Wide-band all-angle acoustic self-collimation by rectangular sonic crystals with elliptical bases
Küçük Resim Yok
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Iop Publishing Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Self-collimation of acoustic waves in the whole angular range of +/- 90 degrees. in the second and third bands of a two-dimensional rectangular sonic crystal with elliptical basis is demonstrated by examining the band structure and equifrequency contours. 70% and 77% of the second and third bands are available for wide-band all-angle self-collimation spanning a bandwidth of approximately 29% and 25% of the central frequencies of the all-angle self-collimation frequency ranges, respectively. Self-collimation of waves over large distances with a small divergence of beam width in the transverse direction is demonstrated through computations based on the finite element method. The second and third bands available for self-collimation are seen to vary linearly in the vast mid-range where a small group velocity dispersion prevents temporal divergence of waves with different frequencies.
Açıklama
Anahtar Kelimeler
[No Keywords]
Kaynak
Journal of Physics D-Applied Physics
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
44
Sayı
20
