Gate-tunable optical extinction of graphene nanoribbon nanoclusters

Authors

Erin Sheridan, University of Pittsburgh, Pittsburgh Quantum Institute
Gang Li, University of Nebraska - LincolnFollow
Mamun Sarker, University of Nebraska-LincolnFollow
Shan Hao, University of Pittsburgh, Pittsburgh Quantum Institute
Ki-Tae Eom, University of Wisconsin-Madison
Chang-Beom Eom, University of Wisconsin-Madison
Alexander Sinitskii, University of Nebraska-LincolnFollow
Patrick Irvin, University of Pittsburgh, Pittsburgh Quantum Institute
Jeremy Levy, University of Pittsburgh, Pittsburgh Quantum Institute

Document Type

Article

Date of this Version

7-2-2021

Citation

APL Mater. 9, 071101 (2021); doi: 10.1063/5.0048795

Comments

© 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

Abstract

We investigate the optical response of graphene nanoribbons (GNRs) using the broadband nonlinear generation and detection capabilities of nanoscale junctions created at the LaAlO₃/SrTiO₃ interface. GNR nanoclusters measured to be as small as 1–2 GNRs in size are deposited on the LaAlO₃ surface with an atomic force microscope tip. Time-resolved nonlinear optical probes of GNR nanoclusters reveal a strong, gate-tunable second and third harmonic response, as well as strong extinction of visible to near-infrared light at distinct wavelengths, similar to previous reports with graphene.