1. Front Matter

2. Introduction

a. Conventional Colour Filters and Image Sensors

b. Conventional Multispectral Imaging (MI) sensor Systems

i. Prism/Beam Splitter

ii. Multilayer Coating based Filters

1. Fabry-Pérot (FP) Etalon

c. Applications of MI

d. Limitations of the conventional Multispectral sensor systems

e. Summary and Conclusions

3. Nanostructured Metasurface-based Optical Filters for MI applications

b. Silicon Nanowire based filters

c. Metallic Plasmonic Surface Filters

i. Nanoslit Gratings

ii. Nanohole Arrays

iii. Nanoparticle Structures

iv. Metallic Apertures

d. Other techniques

e. Summary and Conclusions

4. Simulation and Fabrication Techniques for Nanoscale Metasurfaces

a. Geometry, Structures and Materials

b. Boundary Conditions

c. Meshing

d. Materials Considerations

f. Summary and Conclusions

5. Transmission Enhancement in Coaxial Hole Array Based Plasmonic Color Filters

a. Introduction

b. Simulation Model and Optimization Method

d. Summary and Conclusions

6. Single Sensor based Multispectral Sensor Examples using Metasurfaces

a. CMY Camera using Nanorod Filter Mosaic

b. Multispectral Imaging Camera using a Narrow Spectral Band Colour Mosaic

d. Summary and Conclusions

7. Concluding Remarks