Unidirectional Emission of a Site-Controlled Single Quantum Dot from a Pyramidal Structure
Sejeong Kim, Su-Hyun Gong, Jong-Hoi Cho, Yong-Hoon Cho
Nano Letters | AMER CHEMICAL SOC | Published : 2016
Emission control of a quantum emitter made of semiconductor materials is of significance in various optical applications. Specifically, the realization of efficient quantum emitters is important because typical semiconductor quantum dots are associated with low extraction efficiency levels due to their high refractive index contrast. Here, we report bright and unidirectional emission from a site-controlled InGaN quantum dot formed on the apex of a silver-coated GaN nanopyramidal structure. We show that the majority of the extracted light from the quantum dot is guided toward the bottom of the pyramid with high directionality. We also demonstrate that nanopyramid structures can be detached fr..View full abstract
Awarded by National Research Foundation of the Korean government (MSIP)
Awarded by Future Semiconductor Device Technology Development Program - MOTIE (Ministry of Trade, Industry and Energy)
Awarded by Climate Change Research Hub of KAIST
The authors thank Prof. Jong-Hwa Shin (KAIST) for the discussion about the simulation results. This work was supported by the National Research Foundation (NRF-2016R1A2A1A05005320) of the Korean government (MSIP), the Future Semiconductor Device Technology Development Program (10044735) funded by MOTIE (Ministry of Trade, Industry and Energy) and the KSRC (Korea Semiconductor Research Consortium), and the Climate Change Research Hub of KAIST (grant no. N11160013).