000225127 001__ 225127
000225127 005__ 20181203024535.0
000225127 0247_ $$2doi$$a10.1007/s12274-016-1206-7
000225127 022__ $$a1998-0124
000225127 02470 $$2ISI$$a000386770300008
000225127 037__ $$aARTICLE
000225127 245__ $$aSelf-formation of hexagonal nanotemplates for growth of pyramidal quantum dots by metalorganic vapor phase epitaxy on patterned substrates
000225127 260__ $$bTsinghua Univ Press$$c2016$$aBeijing
000225127 269__ $$a2016
000225127 300__ $$a12
000225127 336__ $$aJournal Articles
000225127 520__ $$aWe demonstrate the self-formation of hexagonal nanotemplates on GaAs (111)B substrates patterned with arrays of inverted tetrahedral pyramids during metal-organic vapor phase epitaxy and its role in producing high-symmetry, site-controlled quantum dots (QDs). By combining atomic force microscopy measurements on progressively thicker GaAs epitaxial layers with kinetic Monte Carlo growth simulations, we demonstrate self-maintained symmetry elevation of the QD formation sites from three-fold to six-fold symmetry. This symmetry elevation stems from adatom fluxes directed towards the high-curvature sites of the template, resulting in the formation of a fully three-dimensional hexagonal template after the deposition of relatively thin GaAs layers. We identified the growth conditions for consistently achieving a hexagonal pyramid bottom, which are useful for producing high-symmetry QDs for efficient generation of entangled photons.
000225127 6531_ $$ametalorganic vapor phase epitaxy
000225127 6531_ $$akinetic Monte Carlo simulations
000225127 6531_ $$aepitaxial growth on patterned substrates
000225127 6531_ $$asymmetry elevation
000225127 6531_ $$aadatom diffusion
000225127 700__ $$0242321$$g173892$$aSurrente, Alessandro
000225127 700__ $$0242325$$g160450$$aCarron, Romain
000225127 700__ $$0242318$$g175930$$aGallo, Pascal
000225127 700__ $$0240082$$g106305$$aRudra, Alok
000225127 700__ $$aDwir, Benjamin$$g105040$$0240081
000225127 700__ $$aKapon, Eli$$g105530$$0240239
000225127 773__ $$j9$$tNano Research$$k11$$q3279-3290
000225127 909C0 $$xU10158$$0252035$$pLPN
000225127 909CO $$pSB$$particle$$ooai:infoscience.tind.io:225127
000225127 937__ $$aEPFL-ARTICLE-225127
000225127 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000225127 980__ $$aARTICLE