Characterizing the nanoacoustic superlattice in a phonon cavity using a piezoelectric single quantum well

Kung Hsuan Lin, Chieh Feng Chang, Chang Chi Pan, Jen Inn Chyi, Stacia Keller, Umesh Mishra, Steven P. Denbaars, Chi Kuang Sun

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We have experimentally and theoretically investigated, both in the time domain and in the frequency domain, the characteristics of a nanoacoustic mirror, which is a 17-period 8 nm8 nm Al0.7 Ga0.3 N Al0.2 Ga0.8 N superlattice and its first phononic band gap frequency is centered at ∼280 GHz. By using a femtosecond optical pulse to excite and detect the nanoacoustic strain pulses with an In0.2 Ga0.8 N single quantum well, we directly measured the transient dynamics of the acoustic nanowaves inside a phonon cavity composed of the studied nanoacoustic mirror. The phase-resolved reflection transfer function of the phononic band gap superlattice and the properties of the nanophononic cavity have been experimentally obtained and investigated.

Original languageEnglish
Article number143103
JournalApplied Physics Letters
Volume89
Issue number14
DOIs
StatePublished - 2006

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