Three-dimensional phononic nanocrystal composed of ordered quantum dots

NCU Institutional Repository > 資訊電機學院 > 電機工程學系 > 期刊論文 > Item 987654321/52004

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题名:	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
贡献者:	電機工程學系
关键词:	ACOUSTIC PHONONS
日期:	2010
上传时间:	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
显示于类别:	[電機工程學系] 期刊論文

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