Engineering site-controlled quantum dots for optical quantum information processing

Pyramidal quantum dots have been established as a promising source of single and entangled photons for quantum information applications. However, their small brightness calls for new strategies both to boost extraction efficiency and to plan for heterogeneous integration protocols in view of demanding quantum information processing applications. In this paper we show that a simple technique based on chemo-mechanical planarization (CMP) can effectively remove several obstacles to the further processing of this kind of system, and pave the way for the use of in-situ lithographic techniques to tag individual quantum dots.

[1]  Self-limiting evolution of seeded quantum wires and dots on patterned substrates. , 2012, Physical review letters.

[2]  Emanuele Pelucchi,et al.  Towards quantum-dot arrays of entangled photon emitters , 2013, 1402.1709.

[3]  A. Shields.  Semiconductor quantum light sources , 2007, 0704.0403.

[4]  B. Gerardot,et al.  Highly directional emission from a quantum emitter embedded in a hemispherical cavity. , 2015, Optics letters.

[5]  Yoshihisa Yamamoto,et al.  Indistinguishable photons from a single-photon device , 2002, Nature.

[6]  O. Schmidt,et al.  Experimental methods of post-growth tuning of the excitonic fine structure splitting in semiconductor quantum dots , 2012, Nanoscale Research Letters.

[7]  Yoshihisa Yamamoto,et al.  Indistinguishable photons from a single-photon device , 2002, Nature.

[8]  A. Gocalinska,et al.  Selective carrier injection into patterned arrays of pyramidal quantum dots for entangled photon light-emitting diodes , 2016, 1707.06190.

[9]  Alfred Forchel,et al.  Quantum dot micropillars , 2010 .

[10]  Conditions for entangled photon emission from (111)B site-controlled Pyramidal quantum dots , 2015, 1502.05249.

[11]  A. Gocalinska,et al.  Statistical study of stacked/coupled site-controlled pyramidal quantum dots and their excitonic properties , 2017, 1708.09758.

[12]  J. Rarity,et al.  Photonic quantum technologies , 2013 .

[13]  E. Kapon,et al.  Self Limiting Growth of Quantum Dot Heterostructures on Nonplanar {111}B Substrates , 1997 .

[14]  D. Vvedensky,et al.  Self-ordered nanostructures on patterned substrates , 2018, Journal of Materials Science: Materials in Electronics.

[15]  E. Kapon,et al.  Single-Photon Emission from Site-Controlled Pyramidal Quantum Dots , 2004 .

[16]  Gunnar Björk,et al.  Improved light extraction from emitters in high refractive index materials using solid immersion lenses , 2002 .

[17]  Jake Iles-Smith,et al.  A solid-state source of strongly entangled photon pairs with high brightness and indistinguishability , 2019, Nature Nanotechnology.