volume | PIER Journals

Abstract

The Alfven-spin and helicon-spin waves are analyzed in both sinusoidal periodic and layered periodic structures. These periodic structures are composed of a single composite medium having the properties of both magnetic and semiconducting materials. Numerical analysis of the dispersion relations presented for these periodic structures shows band-gap effects. The idea of these band-gap effects could be utilized in the design of periodic structures operating at microwave frequencies. Extreme cases for the decoupled independent modes in the absence of magnetization or carriers are also discussed.

1. Narahari Achar, B. N., "Helicon waves in a sinusoidal periodic structure," Phys. Stat. Sol. (B), Vol. 143, 235-242, 1987.
doi:10.1002/pssb.2221430125 Google Scholar

2. Matekovits, L., G. C. V. Colome, and M. Orefice, "Propagation of electromagnetic waves in a sinusoidally modulated dielectric substrate," IEEE Antennas and Wireless Propagation Letters, Vol. 6, 207-210, 2007.
doi:10.1109/LAWP.2007.893098 Google Scholar

3. Choubani, M., F. Choubani, A. Gharsallah, J. David, and N. E. Mastorakis, "Analysis and design of electromagnetic band gap structures with stratified and inhomogeneous media," Optics Communications, Vol. 283, 4499-4504, 2010.
doi:10.1016/j.optcom.2010.04.078 Google Scholar

4. Gurel, C. S. and E. Oncu, "Characteristics of electromagnetic wave propagation through a magnetised plasma slab with linearly varying electron density," Progress In Electromagnetics Research B, Vol. 21, 385-398, 2010. Google Scholar

5. Shah, H. A., I. U. R. Durrani, T. Abdullah, and helicon-wave propagation in a layered medium, "Nonlinear," Phys. Rev. B, Vol. 47, No. 4, 1980-1984, 1993.
doi:10.1103/PhysRevB.47.1980 Google Scholar

6. Ali, R. and H. A. Shah, "Helicon solitons in a layered semiconductor plasma via Zakharov equations," J. Phys. Condens. Matter, Vol. 9, 7583-7591, 1997.
doi:10.1088/0953-8984/9/36/006 Google Scholar

7. Shramkova, O. V., "Transmission spectra in ferrite-semiconductor periodic structure," Progress In Electromagnetics Research M , Vol. 7, 71-85, 2009.
doi:10.2528/PIERM09041305 Google Scholar

8. Fal'ko, V. L., S. I. Khankina, and V. M. Yakovenko, "Propagation of electromagnetic waves in a conducting magnetic medium," Radiophysics and Quantum Electronics, Vol. 43, No. 1, 34-40, 2000.
doi:10.1007/BF02677135 Google Scholar

9. Eliseeva, S. V., D. I. Sementsov, and M. M. Stepanov, "Dispersion of bulk and surface electromagnetic waves in bigyrotropic finely strati¯ed ferrite-semiconductor medium," Technical Phys., Vol. 53, No. 10, 1319-1326, 2008.
doi:10.1134/S1063784208100101 Google Scholar

10. Shaikh, M. N. and R. Ali, "Coupled Alfven-spin waves in a composite magnetic-semiconducting medium," Chinese Journal of Phys., Vol. 47, No. 3, 336-343, 2009. Google Scholar

11. Shaikh, M. N., R. Ali, H. A. Shah, and U. N. Chaudhary, "Coupled nonlinear waves in a composite magnetic-semiconducting medium," Phys. Lett. A, Vol. 374, 2942-2948, 2010.
doi:10.1016/j.physleta.2010.05.022 Google Scholar

Dr. Muhammad Najam Shaikh

Dr. Rashid Ali