Layered materials can be assembled vertically to fabricate a new class of van der Waals (VDW) heterostructures few atomic layers thick, compatible with wide range substrates and optoelectronic device geometries, enabling strategies for control light-matter coupling. Here, we incorporate molybdenum diselenide/boron nitride (MoSe$_2$/hBN) quantum wells (QWs) in tunable optical microcavity. Part-light-part-matter polariton eigenstates are observed as result the strong coupling between MoSe$_2$...

Abstract Two-dimensional transition metal dichalcogenides exhibit strong optical transitions with significant potential for optoelectronic devices. In particular they are suited cavity quantum electrodynamics in which coupling leads to polariton formation as a root realisation of inversionless lasing, condensation and superfluidity. Demonstrations such strongly correlated phenomena date have often relied on cryogenic temperatures, high excitation densities were frequently impaired by...

Integration of quasi-two-dimensional (2D) films metal–chalcogenides in optical microcavities permits new photonic applications these materials. Here we present tunable with monolayer MoS2 or few GaSe films. We observe significant modification spectral and temporal properties photoluminescence (PL): PL is emitted spectrally narrow wavelength-tunable cavity modes quality factors up to 7400; a 10-fold lifetime shortening achieved, consequence Purcell enhancement the spontaneous emission rate.

Two-dimensional transition metal dichalcogenide (TMD) semiconductors provide a unique possibility to access the electronic valley degree of freedom using polarized light, opening way information transfer between distant systems. Excitons with well-defined index (or pseudospin) as well superpositions exciton states can be created light having circular and linear polarization, respectively. However, generated excitons have short lifetimes (ps) are also subject electron-hole exchange...

We report an extended family of spin textures zero-dimensional exciton-polaritons spatially confined in tunable open microcavity structures. The transverse-electric--transverse-magnetic (TE-TM) splitting, which is enhanced the cavity structures, leads to polariton eigenstates carrying quantized vortices. Depending on strength and anisotropy confining potential TE-TM induced can be tuned via excitonic or photonic fractions, exciton-polariton emissions exhibit either spin-vortex-like patterns...

We demonstrate the tunable enhancement of zero phonon line a single nitrogen-vacancy color center in diamond at cryogenic temperature. An open cavity fabricated using focused ion beam milling provides mode volumes as small 1.24 $\mu$m$^3$. In-situ tuning resonance is achieved with piezoelectric actuators. At optimal coupling full signal from individual transitions enhanced by about factor 10 and overall emission rate NV$^-$ increased 40% compared that measured same absence field confinement....

Single ZnO microwires are investigated by angle-resolved photoluminescence spectroscopy. We show that confined optical modes similar to whispering gallery can strongly interact with excitons form one-dimensional exciton polaritons at room temperature, normal mode splitting exceeding 200 meV. With such a splitting, which is much larger than LO phonon energy, strong quenching of the polariton-phonon interaction achieved, even temperature and for large excitonic fractions. Thus, record figure...

Open-access optical microcavities are emerging as an original tool for light-matter studies thanks to their intrinsic tunability and the direct access maximum of electric field along with small mode volume. In this article, we present recent developments in fabrication such devices demonstrating topographic control micromirrors at nanometer scale well a high degree reproducibility. Our method takes into account template shape effect dielectric mirror growth. addition, characterization these...

We present a method to implement 3-dimensional polariton confinement with in-situ spectral tuning of the cavity mode. Our tunable microcavity is hybrid system consisting bottom semiconductor distributed Bragg reflector (DBR) containing quantum wells (QWs) grown on top and dielectric concave DBR separated by micrometer sized gap. Nanopositioners allow independent positioning two mirrors mode energy can be tuned controlling distance between them. When close resonance, we observe characteristic...

Characterization and trapping of nanoparticles in solution is great importance for lab-on-a-chip applications biomedical, environmental, materials sciences. Devices are now starting to emerge allowing such manipulations investigations real-time. Better insights into the interaction between nanoparticle optical trap therefore necessary order move forward this field. In work, we present a new kind nanotweezers based on open microcavities. We show that by monitoring cavity mode wavelength shift...

We investigate, experimentally and theoretically, the dynamics of a laser-driven cavity with noninstantaneous effective photon-photon interactions. Scanning laser-cavity frequency detuning at different speeds across an optical bistability, we find hysteresis area that is nonmonotonic function speed. In limit fast scans comparable to memory time interactions, demonstrate decays following universal power law scaling exponent -1. further regime non-Markovian emerging from white noise. This...

Open-access optical microcavities provide a novel approach to label-free lab-on-a-chip optofluidic sensing. They offer direct access highly confined electromagnetic field, and yield femtoliter detection volume. This article describes the characteristics of these devices for refractive index We show that most ambient noise can be removed from data by simultaneous tracking resonances across an array cavities. A sensitivity 3.5 × 10(-4) RIU is demonstrated which corresponds detecting change...

We report progress in the development of tunable room temperature triggered single photon sources based on nitrogen-vacancy (NV) centres nanodiamond coupled to open access optical micro-cavities. The feeding fluorescence from an NV centre into cavity mode increases spectral density emission and results output stream photons with line width order 1 nm, range 640 - 700 nm. record purities exceeding 96% estimated device efficiencies up 3%. compare performance using plano-concave microcavities...

Large bandgap semiconductor microwires constitute a very advantageous alternative to planar microcavities in the context of room temperature strong coupling regime between exciton and light. In this work we demonstrate that GaN microwire, is achieved up with large Rabi splitting 125 meV never before Nitride-based photonic nanostructure. The demonstration relies on method which doesn't require any knowledge \'a priori eigenmodes energy i.e. details microwire cross-section shape. Moreover,...

The ionization quenching factor (IQF) is defined as the fraction of energy released by a recoil in medium through compared with its total kinetic energy. At low energies, range few keV, produced falls rapidly and systematic measurements are needed. We report carried out at such energies function pressure He4 350, 700, 1000 1300 mbar. In order to produce nucleus moving controlled detection volume, we have developed an Electron Cyclotron Resonance Ion Source (ECRIS) coupled chamber...

We report on the measurement of first-order spatial correlations a one-dimensional $97%$ excitonic polariton condensate, excited in cooled ZnO microwires by nonresonant optical pulses. find that, thanks to tiny $3%$ photonic fraction, coherence length as large 10 $\ensuremath{\mu}$m can build up, i.e., orders magnitude larger than any reported so far for an ultracold exciton gas. Based driven-dissipative mean-field model we show that decay is mainly due shallow disorder and conditions.

Open microcavities represent a versatile cavity design that allows the external control of internal properties such as thickness and mode detuning without changing key parameters itself, rendering them particularly interesting for light–matter interaction experiments. Here, we demonstrate tunability an open microcavity with embedded active organic layer providing parallel alignment molecular transition dipole moments well strong self-absorption inside cavity. By decreasing thickness, observe...

We experimentally demonstrate tunable coupled cavities based upon open access zero-dimensional hemispherical microcavities. The modes of the photonic molecules are strongly with quantum well excitons forming a system polaritonic molecules. cavity-cavity coupling strength, which is determined by degree modal overlap, controlled through fabricated centre-to-centre distance and tuned in-situ manipulation both exciton-photon detunings using nanopositioners to vary mirror separation angle between...

The recent development of open-access optical microcavities opens up a number intriguing possibilities in the realm chemical sensing. We provide an overview different possible sensing modalities, with examples refractive index sensing, absorption measurements, and tracking trapping nanoparticles. extremely small mode volumes within microcavity allow very numbers molecules to be probed: our current best detection limits for are around 105 102 molecules, respectively, scope further improvements future.

In this work, we use focused ion beam (FIB) milling to generate custom mirror shapes for quantum simulation in optical microcavities. the paraxial limit, light multimode microcavities follows an equation of motion which is equivalent Schrödinger’s equation, with surface topography mirrors playing role potential energy landscape. FIB allows us engineer a wide variety trapping potentials microcavity light, through exquisite control over topography, including 2D box, 1D waveguide, and Mexican...

Open-access optical microcavities act as a combined trap and sensor. This work shows that the integration of into microfluidics with controlled flow speed can open up new avenues for nanoparticle characterization.

Atomically flat semiconducting materials such as monolayer WSe$_2$ hold great promise for novel optoelectronic devices. Recently, quantum light emission has been observed from bound excitons in exfoliated WSe$_2$. As part of developing devices, the control radiative properties emitters is an important step. Here we report coupling a exciton to open microcavities. We use range radii curvature plano-concave cavity geometry with mode volumes $\lambda^3$ regime, giving Purcell factors up 8 while...

Open‐access microcavities are emerging as a new approach to confine and engineer light at mode volumes down the λ 3 regime. They offer direct access highly confined electromagnetic field while maintaining tunability of system flexibility for coupling range matter systems. This article presents study coupled cavities, which substrates produced using Focused Ion Beam milling. Based on experimental theoretical investigation engineering between two with radius curvature 6 m is demonstrated....