All dielectric ultra-thin trans-reflective color filter

Ayesha Shaukat; Khalid M. Arif

doi:10.1117/12.2577890

5 March 2021 All dielectric ultra-thin trans-reflective color filter

Ayesha Shaukat, Khalid M. Arif

Proceedings Volume 11694, Photonic and Phononic Properties of Engineered Nanostructures XI; 116940Y (2021) https://doi.org/10.1117/12.2577890
Event: SPIE OPTO, 2021, Online Only

Abstract

In this work, we demonstrate a lithography-free, polarization insensitive, angle-invariant trans-reflective color filter, which is composed of cost-effective, at and lossless dielectric ultra-thin films. The films with higher indices behave like a mirror of a Fabry Perot (FP) interferometer enclosing a layer of lower refractive index material between them. The transmission spectrum for the basic additive (red, green, blue (RGB)) and subtractive (cyan, magenta and yellow (CMY)) colors is studied first. The dimensions of the device are obtained with the help of the particle swarm optimization (PSO) algorithm for optimal results. The transmission/reflection efficiency obtained in the proposed device is above 99% with minimum full width at half maximum (FWHM) value of 74 nm at lower wavelengths. Similarly, the change in the cavity thickness sweeps the resonance wavelength across the visible regime. A minimum cross talk between blue and red colors is observed at higher wavelengths. The proposed design involves one deposition run, thus can be implemented for numerous applications.

Conference Presentation

Citation Download Citation

Ayesha Shaukat and Khalid M. Arif "All dielectric ultra-thin trans-reflective color filter", Proc. SPIE 11694, Photonic and Phononic Properties of Engineered Nanostructures XI, 116940Y (5 March 2021); https://doi.org/10.1117/12.2577890

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