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Updated: Nov 18, 2025
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
InP-Substrate-Based Quantum Dashes on a DBR as Single-Photon Emitters at the Third Telecommunication Window
Paweł Wyborski1, Anna Musiał1, Paweł Mrowiński1
1Laboratory for Optical Spectroscopy of Nanostructures, Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
We developed InAs/InGaAlAs/InP quantum dash photonic structures for efficient single-photon emission in the third telecommunication window, showing a 4x intensity enhancement and high extraction efficiency for quantum networks.
Area of Science:
- Optoelectronics and Photonics
- Quantum Information Science
- Semiconductor Nanostructures
Background:
- Development of efficient single-photon sources is crucial for quantum communication technologies.
- Photonic structures are essential for enhancing light-matter interactions and controlling light emission.
- The third telecommunication window (around 1550 nm) is vital for fiber-based quantum networks.
Purpose of the Study:
- To investigate the emission properties of InAs/InGaAlAs/InP quantum dash photonic structures.
- To demonstrate single-photon emission in the third telecommunication window.
- To enhance the light extraction efficiency of these quantum dash structures.
Main Methods:
- Growth of InAs/InGaAlAs/InP quantum dashes on a distributed Bragg reflector using molecular beam epitaxy.
- High-spatial-resolution photoluminescence spectroscopy to analyze emission properties.
- Fabrication of photonic structures, including cylindrical mesas, and electromagnetic field simulations.
Main Results:
- Observed well-resolved sharp spectral lines and detected single-photon emission with low multiphoton probabilities.
- Achieved a significant intensity enhancement of 4x in cylindrical mesa structures compared to planar samples.
- Simulations predicted emission extraction efficiencies exceeding 18% for optimized designs.
Conclusions:
- The developed quantum dash photonic structures exhibit promising single-photon emission characteristics in the third telecommunication window.
- The fabrication approach is relatively simple and undemanding, making the structures competitive for practical applications.
- These structures are prospective for efficient and practical single-photon sources in fiber-based quantum networks.
