Bessel beams are non-diffracting light structures, which maintain their spatial features after meters of propagation and realized with simple optical elements such as axicon lenses, filters, lasers. In this paper, we demonstrate a method for generating non diffractive Bessel-like through heavily scattering system, exploiting wavefronts shaped by modulator. With the proposed starting from amorphous speckle patterns, it is possible to produce at user defined positions configurable...

Optical imaging techniques are widely used in biological research, but their penetration depth is limited by tissue scattering. Wavefront shaping able to overcome this problem principle, often slow, and performance depends on the sample. This greatly reduces practicability for applications. Here we present a scattering compensation technique based three-photon excitation, which converges faster than comparable two-photon (2P) works reliably even densely labeled samples, where 2P approaches...

Strong scattering in the optical paths can be proactively exploited for determining light propagation and focusing through turbid media ultimately improve imaging manipulation capabilities. The use of shapers together with strongly structures enables production foci confined nanoscale or on other hand may provide significantly enhanced fields view. Exploiting this concept, we introduce ad hoc engineered structures, by direct femtosecond laser writing bulk glasses, presenting isotropy one...

Abstract Adaptive optics can focus light through opaque media by compensating the random phase delay acquired while crossing a scattering curtain. The technique is commonly exploited in many fields, including astrophysics, microscopy, biomedicine and biology. A turbid lens has capability of producing foci with resolution higher than conventional optics, however it fundamental limit: to obtain sharp one introduce strongly medium optical path. Indeed tight focusing needs strong and, as...

Optical tomographic imaging of biological specimen bases its reliability on the combination both accurate experimental measures and advanced computational techniques. In general, due to high scattering absorption in most tissues, multi view geometries are required reduce diffuse halo blurring reconstructions. Scanning processes used acquire data but they inevitably introduces perturbation, negating assumption aligned measures. Here we propose an innovative, registration free, protocol...

Fluorescence tomography is a well-established methodology able to provide structural and functional information on the measured object. At optical wavelengths, unpredictable scattering of light often considered problem overcome, rather than feature exploit. Advances in disordered photonics have shed new possibilities offered by opaque materials, treating them as autocorrelation lenses create images focus light. In this Letter, we propose through disorder, introducing modified Fourier-slice...

Hyperuniform structures possess the ability to confine and drive light, although their fabrication is extremely challenging. Here we demonstrate that speckle patterns obtained by a superposition of randomly arranged sources Bessel beams can be used generate hyperunifrom scalar fields. By exploiting laser light tailored with spatial filter, experimentally produce (without requiring any computational power) pattern possessing maxima at locations corresponding hyperuniform distribution....

This work presents an optical on-a-chip humidity sensor based on the hydroscopic behavior of infiltrated liquid into sub-micron holes a silicon photonic crystal. Direct measurements refractive index in combination with numerical simulations show that sensitivity device is due to changes both liquid's and volume. We report sensing response time 0.1 ms study stability reversibility sensor. demonstration highlights offered by optofluidics crystal circuits potential for realizing ultra-compact...

Optical tomography in biomedical imaging is a highly dynamic field which non-invasive optical and computational techniques are combined to obtain three dimensional representation of the specimen we interested image. Although at wavelengths scattering main obstacle reach diffraction limited resolution, recently several studies have shown possibility image even objects fully hidden behind turbid layer exploiting information contained speckle autocorrelation via an iterative phase retrieval...

Adaptive optics can focus light through opaque media by compensating the random phase delay acquired while crossing a scattering curtain. The technique is commonly exploited in many fields, including astrophysics, microscopy, biomedicine and biology. A turbid lens has capability of producing foci with resolution higher than conventional optics, however it fundamental limit: to obtain sharp one introduce strongly medium optical path. Indeed tight focusing needs strong and, as consequence,...

Bessel beams are non-diffracting light structures, which can be produced with simple tabletop optical elements such as axicon lenses or ring spatial filters and coherent laser beams. One of their main characteristic is that maintain characteristics after meters propagation. In this paper we demonstrate a system method for generating from amorphous speckle patterns, exploiting adaptive optimization by modulator. These speckles generated modes transmitted through scattering curtain selected...

Recently great progress has been made in biological and biomedical imaging by combining non-invasive optical methods, novel adaptive light manipulation computational techniques for intensity-based phase recovery three dimensional image reconstruction. In particular relation to the work presented here, Optical Projection Tomography (OPT) is a well-established technique mostly transparent absorbing models such as C. Elegans Danio Rerio. On contrary, scattering layers like cocoon surrounding...

Optical imaging techniques are widely used in biological research, but their penetration depth is limited by tissue scattering. Wavefront shaping able to overcome this problem principle, often slow and performance depends on the sample. This greatly reduces practicability for applications. Here we present a scattering compensation technique based three-photon (3P) excitation, which converges faster than comparable two-photon (2P) works reliably even densely labeled samples, where 2P...

By compensating the random phase delay acquired while a light beam crosses scattering curtain, it is possible to address at selected target position beyond obstacle. An opaque lens can produce foci with resolution higher than conventional optics if strongly medium exploited. In practice, subwavelength obtained only for weakly transmitting samples. Herein we present method which allows obtaining tiny bright optical spots even in presence of minimum amount (semi-transparent media) path. Using...

Wavefront shaping has revolutionized the concepts of optical imaging and focusing. Contrary to what was believed, strong scattering in paths can be exploited favor light focusing through turbid media ultimately improve manipulation capabilities. The use shapers appropriately engineered structures, i.e. opaque lenses enables production nano-scale confined foci extended fields view. Exploiting this concept we fabricate configurable structures by direct femtosecond laser writing. properly...

The combined use of a wavefront modulator and scattering medium forms an "opaque lens" which forces the light to focus tightly. adaptive has same shape as correlation function original speckle pattern it can be generated at defined positions with resolution up hundreds nanometers. We have demonstrated that manipulating spatial components structure focus. Exploiting selectively spatial-frequencies from we realized opaque lenses able produce sub-correlation foci Bessel beams.

By compensating the random phase delay acquired while a light beam crosses scattering curtain, it is possible to address at selected target position beyond obstacle. An opaque lens can produce foci with resolution higher than conventional optics if strongly medium exploited. In practice, subwavelength obtained only for weakly transmitting samples. Herein we present method which allows obtaining tiny bright optical spots even in presence of minimum amount (semi-transparent media) path. Using...

Microscopy and optical imaging are drastically limited by the inhomogeneities encountered light while propagating from object of interest to detection system. In this context, adaptive optics wavefront manipulation able improve contrast (visibility) systems embedded in turbid noisy environments. By shaping, fluence through complex can be controlled, thus, confining a defined microscopic region volume or at back scattering structures. We imagine counterintuitively exploit barriers, turning...

We discuss the problem of tomographic reconstruction fluorescent objects hidden behind random media. To accomplish this, we focus on properties autocorrelation, relying phase retrieval algorithms to perform 3D reconstruction.