Design and development of optimized scattering structures and fabrication using stereolithography apparatus
A disordered structure is the one which causes multiple scattering events to the light entering the medium and as a result of which it undergoes a random path of propagation. There has been a growing interest around random scattering structures due to their increased effectiveness in light loc...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
Nanyang Technological University
2024
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| Online Access: | https://hdl.handle.net/10356/177760 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | A disordered structure is the one which causes multiple scattering events to the
light entering the medium and as a result of which it undergoes a random path of
propagation. There has been a growing interest around random scattering structures
due to their increased effectiveness in light localisation. In this project, the design of
random scattering substrates is done using Computer Aided Design (CAD) software
and are fabricated using Stereolithography 3D printing technique. The optimisation of
random substrates is carried out by varying the dimensions, orientations and density
of the shapes with a specific grid pattern. 3D printed substrates are characterised using
confocal microscopy and the effectiveness of the light localisation is quantified using
Coherent Backscattering (CBS) measurements. The concept of using randomness for
effective light localisation can be incorporated to sensing applications including
microfluidics. Here, we use the substrates with random microfluidic channels for
photoluminescence spectroscopy based chemical sensing of Rhodamine 6G.
In short, this research is focused on investigating the fundamental performance
of light localisation in 3D printed micro-scale random scattering structures and their application in microfluidic sensing. |
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