Multiwavelength optical sensor based on a gradient photonic crystal with a hexagonal plasmonic array
| Parent link: | Sensors and Actuators B: Chemical Vol. 311.— 2020.— [127837, 9 p.] |
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| Autor corporatiu: | , |
| Altres autors: | , , , , , |
| Sumari: | Title screen Sensitivity and versatility are characteristics that make a sensor device attractive for wide-spread applications in everyday life. Surface-enhanced Raman spectroscopy (SERS) is capable of providing the highest sensitivity, that of single-molecule detection, and excellent specificity due to its fingerprinting capability. However, conventional SERS substrates must be optimized to operate for a particular excitation wavelength. Here in this work, we achieve for the first time multiwavelength amplification with a hybrid plasmonic/photonic heterostructure integrating a gradient photonic crystal and an Ag nanotriangle array. We demonstrate the detection of ultrathin molecular layers showing a signal amplification for the typical laser wavelengths used in Raman spectroscopy detection. By combining photonics and plasmonics in a single silicon chip, we expand multiwavelength- and spatially-selective ultra-sensitive detection to a wide range of applications from biomedicine to safety. Режим доступа: по договору с организацией-держателем ресурса |
| Publicat: |
2020
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| Matèries: | |
| Accés en línia: | https://doi.org/10.1016/j.snb.2020.127837 |
| Format: | Electrònic Capítol de llibre |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662455 |