Three-dimensional phononic nanocrystal composed of ordered quantum dots

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題名:	Three-dimensional phononic nanocrystal composed of ordered quantum dots
作者:	Wen,YC;Sun,JH;Dais,C;Grutzmacher,D;Wu,TT;Shi,JW;Sun,CK
貢獻者:	電機工程學系
關鍵詞:	ACOUSTIC PHONONS
日期:	2010
上傳時間:	2012-03-28 10:13:04 (UTC+8)
出版者:	國立中央大學
摘要:	We demonstrated a nanoscaled artificial phononic crystal composed of three-dimensionally ordered quantum dots (QDs) with functional acoustic properties. Femtosecond ultrasonic technique is used to investigate the lattice dynamics of this phononic nanocrystal. The measurement results indicate that three-dimensional ordering and uniformity of the QDs are important factors influencing the observed acoustic resonance at the forbidden bands. For well-arranged QDs, noticeable features of the phononic band gap and the associated phonon cavity mode can be found, while this nanocrystal also serves as an effective acoustic medium, or acoustic meta material, for low-frequency acoustic phonons.
關聯:	APPLIED PHYSICS LETTERS
顯示於類別:	[電機工程學系] 期刊論文

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