1.7k citations · 2.6k across the 15 of their papers we have counts for
20 papers
Extreme mid-infrared field enhancement and anapoles in high-index plasmonic metamaterials
Zoltan Sztranyovszky, Nicolas Spiesshofer, Caleb Todd +5
High-refractive-index materials underpin a wide range of optical technologies, including communications, imaging, lasers, and integrated photonic systems. Here, we demonstrate a se…
Near-Field Vibrational Energy Transfer for Mid-Infrared Upconversion in Plasmonic Nanogaps
Avisekh Pal, Anju Sajan, Christopher Sumner +3
Förster energy transfer underpins modern photonics, yet establishing an analogous vibrational pathway in the mid-infrared (MIR) remains highly challenging, as sub-picosecond intram…
Mid-infrared Assisted THz Phonon Amplification in a 2D Semiconductor for Room Temperature Detection
Christopher Sumner, Jakob Ziewer, Anju Sajan +2
Efficient and selective excitation of lattice vibrations is central to controlling energy flow at the nanoscale, yet remains challenging under conventional optical excitation. Here…
Raman-probing the local ultrastrong coupling of vibrational plasmon-polaritons on metallic gratings
Rakesh Arul, Kishan Menghrajani, Marie S. Rider +3
Strong coupling of molecular vibrations with light creates polariton states, enabling control over many optical and chemical properties. However, the near-field signatures of stron…
Boosting Optical Nanocavity Coupling by Retardation Matching to Dark Modes
Rohit Chikkaraddy, Junyang Huang, Dean Kos +5
Plasmonic nano-antennas can focus light to nanometre length-scales providing intense field enhancements. For the tightest optical confinements (0.5-5 nm) achieved in plasmonic gaps…
Giant mid-IR resonant coupling to molecular vibrations in sub-nm gaps of plasmonic multilayer metafilms
Rakesh Arul, David Benjamin-Grys, Rohit Chikkaraddy +5
Nanomaterials capable of confining light are desirable for enhancing spectroscopies such as Raman scattering, infrared absorption, and nonlinear optical processes. Plasmonic superl…
Single-molecule mid-IR detection through vibrationally-assisted luminescence
Rohit Chikkaraddy, Rakesh Arul, Lukas A. Jakob +1
Room temperature detection of molecular vibrations in the mid-infrared (MIR, =3-30m) has numerous applications including real-time gas sensing, chemical reactivity, medical…
Mid-infrared-perturbed Molecular Vibrational Signatures in Plasmonic Nanocavities
Rohit Chikkaraddy, Angelos Xomalis, Lukas A. Jakob +1
Recent developments in surface-enhanced Raman scattering (SERS) enable observation of single-bond vibrations in real-time at room temperature. By contrast, mid-infrared (MIR) vibra…
Accessing Plasmonic Hotspots using Nanoparticle-on-Foil Constructs
Rohit Chikkaraddy, Jeremy J Baumberg
Metal-insulator-metal (MIM) nanogaps in canonical nanoparticle-on-mirror geometry (NPoM) provide deep-subwavelength confinement of light with mode volumes smaller than …
Detecting mid-infrared light by molecular frequency upconversion with dual-wavelength hybrid nanoantennas
Angelos Xomalis, Xuezhi Zheng, Rohit Chikkaraddy +6
Coherent interconversion of signals between optical and mechanical domains is enabled by optomechanical interactions. Extreme light-matter coupling produced by confining light to n…
Breaking the Selection Rules of Spin-Forbidden Molecular Absorption in Plasmonic Nanocavities
Oluwafemi S. Ojambati, William M. Deacon, Rohit Chikkaraddy +6
Controlling absorption and emission of organic molecules is crucial for efficient light-emitting diodes, organic solar cells and single-molecule spectroscopy. Here, a new molecular…
Plasmonic nanocavity modes: From near-field to far-field radiation
Nuttawut Kongsuwan, Angela Demetriadou, Matthew Horton +3
In the past decade, advances in nanotechnology have led to the development of plasmonic nanocavities which facilitate light-matter strong coupling in ambient conditions. The most r…
Ultrafast long-range energy transport via light-matter coupling in organic semiconductor films
Raj Pandya, Richard Y. S. Chen, Qifei Gu +29
The formation of exciton-polaritons allows the transport of energy over hundreds of nanometres at velocities up to 10^6 m s^-1 in organic semiconductors films in the absence of ext…
Large-scale dynamic assembly of metal nanostructures in plasmofluidic field
Partha Pratim Patra, Rohit Chikkaraddy, Sreeja Thampi +2
We discuss two aspects of the plasmofluidic assembly of plasmonic nanostructures at the metal fluid interface. First, we experimentally show how three and four spot evanescent wave…
Plasmofluidic Single-Molecule Surface Enhanced Raman Scattering from Dynamic Assembly of Plasmonic Nanoparticles
Partha Pratim Patra, Rohit Chikkaraddy, Ravi P. N. Tripathi +2
Single-molecule surface enhanced Raman scattering (SM-SERS) is one of the vital applications of plasmonic nanoparticles. The SM-SERS sensitivity critically depends on plasmonic hot…
Mapping nanoscale hotspots with single-molecule emitters assembled into plasmonic nanocavities using DNA origami
Rohit Chikkaraddy, V. A. Turek, Nuttawut Kongsuwan +8
Fabricating nanocavities in which optically-active single quantum emitters are precisely positioned, is crucial for building nanophotonic devices. Here we show that self-assembly b…
Strong-coupling of WSe2 in ultra-compact plasmonic nanocavities at room temperature
Marie-Elena Kleemann, Rohit Chikkaraddy, Evgeny M. Alexeev +9
Strong-coupling of monolayer metal dichalcogenide semiconductors with light offers encouraging prospects for realistic exciton devices at room temperature. However, the nature of t…
Suppressed Quenching and Strong Coupling of Purcell-Enhanced Single-Molecule Emission in Plasmonic Nanocavities
Nuttawut Kongsuwan, Angela Demetriadou, Rohit Chikkaraddy +5
An emitter in the vicinity of a metal nanostructure is quenched by its decay through non-radiative channels, leading to the belief in a zone of inactivity for emitters placed withi…
Anomalous spectral shift of near- and far-field plasmonic resonances in nano-gaps
Anna Lombardi, Angela Demetriadou, Lee Weller +5
The near-field and far-field spectral response of plasmonic systems are often assumed to be identical, due to the lack of methods that can directly compare and correlate both respo…
Generalized circuit model for coupled plasmonic systems
Felix Benz, Bart de Nijs, Christos Tserkezis +6
We develop an analytic circuit model for coupled plasmonic dimers separated by small gaps that provides a complete account of the optical resonance wavelength. Using a suitable equ…