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I research on photonic crystals.I want to compute resonance frequency for single cylinder scattering.

I use the below expression :

J'(nkr)H(kr)-J(nkr)H'(kr)=0

J:bessel and H:hankel function.

but I can't achieve correct result by write program in Matlab for computing that.

Can you help me ?

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# Photonic crystals

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