About photonic crystal, Is there any conditions that minimum number of polymer layers of particle which can color?

09 August 2019 1 2K Report

I understand that incresing number of layers causes high reflectance..but I don't know the minimum condition that particle can be used as photonic crystal..

Seyed Hadi Badri

Hi.

As the number of layers increase, narrower FWHM could be achieved. However there is a trade-off between the device's reflection peak and FWHM, so number of layers can’t be increased indefinitely. You may start from say 5 layers and gradually increase the number of layers until you get the desired response.

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