TY - JOUR
T1 - Tunable and low-loss correlated plasmons in Mott-like insulating oxides
AU - Asmara, Teguh Citra
AU - Wan, Dongyang
AU - Zhao, Yongliang
AU - Majidi, Muhammad Aziz
AU - Nelson, Christopher T.
AU - Scott, Mary C.
AU - Cai, Yao
AU - Yan, Bixing
AU - Schmidt, Daniel
AU - Yang, Ming
AU - Zhu, Tao
AU - Trevisanutto, Paolo E.
AU - Motapothula, Mallikarjuna R.
AU - Feng, Yuan Ping
AU - Breese, Mark B.H.
AU - Sherburne, Matthew
AU - Asta, Mark
AU - Minor, Andrew
AU - Venkatesan, T.
AU - Rusydi, Andrivo
N1 - Publisher Copyright:
© The Author(s) 2017.
PY - 2017/5/12
Y1 - 2017/5/12
N2 - Plasmonics has attracted tremendous interests for its ability to confine light into subwavelength dimensions, creating novel devices with unprecedented functionalities. New plasmonic materials are actively being searched, especially those with tunable plasmons and low loss in the visible-ultraviolet range. Such plasmons commonly occur in metals, but many metals have high plasmonic loss in the optical range, a main issue in current plasmonic research. Here, we discover an anomalous form of tunable correlated plasmons in a Mott-like insulating oxide from the Sr 1-x Nb 1-y O 3+δ family. These correlated plasmons have multiple plasmon frequencies and low loss in the visible-ultraviolet range. Supported by theoretical calculations, these plasmons arise from the nanometre-spaced confinement of extra oxygen planes that enhances the unscreened Coulomb interactions among charges. The correlated plasmons are tunable: They diminish as extra oxygen plane density or film thickness decreases. Our results open a path for plasmonics research in previously untapped insulating and strongly-correlated materials.
AB - Plasmonics has attracted tremendous interests for its ability to confine light into subwavelength dimensions, creating novel devices with unprecedented functionalities. New plasmonic materials are actively being searched, especially those with tunable plasmons and low loss in the visible-ultraviolet range. Such plasmons commonly occur in metals, but many metals have high plasmonic loss in the optical range, a main issue in current plasmonic research. Here, we discover an anomalous form of tunable correlated plasmons in a Mott-like insulating oxide from the Sr 1-x Nb 1-y O 3+δ family. These correlated plasmons have multiple plasmon frequencies and low loss in the visible-ultraviolet range. Supported by theoretical calculations, these plasmons arise from the nanometre-spaced confinement of extra oxygen planes that enhances the unscreened Coulomb interactions among charges. The correlated plasmons are tunable: They diminish as extra oxygen plane density or film thickness decreases. Our results open a path for plasmonics research in previously untapped insulating and strongly-correlated materials.
UR - http://www.scopus.com/inward/record.url?scp=85019219865&partnerID=8YFLogxK
U2 - 10.1038/ncomms15271
DO - 10.1038/ncomms15271
M3 - Article
C2 - 28497786
AN - SCOPUS:85019219865
SN - 2041-1723
VL - 8
JO - Nature Communications
JF - Nature Communications
M1 - 15271
ER -