Height stabilization of GaSb/GaAs quantum dots by Al-rich capping
Height stabilization of GaSb/GaAs quantum dots by Al-rich capping
复制标题
通过富铝封盖实现 GaSb/GaAs 量子点的高度稳定
DOI:
--
复制
发表时间:
2014
期刊:
影响因子:
--
通讯作者:
J. Millunchick
中科院分区:
文献类型:
--
作者:
Ep Erwin Smakman;M. Dejarld;M. Luengo;Andrew J. Martin;V. Sih;P. Koenraad;J. Millunchick
GaSb quantum dots (QDs) in a GaAs matrix are investigated with cross-sectional scanning tunneling microscopy (X-STM) and photoluminescence (PL). We observe that Al-rich capping materials prevent destabilization of the nanostructures during the capping stage of the molecular beam epitaxy (MBE) growth process and thus preserves the QD height. However, the strain induced by the absence of destabilization causes many structural defects to appear around the preserved QDs. These defects originate from misfit dislocations near the GaSb/GaAs interface and extend into the capping layer as stacking faults. The lack of a red shift in the QD PL suggests that the preserved dots do not contribute to the emission spectra. We suggest that a better control over the emission wavelength and an increase of the PL intensity is attainable by growing smaller QDs with an Al-rich overgrowth.
登录
查看更多内容
影响因子:
4
作者:
T. Nowozin;L. Bonato;A. Högner;A. Wiengarten;D. Bimberg;Wei-Hsun Lin;Shih-Yen Lin;C. Reyner;B. Liang;D. Huffaker
通讯作者:
T. Nowozin;L. Bonato;A. Högner;A. Wiengarten;D. Bimberg;Wei-Hsun Lin;Shih-Yen Lin;C. Reyner;B. Liang;D. Huffaker
影响因子:
4
作者:
Ep Erwin Smakman;J. Garleff;R. Young;M. Hayne;P. Rambabu;P. Koenraad
通讯作者:
Ep Erwin Smakman;J. Garleff;R. Young;M. Hayne;P. Rambabu;P. Koenraad
影响因子:
3.7
作者:
T. Nowozin;A Marent;G. Hönig;A. Schliwa;D. Bimberg;A. Beckel;B. Marquardt;A. Lorke;M. Geller
通讯作者:
M. Geller
DOI:
10.1088/0022-3727/43/6/065402
发表时间:
2010-01
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
作者:
M. A. Kamarudin;M. Hayne;Q. Zhuang;O. Kolosov;T. Nuytten;V. Moshchalkov;F. Dinelli
通讯作者:
M. A. Kamarudin;M. Hayne;Q. Zhuang;O. Kolosov;T. Nuytten;V. Moshchalkov;F. Dinelli
影响因子:
4
作者:
A. Marent;T. Nowozin;J. Gelze;F. Luckert;D. Bimberg
通讯作者:
D. Bimberg