Dönen Kare Çubuklu İki Boyutlu Fononik Kristalin Dispersiyon Özellikleri

Year 2019, Volume: 19 Issue: 3, 536 - 543, 31.12.2019

Selami Palaz , Oral Oltulu , Amirullah M. Mamedov

https://doi.org/10.35414/akufemubid.577855

Abstract

Bu çalışmada, bir kare
örgülü hava matrisinde yer alan kare şekilli saçılardan oluşan iki boyutlu
fononik kristallerin bant yapısı çalışıldı. Bant yapısı hesaplamaları için, bir
hava matrisindeki kare LiNbO₃ çubuklarından oluşan iki boyutlu bir
fononik kristal dikkate alındı. Kare çubukların yönelimlerinin akustik bant
aralıkları üzerindeki etkisi, iletim kaybı spektrumları, basınç alanı haritası
ve dağılım ilişkileri sonlu elemanlar yöntemi ve Bloch teoremi kullanılarak
hesaplandı. Bu yapı için maksimum bant aralığı 45° dönme açısında bulundu.
Sayısal sonuçlar, bant aralıklarının kare çubukların dönüş açısını değiştirerek
ayarlanabileceğini göstermektedir.

Keywords

Akustik Dalgalar, Fononik Kristaller, Metamateryaller, Bant Aralıkları

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