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Geometry and composition comparisons between c-plane disc-like and m-plane core-shell InGaN/GaN quantum wells in a nitride nanorodChe-Hao Liao, Wen-Ming Chang, Horng-Shyang Chen, Chih-Yen Chen, Yu-Feng Yao, Hao-Tsung Chen, Chia-Ying Su, Shao-Ying Ting, Yean-Woei Kiang, and C. C. Yang »View Author Affiliations
Che-Hao Liao,
Wen-Ming Chang,
Horng-Shyang Chen,
Chih-Yen Chen,
Yu-Feng Yao,
Hao-Tsung Chen,
Chia-Ying Su,
Shao-Ying Ting,
Yean-Woei Kiang,
and C. C. Yang*
Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University, 1, Roosevelt Road, Section 4, Taipei, 10617 Taiwan *Corresponding author: ccy@cc.ee.ntu.edu.tw |
Optics Express, Vol. 20, Issue 14, pp. 15859-15871 (2012)
http://dx.doi.org/10.1364/OE.20.015859
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Abstract
With the nano-imprint lithography and the pulsed growth mode of metalorganic chemical vapor deposition, a regularly-patterned, c-axis nitride nanorod (NR) array of quite uniform geometry with simultaneous depositions of top-face, c-plane disc-like and sidewall, m-plane core-shell InGaN/GaN quantum well (QW) structures is formed. The differences of geometry and composition between these two groups of QW are studied with scanning electron microscopy, cathodoluminescence, and transmission electron microscopy (TEM). In particular, the strain state analysis results in TEM observations provide us with the information about the QW width and composition. It is found that the QW widths are narrower and the indium contents are higher in the sidewall m-plane QWs, when compared with the top-face c-plane QWs. Also, in the sidewall m-plane QWs, the QW width (indium content) decreases (increases) with the height on the sidewall. The observed results can be interpreted with the migration behaviors of the constituent atoms along the NR sidewall from the bottom.
© 2012 OSA
OCIS Codes
(300.6470) Spectroscopy : Spectroscopy, semiconductors
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices
ToC Category:
Optoelectronics
History
Original Manuscript: May 10, 2012
Manuscript Accepted: June 20, 2012
Published: June 27, 2012
Virtual Issues
Vol. 7, Iss. 9 Virtual Journal for Biomedical Optics
Citation
Che-Hao Liao, Wen-Ming Chang, Horng-Shyang Chen, Chih-Yen Chen, Yu-Feng Yao, Hao-Tsung Chen, Chia-Ying Su, Shao-Ying Ting, Yean-Woei Kiang, and C. C. Yang, "Geometry and composition comparisons between c-plane disc-like and m-plane core-shell InGaN/GaN quantum wells in a nitride nanorod," Opt. Express 20, 15859-15871 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-14-15859
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Adv. Mater. (Deerfield Beach Fla.)
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Appl. Phys. Express
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Appl. Phys. Lett.
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