• Photonics Research
  • Vol. 9, Issue 9, 1699 (2021)
Zhe Zhang1, Leona Nest1、2, Suo Wang1, Si-Yi Wang1, and Ren-Min Ma1、3、4、*
Author Affiliations
  • 1State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
  • 2Department of Physics, Free University Berlin, Berlin 14195, Germany
  • 3Frontiers Science Center for Nano-optoelectronics & Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • 4Yangtze Delta Institute of Optoelectronics, Peking University, Nantong 226010, China
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    DOI: 10.1364/PRJ.431612 Cite this Article
    Zhe Zhang, Leona Nest, Suo Wang, Si-Yi Wang, Ren-Min Ma. Lasing-enhanced surface plasmon resonance spectroscopy and sensing[J]. Photonics Research, 2021, 9(9): 1699 Copy Citation Text show less

    Abstract

    Surface plasmon resonance (SPR) sensors are a prominent means to detect biological and chemical analytes and to investigate biomolecular interactions in various fields. However, the performance of SPR sensors is ultimately limited by ohmic loss, which substantially weakens the resonance signal and broadens the response linewidth. Recent studies have shown that ohmic loss can be fully compensated in plasmonic nanolasers, which leads to a novel class of lasing-enhanced surface plasmon resonance (LESPR) sensors with improved sensing performance. In this paper, we detail the underlying physical mechanisms of LESPR sensors and present their implementation in various sensing devices. We review recent progress on their applications, particularly for refractive index sensing, gas detection and biological imaging, labeling, tracking, and diagnosis. We then summarize the review and highlight remaining challenges of LESPR sensing technology.

    1. INTRODUCTION

    Surface plasmon polaritons (SPPs) are transverse-magnetic (TM) surface waves propagating along a conductor–dielectric interface. They are excited through coupling electromagnetic fields to electron plasma oscillations in the conductor [1]. These surface waves exponentially decay in both media and have their maximum amplitude at the interface. Because of the strong localization, they are highly sensitive to changes in the surface dielectric environment. In surface plasmon resonance (SPR) sensors, this sensitivity is exploited to detect minute changes of the dielectric’s refractive index, which enables noncontact, real-time, and label-free sensing and detection.

    Zhe Zhang, Leona Nest, Suo Wang, Si-Yi Wang, Ren-Min Ma. Lasing-enhanced surface plasmon resonance spectroscopy and sensing[J]. Photonics Research, 2021, 9(9): 1699
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