Work

Millimeter-Scale Spatial Coherence from a Plasmon Laser

Year: 2017

Type: article

Abstract: Coherent light sources have been demonstrated based on a wide range of nanostructures, however, little effort has been devoted to probing their underlying coherence properties. Here, we report long-range spatial coherence of lattice plasmon lasers constructed from a periodic array of gold nanoparticles and a liquid gain medium at room temperature. By combining spatial and temporal interferometry, we demonstrate millimeter-scale (∼1 mm) spatial coherence and picosecond (∼2 ps) temporal coherence. The long-range spatial coherence occurs even without the presence of strong coupling with the lattice plasmon mode extending over macroscopic distances in the lasing regime. This plasmonic lasing system thus provides a platform for understanding the emergence of long-range coherence from collections of nanoscale resonators and points toward novel types of distributed lasing sources.

Source: Nano Letters

DOI: 10.1021/acs.nanolett.7b02677

Authors: Thang B. Hoang, Gleb M. Akselrod, Ankun Yang, Teri W. Odom, Maiken H. Mikkelsen

Institutions: Northwestern University, Duke University

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: Division of Materials Research, Air Force Office of Scientific Research