材料科学
光纤布拉格光栅
等离子体子
窄带
光学
光电子学
极化(电化学)
制作
带宽(计算)
光纤
折射率
表面等离子体子
光功率
波长
物理
电信
激光器
计算机科学
化学
医学
替代医学
物理化学
病理
作者
Efraín Villatoro,Médéric Loyez,Joel Villatoro,Christophe Caucheteur,Jacques Albert
出处
期刊:ACS Sensors
[American Chemical Society]
日期:2024-06-12
卷期号:9 (6): 3027-3036
标识
DOI:10.1021/acssensors.4c00229
摘要
Surface plasmon (SP) excitation in metal-coated tilted fiber Bragg gratings (TFBGs) has been a focal point for highly sensitive surface biosensing. Previous efforts focused on uniform metal layer deposition around the TFBG cross section and temperature self-compensation with the Bragg mode, requiring both careful control of the core-guided light polarization and interrogation over most of the C + L bands. To circumvent these two important practical limitations, we studied and developed an original platform based on partially coated TFBGs. The partial metal layer enables the generation of dual-comb resonances, encompassing highly sensitive (TM/EH mode families) and highly insensitive (TE/HE mode families) components in unpolarized transmission spectra. The interleaved comb of insensitive modes acts as wavelength and power references within the same spectral region as the SP-active modes. Despite reduced fabrication and measurement complexity, refractometric accuracy is not compromised through statistical averaging over seven individual resonances within a narrowband window of 10 nm. Consequently, measuring spectra over 60 nm is no longer needed to compensate for small temperature or power fluctuations. This sensing platform brings the following important practical assets: (1) a simpler fabrication process, (2) no need for polarization control, (3) limited bandwidth interrogation, and (4) maintained refractometric accuracy, which makes it a true game changer in the ever-growing plasmonic sensing domain.
科研通智能强力驱动
Strongly Powered by AbleSci AI