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Self-referenced sensor utilizing extra-ordinary optical transmission from metal nanoslits array.

Sachin Kumar Srivastava, Ibrahim Abdulhalim

|September 23, 2015

Summary

We developed a novel self-referenced sensor using extraordinary optical transmission (EOT) in metal-nanoslits. This sensor detects water in ethanol, paving the way for advanced biosensing applications.

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Area of Science:

Photonics and Nanotechnology
Optical Sensing
Biomedical Engineering

Background:

Extraordinary optical transmission (EOT) through metal-nanostructures offers unique optical properties.
Near-infrared (NIR) telecommunication window is crucial for optical sensing applications.
Developing self-referenced sensors is key for accurate real-time measurements.

Purpose of the Study:

To report the first self-referenced sensor utilizing EOT in a metal-nanoslits array.
To demonstrate the sensor's capability in detecting analytes within the NIR telecommunication window.
To explore potential applications in biosensing and remote monitoring.

Main Methods:

Fabrication of a metal-nanoslits array chip.
Characterization of EOT through the nanoslits.
Monitoring transmission peak shifts in response to changes in analyte refractive index.
Detection of water in ethanol using the developed sensor.

Main Results:

The nanoslits array exhibited two enhanced transmission peaks in the NIR spectrum.
One transmission peak showed a red shift correlating with increased analyte refractive index.
Successful detection of small quantities of water in ethanol was achieved.
The sensor demonstrated self-referenced capabilities.

Conclusions:

The developed EOT-based nanoslits array serves as a novel self-referenced sensor.
The sensor shows promise for sensitive and selective analyte detection.
This technology could lead to ultra-small biosensor chips for optical fiber integration and remote sensing.