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• W4387343313 abstract "Tuning $mathrm{Ga}mathrm{As}$-based quantum emitters to telecom wavelengths makes it possible to use existing mature technology for applications in, e.g., long-haul ultrasecure communication in fiber networks. A promising method redeveloped recently is to use a metamorphic $(mathrm{In},mathrm{Ga})mathrm{As}$ buffer that redshifts the emission by reducing strain. However, the impact of such a buffer also causes the simultaneous modification of other quantum dot (QD) properties. Knowledge of these effects is crucial for actual implementations of QD-based nonclassical light sources for quantum communication schemes. Here, we thoroughly study single $mathrm{Ga}mathrm{As}$-based quantum dots grown by molecular-beam epitaxy on specially designed, digital-alloy $(mathrm{In},mathrm{Ga})mathrm{As}$ metamorphic buffers. With a set of structures varying in the buffer indium content and providing quantum dot emission through the telecom spectral range up to 1.6 textmu{}m, we analyze the impact of the buffer and its composition on QD structural and optical properties. We identify the mechanisms of quantum dot emission shifts with varying buffer compositions. We also look at charge-trapping processes and compare excitonic properties for different growth conditions with single-dot emission successfully shifted to both the second and third telecom windows." @default.
• W4387343313 created "2023-10-05" @default.
• W4387343313 creator A5006034270 @default.
• W4387343313 creator A5008089508 @default.
• W4387343313 creator A5008942546 @default.
• W4387343313 creator A5016460301 @default.
• W4387343313 creator A5029920200 @default.
• W4387343313 creator A5042715712 @default.
• W4387343313 creator A5057246536 @default.
• W4387343313 creator A5083202633 @default.
• W4387343313 creator A5086605466 @default.
• W4387343313 date "2023-10-04" @default.
• W4387343313 modified "2023-10-18" @default.
• W4387343313 title "Impact of MBE-grown <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline overflow=scroll><mml:mo stretchy=false>(</mml:mo><mml:mi>In</mml:mi><mml:mo>,</mml:mo><mml:mi>Ga</mml:mi><mml:mo stretchy=false>)</mml:mo><mml:mi>As</mml:mi><mml:mo>/</mml:mo><mml:mrow><mml:mi>Ga</mml:mi><mml:mi>As</mml:mi></mml:mrow></mml:math> metamorphic buffers on excitonic and optical properties of single quantum dots with single-photon emission tuned to the telecom range" @default.
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