Work

Plasmonic Hinge Modes in Metal-Coated Nanolasers

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Plasmonic lasers have traditionally been built on flat metal substrates. Here, we introduce substrate-free plasmonic lasers created by coating semiconductor particles with an optically thin layer of noble metal. This architecture supports plasmonic “hinge” modes highly localized along the particle’s edges and corners, exhibiting Purcell factors exceeding 100 and Q-factors of 15–20 near the plasmon resonance frequency. We demonstrate hinge-mode lasing in submicron CsPbBr 3 perovskite cubes encapsulated with conformal 15-nm-thick gold shells. The lasing is achieved with 480-nm nanosecond pumping at 10 pJ/μm 2 through the translucent gold layer, producing a line width of 0.6 at 538 nm. Their rapidly decaying evanescent fields outside the gold coating show distinct sensitivities to long- and short-range external perturbations. Our results suggest the potential of these novel laser modes for sensing and imaging applications.

Source: Nano Letters

DOI: 10.1021/acs.nanolett.4c03485

Authors: Sangyeon Cho, Yi Yang, Marin Soljačić, Seok Hyun Yun

Institutions: Harvard University, Massachusetts General Hospital, Massachusetts Institute of Technology, University of Hong Kong

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,500

Funders: Massachusetts General Hospital, National Institute of Biomedical Imaging and Bioengineering, Army Research Office