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A photonic crystal fiber sensor

A photonic crystal fiber, optical fiber technology, applied in cladding fiber, optical waveguide light guide, nanotechnology for sensing, etc., can solve the problems of unreliable liquid detection SERS platform, hollow core damage, etc.

Active Publication Date: 2015-07-15
AGENCY FOR SCI TECH & RES
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  • Abstract
  • Description
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Problems solved by technology

[0010] However the main challenge of the above approach is to ensure that only the cladding holes are selectively sealed while leaving the hollow core undisturbed
High temperature treatment / slicer approach to selectively close cladding pores may also result in damage to hollow cores
Once the core hole is destroyed, the light transmission is uncontrolled, thus making the above technique a less reliable SERS platform for liquid detection

Method used

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  • A photonic crystal fiber sensor
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Embodiment Construction

[0060] Embodiments of the present invention provide a photonic crystal fiber (PCF) and a PCF-based SERS detection platform for detecting protein concentrations on the order of picogram levels in nanoliter level sample volumes. Embodiments of the present invention further provide an in vivo tunable SERS detection platform within HCPCF using metallic nanoshells / nanorods.

[0061] The inventors have performed comparative SERS studies on a normal optical fiber (NF) with a core diameter of about 1 millimeter (mm) and a hollow core PCF (HCPCF) with a core diameter of about 6 microns (μm). The SERS active substrate is fabricated within the NF by metal film-on-nanosphere (MFON) technology, in which polystyrene beads with a diameter of about 400 nanometers (nm) are densely packed at the core at the detection end, followed by 20 nm silver (Ag) coating. The SERS active region was fabricated in HCPCF by dipping the probe end of the fiber into a 40 nm citrate-stabilized gold (Au) colloida...

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Abstract

A method for sensing, a photonic crystal fiber, a method for fabricating a photonic crystal fiber sensor, and a Surface Enhanced Raman Scattering (SERS) sensing apparatus. The method for sensing comprises the steps of providing a photonic crystal fiber comprising a hollow core and a plurality of cladding holes around the hollow core; providing Surface Enhanced Raman Scattering (SERS) active nanoparticles; and adapting the SERS active nanoparticles and / or the fiber for SERS sensing.

Description

field of invention [0001] The present invention broadly relates to detection methods, photonic crystal fibers, methods of manufacturing photonic crystal fiber sensors, and surface-enhanced Raman scattering (SERS) detection devices. technical background [0002] Surface-enhanced Raman scattering (SERS) is a versatile detection and analysis technique in which analytes are adsorbed on nanoroughened noble metal surfaces or their colloidal particles, mainly gold (Au) or silver (Ag). Due to the surface plasmon effect, the field strength of the analyte molecules is significantly increased; therefore, the detectable scattered signal is also several times larger. The SERS spectrum of a molecule typically contains peaks or bands that uniquely represent a specific set of atomic groups / atom species present in each analyte. This distinctive feature allows the creation of molecular Raman spectra that represent the vibrational frequencies of the analyte and provides a platform for "finger...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02G01N21/65B82B1/00G02B6/036
CPCG02B6/02328B82Y15/00B82Y5/00G01N21/658G01N21/7703
Inventor 戴尼斯·尤尼迈德哈瓦-库拉普-苏达米尼-阿玛符致耀马里尼·奥利沃苏杰胜
Owner AGENCY FOR SCI TECH & RES
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