JOURNAL ARTICLE

Probing near-field heating effects on monolayer MoS2 photoluminescence via tip-enhanced Raman spectroscopy.

  • Published In: Applied Physics Letters, 2025, v. 126, n. 12. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Madapu, Kishore K.; Bhuyan, C. Abinash; Dhara, Sandip 3 of 3

Abstract

This article investigates the impact of near-field heating caused by surface plasmon resonance (SPR) on the photoluminescence (PL) intensity of monolayer molybdenum disulfide (MoS₂), a two-dimensional transition metal dichalcogenide (TMD). Using tip-enhanced Raman spectroscopy (TERS) and tip-enhanced photoluminescence (TEPL), the study reveals that local temperature near the plasmonic tip can increase by approximately 147 °C at a laser power of 10.57 mW, leading to a nearly tenfold difference between Raman and PL enhancement factors (EFs). The research further demonstrates that substrates with high thermal conductivity, such as copper, effectively mitigate near-field heating effects compared to SiO₂ substrates, thereby improving PL enhancement. These findings highlight the critical role of thermal management in optimizing SPR-based optical enhancements in 2D materials.

Additional Information

  • Source:Applied Physics Letters. 2025/03, Vol. 126, Issue 12, p1
  • Document Type:Article
  • Subject Area:Physics
  • Publication Date:2025
  • ISSN:0003-6951
  • DOI:10.1063/5.0250931
  • Accession Number:185066679
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