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This study demonstrates electrically tunable biexciton emission at 1.3 microns from InAs/InGaAs quantum dot molecules, achieving strong quantum coherence (g(2)(0) = 0.017) essential for O-band telecommunications applications. The work establishes a scalable synthesis method that maps structural and optical properties to enable precise control over correlated photon pairs for integration with fiber optics and silicon nanophotonic platforms.

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Quantum dots show biexciton emission at 1.3 microns

Quantum ZeitgeistOctober 1, 20264 min read

Researchers observed biexciton emission at 1.3 microns from InAs/InGaAs quantum dot molecules, demonstrating electrically tunable orbital coupling.

Researchers have identified biexciton emission at 1.3 microns from InAs/InGaAs quantum dot molecules, a wavelength important for applications using the "O-band" of telecommunications. The work demonstrates single-photon emission with a measured g(2)(0) = 0.017 ± 0.002, indicating strong quantum coherence suitable for advanced communication protocols. By electrically tuning a static electric field along the growth axis, the team observed positively charged exciton complexes sequentially emerging, revealing how electrons escape the system while holes remain trapped within these unique structures. The fabrication of InAs/InGaAs quantum dot molecules with…

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