Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free, no registration required.

I am doing some self-study on photonics and have encountered the following question:

We know that amorphous electronic crystals such as amorphous silicon have a bandgap. Can amorphous photonic crystals also have a bandgap? Roughly how large would the spacing, d, have to be for a bandgap centered around ~ 600 nm?

Here is my solution: Since $n\lambda=2dsin(\theta)$, if $\lambda=600 nm, \theta=\pi/4, n=1,$ then $d=4.24 \times 10^{-7}$.

Could somebody check over my work?

share|improve this question
    
What exactly is an amorphous photonic crystal? One which has no long-range order? –  BandGap Nov 13 '12 at 13:52
    
Also, isn't the Bragg formula used for constructive interference? If so you'd have to take d*0.5 –  BandGap Nov 13 '12 at 14:00
add comment

Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Facebook.

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.