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Theory of SNAP devices: basic equations and comparison with the experiment.

¹OFS Laboratories, 19 Schoolhouse Road, Somerset, NJ 08873, USA. sumetski@ofsoptics.com

|October 6, 2012

Summary

Surface Nanoscale Axial Photonics (SNAP) devices utilize optical fibers with nanoscale variations to create Fano resonances. This study develops the theory and experimentally validates SNAP devices, showing excellent agreement between predictions and results.

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Area of Science:

Photonics
Nanotechnology
Optical physics

Background:

Surface Nanoscale Axial Photonics (SNAP) devices leverage optical fibers with nanoscale effective radius variations.
These devices couple input/output waveguides to excite whispering gallery modes that propagate along the fiber axis.

Purpose of the Study:

To develop the theoretical framework for SNAP devices.
To analyze the transmission amplitudes of SNAP models exhibiting Fano resonances.
To experimentally characterize SNAP bottle microresonators and coupled microresonator chains.

Main Methods:

Theoretical modeling of SNAP devices.
Analysis of transmission amplitudes in simplified SNAP models.
Experimental characterization of single and coupled SNAP microresonators.

Main Results:

Demonstration of asymmetric Fano resonances in SNAP devices.
Experimental validation of the theoretical model for SNAP devices.
Excellent agreement between theoretical predictions and experimental data for microresonators and coupled systems.

Conclusions:

The developed theory accurately describes the behavior of SNAP devices.
SNAP devices exhibit tunable Fano resonances with potential applications in optical sensing and signal processing.
Experimental results confirm the efficacy of the theoretical approach for SNAP device analysis.