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Room Temperature Quantum Emitters in van der Waals α-MoO3
Jeonghan Lee1,2, Haiyuan Wang3, Keun-Yeol Park1
1Department of Physics and Astronomy, Seoul National University, 08826 Seoul, Korea.
Nano Letters
|January 13, 2025
Summary
Researchers generated room temperature single-photon emission from van der Waals $\alpha$-MoO3. This discovery offers a new pathway for developing quantum information science technologies using two-dimensional materials.
Area of Science:
- Quantum Information Science
- Solid-State Physics
- Materials Science
Background:
- Solid-state quantum emitters are crucial for quantum information processing.
- Van der Waals materials like transition metal dichalcogenides and hexagonal boron nitride show potential for 2D photonic quantum technologies.
Purpose of the Study:
- To report room temperature single-photon emission from van der Waals $\alpha$-MoO3.
- To investigate the potential of $\alpha$-MoO3 as a quantum emitter for photonic quantum technologies.
Main Methods:
- Exfoliation and thermal annealing of single crystals of van der Waals $\alpha$-MoO3.
- Measurement of second-order correlation function to confirm single-photon emission.
- Luminescence intensity measurements and stability tests under laser excitation.
- Theoretical calculations to identify the origin of the emitters.
Main Results:
- Generation of room temperature single-photon emission from exfoliated and annealed $\alpha$-MoO3.
- Clear photon antibunching observed, confirming single-photon emission.
- High luminescence intensity (>0.4 Mcts/s) and photostability under laser excitation.
- Theoretical calculations suggest oxygen vacancy defects as likely emitters.
Conclusions:
- Van der Waals $\alpha$-MoO3 hosts bright and photostable quantum emitters.
- These emitters operate at room temperature, simplifying potential applications.
- $\alpha$-MoO3 presents a novel platform for advancing photon-based quantum information science in 2D materials.
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