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Updated: May 19, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Visual device for pressure measurement using photonic crystal slabs.

Yousef Nazirizadeh¹, Torben Karrock, Martina Gerken

¹Institute of Electrical and Information Engineering, Christian-Albrechts-Universität zu Kiel, Kiel, Germany. yn@tf.uni‑kiel.de

|August 4, 2012

Summary

This study presents a novel all-optical device for measuring pressure using a flexible membrane and photonic crystal. The device

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Area of Science:

Optics and Photonics
Biomedical Engineering
Materials Science

Background:

Intraocular pressure (IOP) is a critical factor in diagnosing and managing glaucoma.
Current IOP measurement methods have limitations, including the need for topical anesthesia and potential for corneal distortion.
A non-contact, minimally invasive IOP measurement offers significant clinical advantages.

Purpose of the Study:

To develop and validate a visual, all-optical pressure-measuring device.
To assess the feasibility of integrating this device for intraocular pressure monitoring.
To enhance the accuracy and accessibility of pressure measurements.

Main Methods:

A flexible membrane was designed to dilate against a photonic crystal slab.
Crossed polarization filters were employed for enhanced optical readout.
The device's response to varying pressures was calibrated and analyzed.

Main Results:

A visual, all-optical pressure-measuring device was successfully demonstrated.
The device showed a clear correlation between applied pressure and the size of a visible circular contact area.
Enhanced contrast for readout was achieved using crossed polarization filters.

Conclusions:

The proposed device offers a promising new method for non-contact pressure measurement.
Miniaturization and transparency make it suitable for integration into artificial lenses for intraocular pressure monitoring.
This technology has the potential to improve glaucoma diagnosis and management.