣服中来制造可穿戴传感器，该传感器具有极高的弯曲稳定性。这里报告的结果为多功能传感应用的超灵敏可穿戴传感器的设计和制造提供了一种新方法。

更新日期：2021-09-24

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