TY - JOUR
AU - Daehan Yoo
AU - Fernando de León-Pérez
AU - Matthew Pelton
AU - In-Ho Lee
AU - Daniel Mohr
AU - Markus Raschke
AU - Joshua Caldwell
AU - Luis Martín-Moreno
AU - Sang-Hyun Oh
AB - Vibrational ultrastrong coupling, where the light–matter coupling strength is comparable to the vibrational frequency of molecules, presents new opportunities to probe the interactions between molecules and zero-point fluctuations, harness cavity-modified chemical reactions and develop novel devices in the mid-infrared spectral range. Here we use epsilon-near-zero nanocavities filled with a model polar medium (SiO2) to demonstrate ultrastrong coupling between phonons and gap plasmons. We present classical and quantum-mechanical models to quantitatively describe the observed plasmon–phonon ultrastrong coupling phenomena and demonstrate a modal splitting of up to 50% of the resonant frequency (normalized coupling strength η > 0.25). Our wafer-scale nanocavity platform will enable a broad range of vibrational transitions to be harnessed for ultrastrong coupling applications.
BT - Nature Photonics
DA - 2020-12
DO - 10.1038/s41566-020-00731-5
N2 - Vibrational ultrastrong coupling, where the light–matter coupling strength is comparable to the vibrational frequency of molecules, presents new opportunities to probe the interactions between molecules and zero-point fluctuations, harness cavity-modified chemical reactions and develop novel devices in the mid-infrared spectral range. Here we use epsilon-near-zero nanocavities filled with a model polar medium (SiO2) to demonstrate ultrastrong coupling between phonons and gap plasmons. We present classical and quantum-mechanical models to quantitatively describe the observed plasmon–phonon ultrastrong coupling phenomena and demonstrate a modal splitting of up to 50% of the resonant frequency (normalized coupling strength η > 0.25). Our wafer-scale nanocavity platform will enable a broad range of vibrational transitions to be harnessed for ultrastrong coupling applications.
PY - 2020
SN - 1749-4893
EP - 125–130
T2 - Nature Photonics
TI - Ultrastrong plasmon–phonon coupling via epsilon-near-zero nanocavities
UR - https://doi.org/10.1038/s41566-020-00731-5
VL - 15
ER -