Photoluminescence of InGaAs/GaAs Quantum Nanodisk in Pillar Fabricated by Biotemplate, Dry Etching, and MOVPE Regrowth

Akio Higo*, Takayuki Kiba, Junichi Takayama, Chang Yong Lee, Cedric Thomas, Takuya Ozaki, Hassanet Sodabanlu, Masakazu Sugiyama, Yoshiaki Nakano, Ichiro Yamashita, Akihiro Murayama, Seiji Samukawa


研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)


The III-V compound semiconductor quantum dot (QD) photonic devices have attracted considerable attention due to their stable operation at high temperature, low threshold current, and high-speed modulation. The photoluminescence (PL) energy of QDs depends on the dot sizes and the energy height of barriers. It is difficult to encourage the growth of low indium content QDs because of small lattice distortions between the InGaAs well regions and GaAs barrier regions. In conventional self-organized QD devices produced by Stranski-Krastanow growth methods, the injected carriers are first captured by the wetting layers and then dropped to the QDs with relaxation to the ground state for QD devices. Our proposed unique quantum disk structures have no wetting layers because the quantum well (QW) region is fully etched by using a low-damage dry etching process. We produced 30 nm diameter and 9 nm thick InGaAs nanodisks using a biotemplate via neutral beam etching and metal-organic vapor phase epitaxy (MOVPE). We observed the InGaAs nanodisks via scanning electron microscopy and measured their photoluminescence (PL). To confirm the quantum confinement effects of InGaAs nanodisks, their energies and transient PL behaviors were measured as a function of temperature. The combined low-damage dry etching and MOVPE regrowth processes form an important technique, as they promise a low-damage interface and regrowth ability. This unique technology is attractive for carrier transportation dynamics and spintronics of hybrid QDs and QW nanostructures, and it is easy to adapt for industrial production systems.

頁(從 - 到)1945-1951
期刊ACS Applied Electronic Materials
出版狀態Published - 24 9月 2019


深入研究「Photoluminescence of InGaAs/GaAs Quantum Nanodisk in Pillar Fabricated by Biotemplate, Dry Etching, and MOVPE Regrowth」主題。共同形成了獨特的指紋。