Multiwavelength optical sensor based on a gradient photonic crystal with a hexagonal plasmonic array

Lina Dedelaite, Raul D. Rodriguez, Benjamin Schreiber, Arunas Ramanavicius, Dietrich R.T. Zahn, Evgeniya Sheremet

Результат исследований: Материалы для журналаСтатьярецензирование


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.

Язык оригиналаАнглийский
Номер статьи127837
ЖурналSensors and Actuators, B: Chemical
СостояниеОпубликовано - 15 мая 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Fingerprint Подробные сведения о темах исследования «Multiwavelength optical sensor based on a gradient photonic crystal with a hexagonal plasmonic array». Вместе они формируют уникальный семантический отпечаток (fingerprint).