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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Spatio-spectral localized modal coupling for room-temperature quantum coherence protection.

Wen-Jie Zhou1,2, Yu-Wei Lu3, Jing-Feng Liu4

  • 1Department of Science, Mathematics and Technology (SMT), Singapore University of Technology and Design (SUTD), 8 Somapah Road, Singapore 487372, Singapore.

Nanophotonics (Berlin, Germany)
|April 11, 2025
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Summary
This summary is machine-generated.

This study introduces a novel plasmonic system for room-temperature control of photonic qubits. The system enhances quantum coherence preservation, crucial for future quantum technologies.

Keywords:
coherencelocalized surface plasmonic resonancemodal couplingspatio-spectral localizedspectral hole-burningsurface lattice resonance

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Area of Science:

  • Nanophotonics
  • Quantum Information Science
  • Plasmonics

Background:

  • Photonic qubits are essential for quantum applications.
  • Maintaining qubit coherence at room temperature is a significant challenge.
  • Tailored nanophotonic systems can enhance light-matter interactions.

Purpose of the Study:

  • To develop a room-temperature spatio-spectral localized (SSL) system for photonic qubit manipulation.
  • To enhance coherence preservation in quantum applications.
  • To investigate the impact of system configuration on coherence protection.

Main Methods:

  • Designed an all-plasmonic SSL system using a gold bowtie array on a gold substrate.
  • Utilized collective lattice response of localized surface plasmon resonance (LSPR) and surface lattice resonance (SLR).
  • Enabled tunable modal coupling between LSPR and SLR for alignment with quantum emitters.

Main Results:

  • Achieved tunable modal coupling for precise alignment with quantum emitters.
  • Formed quasi-bound states across an energy range of 1.45-1.91 eV.
  • Investigated the influence of three-body coupling symmetry and modal-coupling strength on coherence protection.

Conclusions:

  • The developed SSL system offers flexibility for optimizing nanophotonic qubit manipulation.
  • Insights gained pave the way for advancements in ambient condition quantum applications.
  • This work contributes to the future of photonic quantum systems.