A major challenge in quantum optics and information technology is to enhance the interaction between single photons emitters. Highly engineered optical cavities are generally implemented requiring nanoscale fabrication precision. We demonstrate a fundamentally different approach which disorder used as resource rather than nuisance. generate strongly confined Anderson-localized cavity modes by deliberately adding photonic crystal waveguides. The emission rate of semiconductor dot embedded...

Passive radiative cooling (RC) enables the of objects below ambient temperature during daytime without consuming energy, promising to be a game changer in terms energy savings and CO2 reduction. However, so far most RC surfaces are obtained by energy-intensive nanofabrication processes or make use unsustainable materials. These limitations overcome developing cellulose films with unprecedentedly low absorption solar irradiance strong mid-infrared (mid-IR) emittance. In particular,...

A new photonic material is presented: "photonic glass". This a 3D completely disordered solid arrangement of monodisperse dielectric spheres (see figure). Monodispersity ensures single-sphere optical resonances to be observed. Very thick (from tenths few millimetres) uniform samples can grown by attenuating the inter-sphere interaction. Thin (correlated) films vertical convective deposition and selective etching binary colloidal suspensions.

Self-assembly techniques are widely used to grow ordered structures such as, for example, opal-based photonic crystals. Here, we report on glasses, new disordered materials obtained via a modified self-assembling technique. These random solid thin films which exhibit rich novel light diffusion properties originating from the optical of their building blocks. This material inaugurated wide range nanophotonic with fascinating applications, as resonant lasers or Anderson localization.

Abstract The regulation of temperature is a major energy‐consuming process humankind. Today, around 15% the global‐energy consumption dedicated to refrigeration and this figure predicted triple by 2050, thus linking global warming cooling needs in worrying negative feedback‐loop. Here, an inexpensive solution proposed challenge based on single layer silica microspheres self‐assembled soda‐lime glass. This 2D crystal acts as visibly translucent thermal‐blackbody for above‐ambient radiative...

Abstract Optical nonlinearities, such as thermo-optic mechanisms and free-carrier dispersion, are often considered unwelcome effects in silicon-based resonators and, more specifically, optomechanical cavities, since they affect, for instance, the relative detuning between an optical resonance excitation laser. Here, we exploit these nonlinearities their intercoupling with mechanical degrees of freedom a silicon nanobeam to unveil rich set fundamentally different complex dynamics. By smoothly...

Low-dimensional nanostructured materials can guide light propagating with very low group velocity vg. However, this slow is significantly sensitive to unwanted imperfections in the critical dimensions of nanostructure. The backscattering mean free path, xi, average ballistic propagation length along waveguide, quantifies robustness against type structural disorder. This figure merit determines crossover between acceptable slow-light transmission affected by minimal scattering losses and a...

Confining photons in cavities enhances the interaction between light and matter. In cavity optomechanics, this enables a wealth of phenomena ranging from optomechanically induced transparency to macroscopic objects cooled their motional ground state. Previous work optomechanics employed devices where ubiquitous structural disorder played no role beyond perturbing resonance frequencies quality factors. More generally, interplay disorder, which must be described by statistical physics,...

Nanophononics has the potential for information transfer, in an analogous manner to its photonic and electronic counterparts. The adoption of phononic systems been limited, due difficulties associated with generation, manipulation, detection phonons, especially at GHz frequencies. Existing techniques often require piezoelectric materials external radiofrequency excitation that are not readily integrated into existing CMOS infrastructures, while nonpiezoelectric demonstrations have...

Inverted opals are of great interest as photonic materials. Here, an inexpensive chemical vapor deposition method synthesis ZnO and ZnS inverse (see Figure) is described, based on infiltration calcination in synthetic polystyrene opals. Excellent control the degree infiltration, i.e., layer thickness ZnO, thus properties material, reported.

In this Letter we demonstrate Mie resonances mediated transport of light in randomly arranged, monodisperse dielectric spheres packed at high filling fractions. By means both static and dynamic optical experiments show resonant behavior the key parameters and, particular, find that energy velocity, which is lower than group also displays a behavior.

We present an optical characterization of photonic glasses, composed randomly arranged, monodisperse dielectric spheres packed at high filling fractions. provide a detailed study the resonant behavior diffuse light transport through such systems. By means independent static and dynamic measurements, we show resonances in mean free path, diffusion constant, also energy velocity light. that main parameters can be controlled by varying sphere diameter.

Photonic crystals are extremely sensitive to structural disorder even the point of completely losing their functionalities. While, on one side, this can be detrimental for applications in traditional optical devices, other it gives also rise very interesting new physics and maybe applications. We propose a route introduce photonic controlled way by creating certain percentage vacancies lattice. show how method works what type materials obtained way. Also, we use system probe role resulting...

Fundamental observations in physics ranging from gravitational wave detection to laser cooling of a nanomechanical oscillator into its quantum ground state rely on the interaction between optical and mechanical degrees freedom. A key parameter engineer this is spatial overlap two fields, optimized carefully designed resonators case-by-case basis. Disorder an alternative strategy confine light sound at nanoscale. However, it lacks priori mechanism guaranteeing high degree colocalization due...

Phonons offer the possibility to connect microwave and optical domains while being efficiently transduced with electronic signals. Here, we present a multimodal optomechanical platform, consisting of mechanical-optical-mechanical resonator configuration. The mechanical modes, frequencies at 265 MHz 6.8 GHz, can be simultaneously excited into phonon lasing regime as supported by stability analysis system. Both megahertz gigahertz modes enter self-sustained oscillation regime, leading...

We prove Anderson localization in a disordered photonic crystal waveguide by measuring the ensemble-averaged extinction mean-free path, ${\ensuremath{\ell}}_{\text{e}}$, which is controlled dispersion photon density of states (DOS) waveguide. Except for very low DOS case, where out-of-plane losses are non-negligible, ${\ensuremath{\ell}}_{\text{e}}$ can be approximated to length $\ensuremath{\xi}$. The path shows fivefold variation between low- and high-DOS regime, it becomes shorter than...

Wave propagation in disordered media can be strongly modified by multiple scattering and wave interference. Ultimately, the so-called Anderson-localized regime is reached when waves become confined space. So far, Anderson localization of light has been probed transmission experiments measuring intensity an external source after through a medium. However, discriminating between losses these remains major challenge. In this paper, we present alternative approach where use quantum emitters...

Complex dielectric media often appear opaque because light traveling through them is scattered multiple times. Although the scattering a random process, different paths medium can be correlated encoding information about medium. Here, we present spectroscopic measurements of nonuniversal intensity correlations that emerge when embedding quantum emitters inside disordered photonic crystal found to Anderson-localize light. The probe in situ microscopic details medium, and imprint such...

We study both theoretically and experimentally the effects of introducing deliberate disorder in a slow-light photonic crystal waveguide on photon density states. introduce theoretical model that includes through statistically moving hole centers lattice intrinsic caused by fabrication imperfections. demonstrate disorder-induced mean blueshift an overall broadening states for values ranging 0--12 nm. By comparing with measurements obtained from GaAs waveguide, we find very good agreement...

We have performed measurements of the scattering mean free path $({\ensuremath{\ell}}_{s})$ in photonic crystals with different and controlled amounts disorder. In most perfect crystals, 1 order magnitude chromatic variation ${\ensuremath{\ell}}_{s}$ for just 3% shift around band gap (27 nm wavelength) is obtained. It argued that dispersion governed by both total density states group index incident direction, this last quantity being responsible large ${\ensuremath{\ell}}_{s}$.

Inspired by concepts developed for fermionic systems in the framework of condensed matter physics, topology and topological states are recently being explored also bosonic systems. Recently, some these have been successfully applied to acoustic phonons nanoscale multilayered The reported demonstration confined phononic modes was based on Raman scattering spectroscopy [M. Esmann et al., Phys. Rev. B 97, 155422 (2018)], yet resolution did not suffice determine lifetimes identify other system....