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| Open AccessUltrastrong exciton-plasmon couplings in WS2 multilayers synthesized with a random multi-singular metasurface at room temperature
Here, the authors fabricate a metasurface with nanometre-sized plasmonic hotspots that interact coherently with WS2 excitons, achieving ultrastrong exciton-plasmon coupling.
- Tingting Wu
- , Chongwu Wang
- & Yu Luo
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Article
| Open AccessGiant optical polarisation rotations induced by a single quantum dot spin
Light-matter interfaces implementing arbitrary conditional operations on incoming photons would have several applications in quantum computation and communications. Here, the authors demonstrate conditional polarization rotation induced by a single quantum dot spin embedded in an electrically contacted micropillar, spanning up to a pi flip.
- E. Mehdi
- , M. Gundín
- & L. Lanco
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Article
| Open AccessTheory predicts 2D chiral polaritons based on achiral Fabry–Pérot cavities using apparent circular dichroism
2D chiral polaritons are light-matter states with select angular momentum holding technological promise. Here, the authors present the theory of such states, and propose their realisation based on a phenomenon called “apparent circular dichroism”.
- Andrew H. Salij
- , Randall H. Goldsmith
- & Roel Tempelaar
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| Open AccessQuantum plasmonics pushes chiral sensing limit to single molecules: a paradigm for chiral biodetections
Chiroptic sensing of single molecule is extremely challenging. Here the authors unveil an extreme nanophotonic system based on nanoparticle-on-mirror shows exceptional high sensitivity of chiral supramolecules, which can resolve enantiomer access of a racemate monolayer, exhibiting great potential for single chiral molecule sensing.
- Chi Zhang
- , Huatian Hu
- & Tao Ding
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| Open AccessProbing optical anapoles with fast electron beams
Optical anapoles in nanoresonators result in strong suppression of the electromagnetic radiation, which is challenging to detect in ideal settings. Here, the authors show that fast electrons are a powerful tool to circumvent this challenge due to their ability to access dark modes.
- Carlos Maciel-Escudero
- , Andrew B. Yankovich
- & Timur O. Shegai
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| Open AccessTunable Tamm plasmon cavity as a scalable biosensing platform for surface enhanced resonance Raman spectroscopy
The researchers present a scalable Tamm plasmon cavity using phase change material with large resonance tunability and demonstrated tunable SERS by matching the plasmonic resonance with the molecule absorption for sensitivity enhanced biosensing.
- Kandammathe Valiyaveedu Sreekanth
- , Jayakumar Perumal
- & Jinghua Teng
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Article
| Open AccessHigh-Q lasing via all-dielectric Bloch-surface-wave platform
Integrating coherent light sources on surface wave platforms would offer opportunities for sensing and data processing. The authors realize a microfabricated coherent light source based on the stimulated emission of a guided Bloch surface wave mode.
- Yang-Chun Lee
- , Ya-Lun Ho
- & Jean-Jacques Delaunay
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| Open AccessPhotoluminescence upconversion in monolayer WSe2 activated by plasmonic cavities through resonant excitation of dark excitons
Here, the authors perform statistical measurements on hundreds of plasmonic nano-cavities embedding WSe2 monolayers, and show the activation of anti-Stokes photoluminescence in WSe2 through resonant excitation of a dark exciton at room temperature.
- Niclas S. Mueller
- , Rakesh Arul
- & Jeremy J. Baumberg
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| Open AccessCharged biexciton polaritons sustaining strong nonlinearity in 2D semiconductor-based nanocavities
Here, the authors perform a spectroscopic study of monolayer WS2 coupled to a silver nanocavity and show the emergence of resonances in reflectance contrast measurements, which they attribute to exciton- (X), trion- (T) and charged biexciton- (XX-) polaritons, sustaining strong nonlinearity.
- Ke Wei
- , Qirui Liu
- & Tian Jiang
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Article
| Open AccessOver-coupled resonator for broadband surface enhanced infrared absorption (SEIRA)
Nanoresonator is proven to be an excellent platform for molecular detection, yet a set of them is necessary to identify a molecule fingerprint. Here, the authors utilise low quality resonators with large radiative losses, despite its lower quality factor, to identify molecular absorption spectrum between 5 and 10 μm.
- Laura Paggi
- , Alice Fabas
- & Patrick Bouchon
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Article
| Open AccessSuperscattering emerging from the physics of bound states in the continuum
The scattering of light by small particles plays a central role in a myriad of fields. Here, the authors demonstrate a super dipole resonance that arises when two resonant modes of a small particle interfere, overcoming a widely accepted limitation to the cross section.
- Adrià Canós Valero
- , Hadi K. Shamkhi
- & Alexander S. Shalin
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Article
| Open AccessFano resonant optical coatings platform for full gamut and high purity structural colors
Fano resonant optical coatings (FROCs) present an ideal platform for structural coloring from thin-film metamaterials. This platform provides full-color gamut coverage at greater than 61% of the CIE gamut, with exceptionally high purity (up to 99%) and high brightness. FROCs exhibit tunable iridescence, cost-effective and scalable manufacturing, and significant advantages over existing structural coloring schemes.
- Mohamed ElKabbash
- , Nathaniel Hoffman
- & Chunlei Guo
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Article
| Open AccessGiant optomechanical spring effect in plasmonic nano- and picocavities probed by surface-enhanced Raman scattering
Extreme confinement of light in plasmonic nanocavities strongly enhances the optomechanical coupling of light with molecular vibrations. Here, the authors use a giant optical spring effect to reversibly weaken molecular bonds.
- Lukas A. Jakob
- , William M. Deacon
- & Jeremy J. Baumberg
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| Open AccessUncovering temperature-dependent exciton-polariton relaxation mechanisms in hybrid organic-inorganic perovskites
Exciton-polaritons present opportunities for quantum photonics, next generation qubits, and tuning material photophysics. Here Laitz et al. study the temperature dependence of 2D perovskite microcavity polaritons, revealing material-specific relaxation mechanisms towards the control of polariton momentum.
- Madeleine Laitz
- , Alexander E. K. Kaplan
- & Vladimir Bulović
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| Open AccessControlling single rare earth ion emission in an electro-optical nanocavity
Probing single rare earth ions is highly desirable for several quantum applications, but it is difficult due to low emission rates. Here, the authors demonstrate the detection and control of single Erbium ions emission using electro-optically active photonic crystal cavities patterned from thin-film lithium niobate.
- Likai Yang
- , Sihao Wang
- & Hong X. Tang
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| Open AccessMetasurface-stabilized optical microcavities
Microcavities concentrate light in tiny volumes and are important, e.g., for semiconductor lasers and nonlinear optics. In this paper, metasurfaces are introduced to realize microcavities with arbitrary mode profiles.
- Marcus Ossiander
- , Maryna Leonidivna Meretska
- & Federico Capasso
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| Open AccessNanometer-scale photon confinement in topology-optimized dielectric cavities
Here, the authors integrate measured fabrication constraints in topology optimization to design a highly optimized dielectric nanocavity. The theoretically predicted confinement of light below the diffraction limit is confirmed by near- and far-field spectroscopy.
- Marcus Albrechtsen
- , Babak Vosoughi Lahijani
- & Søren Stobbe
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| Open AccessEnabling scalable optical computing in synthetic frequency dimension using integrated cavity acousto-optics
Synthetic frequency dimension from light modulation enables scalable optical computing. The authors show an efficient silicon-based acousto-optic modulator that generates large synthetic frequency lattices and performs matrix-vector multiplications.
- Han Zhao
- , Bingzhao Li
- & Mo Li
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| Open AccessActive electrochemical high-contrast gratings as on/off switchable and color tunable pixels
Two key display operations, color tuning and on/off switching, are achieved with reflective structural colors by changing the modal interference conditions and absorption via electrochemical control of Cu occupancy inside dielectric grating slits.
- Cheon Woo Moon
- , Youngji Kim
- & Jerome Kartham Hyun
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| Open AccessHighly efficient nonlinear optical emission from a subwavelength crystalline silicon cuboid mediated by supercavity mode
Enhancing the efficiency of quantum emitters is essential for exploring new functionalities. Here the authors show Si cuboids that sustain bound states in the continuum enable the injection of dense electron-hole plasma and provide high quantum efficiency.
- Mingcheng Panmai
- , Jin Xiang
- & Sheng Lan
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| Open AccessBright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas
Single photon emitters (SPEs) in 2D semiconductors can be deterministically positioned using localized strain induced by underlying nanostructures. Here, the authors show SPE coupling in WSe2 to GaP dielectric nanoantennas, substantially increasing quantum efficiency and photoluminescence brightness.
- Luca Sortino
- , Panaiot G. Zotev
- & Alexander I. Tartakovskii
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| Open AccessLight-induced symmetry breaking for enhancing second-harmonic generation from an ultrathin plasmonic nanocavity
In nanoplasmonic systems symmetry can often suppress the second harmonic generation (SHG) is spite of the highly enhanced fields. Here, the authors demonstrate light-induced symmetry breaking that enables strong SHG enhancement from symmetric nanophotonic systems with certain properties.
- Guang-Can Li
- , Dangyuan Lei
- & Anatoly V. Zayats
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Article
| Open AccessImpact of cavity on interatomic Coulombic decay
Interatomic Coulombic decay, ICD, is commonly observed in systems weakly bound to different environments. Here the authors discuss the ICD in an electromagnetic cavity and show that the entanglement of atoms can change ICD rates substantially and be used to control the ICD process.
- Lorenz S. Cederbaum
- & Alexander I. Kuleff
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| Open AccessUltra-high-Q resonances in plasmonic metasurfaces
Metallic nanostructures are useful in many optical devices due to their nonlinear properties and responses to interaction with light. Here the authors demonstrate a metasurface of gold nanoparticle arrays with ultra-narrow surface lattice resonances of high quality-factor that operates in the telecommunication band.
- M. Saad Bin-Alam
- , Orad Reshef
- & Ksenia Dolgaleva
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| Open AccessEdge-oriented and steerable hyperbolic polaritons in anisotropic van der Waals nanocavities
The possibility to manipulate the propagation of polaritons is limited by the isotropy of 2D materials like graphene and hexagonal boron nitride. Here, the authors exploit the anisotropy of α-MoO3 and study edge tailored hyperbolic polariton manipulation in α-MoO3 nanocavities via real space nanoimaging.
- Zhigao Dai
- , Guangwei Hu
- & Qiaoliang Bao
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Article
| Open AccessOptical probes of molecules as nano-mechanical switches
The development of molecular electronics at single molecule level calls for new tools beyond electrical characterisation. Kos et al. show an optical probe of molecular junctions in a plasmonic nanocavity geometry, which supports in situ interrogation of molecular configurations.
- Dean Kos
- , Giuliana Di Martino
- & Jeremy J. Baumberg
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Article
| Open AccessMolecular motor-functionalized porphyrin macrocycles
Molecular motors and switches change conformation under the influence of an external stimulus and can be incorporated into functional systems, allowing the construction of adaptive materials and switchable catalysts. Here, the authors present two molecular motor-functionalized porphyrin macrocycles for future photo-switchable catalysis.
- Pieter J. Gilissen
- , Paul B. White
- & Roeland J. M. Nolte
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| Open AccessImage polaritons in boron nitride for extreme polariton confinement with low losses
The tight confinement of polaritons in 2D materials leads to increased optical losses. Here, the authors demonstrate image phonon polariton modes in hexagonal boron nitride with an antisymmetric charge distribution that feature quality factors of up to 501 and an effective index of 132.
- In-Ho Lee
- , Mingze He
- & Sang-Hyun Oh
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Article
| Open AccessTwo-dimensional optomechanical crystal cavity with high quantum cooperativity
The authors demonstrate a two-dimensional optomechanical crystal cavity which traps a phonon mode within a phononic bandgap while yielding large thermal conductivity to the environment. High quantum cooperativity at millikelvin temperatures is realized, suitable for quantum coherent control.
- Hengjiang Ren
- , Matthew H. Matheny
- & Oskar Painter
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| Open AccessOvercoming evanescent field decay using 3D-tapered nanocavities for on-chip targeted molecular analysis
Plasmon-enhanced fluorescence is strictly dependent on molecule size and surface position, restricting application of diversely sized molecules. Here, the authors overcome this by introducing a 3D tapered gap plasmon nanocavity with fluidic access and near homogeneous confinement of the electromagnetic fields.
- Shailabh Kumar
- , Haeri Park
- & Hyuck Choo
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| Open AccessUltrastrong coupling between nanoparticle plasmons and cavity photons at ambient conditions
Achieving ultrastrong coupling requires demanding experimental conditions such as cryogenic temperatures, strong magnetic fields, and high vacuum. Here, the authors use plasmon-microcavity polaritons to achieve ultrastrong coupling at ambient conditions and without the use of magnetic fields.
- Denis G. Baranov
- , Battulga Munkhbat
- & Timur Shegai
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| Open AccessUnveiling the radiative local density of optical states of a plasmonic nanocavity by STM
Disentangling the radiative and non-radiative plasmon mode contributions to the total photonic density of states is a challenge. Here, the authors report a procedure to eliminate the electronic-structure factors from scanning tunnelling microscope luminescence spectra to isolate the radiative component.
- Alberto Martín-Jiménez
- , Antonio I. Fernández-Domínguez
- & Roberto Otero
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| Open AccessFlickering nanometre-scale disorder in a crystal lattice tracked by plasmonic flare light emission
Dynamic restructuring of metal nanoparticle surfaces greatly influences their catalytic, electronic transport, and chemical binding functionalities. Here, the authors show that non-equilibrium atomic-scale lattice defects can be detected in nanoparticles by using nano-optics at the sub-5nm scale.
- Cloudy Carnegie
- , Mattin Urbieta
- & Jeremy J. Baumberg
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| Open AccessSynchronously wired infrared antennas for resonant single-quantum-well photodetection up to room temperature
Applications of metasurfaces for optoelectronic devices require wiring to each isolated antenna for biasing and current flow. Here, the authors report optimal wire interconnects design for controlling the optical properties and present antenna-enhanced mid-infrared photodetection incorporating a single quantum well.
- Hideki T. Miyazaki
- , Takaaki Mano
- & Hiroshi Miyazaki
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| Open AccessVacuum Rabi splitting of a dark plasmonic cavity mode revealed by fast electrons
Dark plasmonic modes fare better in some applications due to longer lifetimes but, being subradiant, are difficult to probe. The authors apply electron energy loss spectroscopy to demonstrate that a dark mode of a plasmonic cavity can couple with a few quantum emitters to exhibit vacuum Rabi splitting.
- Ora Bitton
- , Satyendra Nath Gupta
- & Gilad Haran
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| Open AccessCooperative excitonic quantum ensemble in perovskite-assembly superlattice microcavities
The realization and control many-body quantum states in perovskites would extend their application to ultrafast quantum operation. Here, the authors generate a cooperative quantum state of excitons in a lead halide perovskite quantum dot ensemble and control the ultrafast radiation through optical microcavites.
- Chun Zhou
- , Yichi Zhong
- & Wei Xie
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| Open AccessTowards full-colour tunability of inorganic electrochromic devices using ultracompact fabry-perot nanocavities
Electrochromic devices are generally not capable of tuning more than one color. Here, the authors use Fabry-Perot nanocavities to create electrochromic devices with a wide color tuning range and vibrant color.
- Zhen Wang
- , Xiaoyu Wang
- & Zhigang Zhao
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| Open AccessEnhanced light-matter interaction in an atomically thin semiconductor coupled with dielectric nano-antennas
Dielectric nano-antennas may be used as a platform for boosting light-matter coupling in 2D semiconductors. Here, the authors demonstrate the coupling of atomically thin WSe\({}_{2}\) with low-loss, high-refractive-index GaP nano-antennas and observe a 10000-fold WSe\({}_{2}\) photoluminescence enhancement.
- L. Sortino
- , P. G. Zotev
- & A. I. Tartakovskii
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Article
| Open AccessUltrahigh resolution and color gamut with scattering-reducing transmissive pixels
Tradeoffs between size and performance have limited plasmonic structural color vibrancy at high resolution. Here the authors present a nanophotonic resonant metal-coated nanowire capable of being used as a size invariant, vibrant multicolor pixel.
- June Sang Lee
- , Ji Yeon Park
- & Jerome K. Hyun
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Article
| Open AccessModeling and observation of mid-infrared nonlocality in effective epsilon-near-zero ultranarrow coaxial apertures
Nonlocality is typically studied in simplified 2D or symmetric 3D structures and the ability to perform nonlocal simulations for complex 3D structures is lacking. Here the authors examine non-local optical effects in small gaps and its effect on the optical response of a coaxial metamaterial in the mid-IR.
- Daehan Yoo
- , Ferran Vidal-Codina
- & Sang-Hyun Oh
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Article
| Open AccessDynamic beam steering with all-dielectric electro-optic III–V multiple-quantum-well metasurfaces
Here, the authors demonstrate an electrically tunable metasurface with III–V semiconducting MQW structures as resonant metasurface elements. The amplitude and phase of the light reflected from the metasurface can be continuously tuned by applying DC electric field across the MQW metasurface elements.
- Pin Chieh Wu
- , Ragip A. Pala
- & Harry A. Atwater
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Article
| Open AccessNon-obstructive intracellular nanolasers
While the sharp emission lines of microlasers are advantageous for cell tagging, their relatively large size can impede cell migration and behavior. Here, Fikouras et al. develop nano-sized lasers that can readily tag and track various types of cells, including through narrow constrictions.
- Alasdair H. Fikouras
- , Marcel Schubert
- & Malte C. Gather
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Article
| Open AccessRoom-temperature polarized spin-photon interface based on a semiconductor nanodisk-in-nanopillar structure driven by few defects
Room-temperature spin-generation in 1D systems like semiconductor nanopillars is typically inefficient. Here, the authors demonstrate an approach to achieve efficient spin polarization, even in the absence of a magnetic field, by selectively enhancing the radiative efficiency of one spin direction.
- Shula Chen
- , Yuqing Huang
- & Weimin M. Chen
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Article
| Open AccessUltrathin and multicolour optical cavities with embedded metasurfaces
Achieving miniature and versatile nanophotonic devices with metasurfaces is of great interest. The authors embed a metasurface inside an optical cavity to reduce thickness and provide degrees of freedom for controlling resonant wavelengths, enabling multi-band filtering, structural colouration and spectral imaging.
- Amr M. Shaltout
- , Jongbum Kim
- & Alexander V. Kildishev
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Article
| Open AccessResolution of superluminal signalling in non-perturbative cavity quantum electrodynamics
Quantum Rabi model is a standard tool for describing cavity quantum electrodynamics, but the potential shortcomings of its single-mode version are usually neglected. Here, the authors show that, in the ultrastrong coupling regime, a multimode Rabi model is mandatory in order to avoid unphysical results.
- Carlos Sánchez Muñoz
- , Franco Nori
- & Simone De Liberato
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| Open AccessSelective far-field addressing of coupled quantum dots in a plasmonic nanocavity
Plasmonic nanostructures can tailor excitation and emission for quantum emitters, but generally only for a single emitter. In this work, the authors selectively excite and detect one out of two quantum dots coupled to a deep-subwavelength cavity composed of three gold nanorods assembled into a U-shape.
- Jianwei Tang
- , Juan Xia
- & Sailing He
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Article
| Open AccessReshaping the phonon energy landscape of nanocrystals inside a terahertz plasmonic nanocavity
Here the authors show that the dipole-active phonon resonance of semiconducting nanocrystals can be hybridized by a strongly concentrated terahertz vacuum field of a plasmonic nanocavity, thus achieving strong plasmon–phonon coupling even in the absence of direct terahertz illumination.
- Xin Jin
- , Andrea Cerea
- & Luca Razzari
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| Open AccessA quantum optical study of thresholdless lasing features in high-β nitride nanobeam cavities
Here the authors present temperature dependent studies of GaN nanobeam lasers grown on a silicon substrate and demonstrate high-βlasing at room temperature. Comprehensive optical and quantum-optical characterization, complemented by microscopic modeling, of the nanolasers allow identification of lasing behavior.
- Stefan T. Jagsch
- , Noelia Vico Triviño
- & Stephan Reitzenstein
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| Open AccessBiosensing with the singular phase of an ultrathin metal-dielectric nanophotonic cavity
Optical sensors generally rely on abrupt phase changes to detect the presence of an analyte, but oftentimes they require complex nanostructures. Here, Sreekanth et al. use a simple asymmetric thin-film multilayer stack to demonstrate a point of darkness and phase singularity to develop a sensitive biosensor.
- Kandammathe Valiyaveedu Sreekanth
- , Sivaramapanicker Sreejith
- & Ranjan Singh