نوع مقاله : پژوهشی

نویسنده

• ربابه طالب زاده

گروه فیزیک، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران

چکیده

A one-dimensional doped semiconductor photonic crystal under an external static magnetic field is investigated. The considered photonic crystal has a structure of air/(AB)N/air, where A is a dielectric layer (quartz glass), B is a doped semiconductor (nGaAs), and N is the stack number. We show that the doped semiconductor behaves like single negative layer and the structure behaves as a multichannel filter under the external static magnetic field. So that, the transmission spectra of this filter appear as N-1 comb-like sharp resonance peaks for N>1. Also, numerical results show that the resonance frequencies can be tuned by varying the external magnetic field and the electron density of semiconductor in such a way that the increase of the magnetic field and the electron density will cause the resonance frequencies to be red-shifted and blue-shifted, respectively. The proposed Fabry-Perot filter in compare to the usual multichannel filters based on the photonic crystal is a defect-free multilayer structure.

کلیدواژه‌ها

• بلور فوتونی
• فابری پرو
• فیلتر
• نیمه هادی