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Plasmonic superconducting nanowire single photon detector.

Amin Eftekharian¹, Haig Atikian, A Hamed Majedi

¹ECE Department, University of Waterloo, 200 University Ave West, Waterloo, ON, Canada, N2L 3G1.

|March 14, 2013

Summary

This study proposes a new method to boost superconducting single photon detector efficiency by using plasmonics for better light absorption. This approach enhances quantum efficiency without altering detector size.

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Area of Science:

Quantum Optics
Materials Science
Nanotechnology

Background:

Superconducting single photon detectors (SSPDs) are crucial for quantum information science.
Enhancing quantum efficiency (QE) is vital for improving detector performance.
Current methods often require larger detector footprints.

Purpose of the Study:

To propose a theoretical framework for enhancing the quantum efficiency of meander-line SSPDs.
To investigate the use of plasmonic effects in superconducting layers for increased optical absorption.
To introduce a design coefficient for balancing optical guiding and detection mechanisms.

Main Methods:

Theoretical analysis of light-matter interaction in superconducting meander-line structures.
Modeling the plasmonic enhancement of surface absorption.

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Developing a coefficient to manage the transition between current crowding and vortex-based detection.

Main Results:

Demonstrated potential for increased surface absorption of optical signals via plasmonic effects.
Proposed a method to enhance QE without increasing detector dimensions.
Introduced a design coefficient for optimizing detector sensitivity across different operating regimes.

Conclusions:

Plasmonic engineering offers a viable route to enhance SSPD quantum efficiency.
The proposed theoretical approach provides a pathway for developing more sensitive and compact SSPDs.
Further experimental validation is needed to confirm the theoretical predictions.