The manipulation and characterization of light polarization states are essential for many applications in quantum communication computing, spectroscopy, bioinspired navigation, imaging. Chiral metamaterials metasurfaces facilitate ultracompact devices circularly polarized generation, manipulation, detection. Herein, we report chiral with both strong optical effects low insertion loss. We experimentally demonstrated submicron-thick filters peak extinction ratios up to 35 maximum transmission...

Abstract Polarimetric imaging has a wide range of applications for uncovering features invisible to human eyes and conventional sensors. Chip-integrated, fast, cost-effective, accurate full-Stokes polarimetric sensors are highly desirable in many applications, which, however, remain elusive due fundamental material limitations. Here we present chip-integrated Meta surface-based Full-Stokes Polar imetric Im aging sensor (MetaPolarIm) realized by integrating an ultrathin (~600 nm) metasurface...

Abstract Graphene is an attractive material for all-optical modulation because of its ultrafast optical response and broad spectral coverage. However, graphene modulators reported so far require high pump fluence due to the ultrashort photo-carrier lifetime limited absorption in graphene. We present modulator designs based on graphene-metal hybrid plasmonic metasurfaces with highly enhanced light-graphene interaction nanoscale hot spots at probe (signal) wavelengths. Based this design...

Flat optics presents a new path to control the phase, amplitude, and polarization state of light with ultracompact devices. Here we demonstrate chip-integrated metasurface devices for detection mid-infrared arbitrary states. Six high-performance microscale linear circular filters based on vertically stacked plasmonic metasurfaces (with total thickness <600  nm) are integrated same chip obtain all four Stokes parameters high accuracy. The device designs can be tailored operate at any...

Exploring emerging materials with enhanced optical nonlinearities at low power levels ultrafast response and small footprints is of great interest for information processing, communication, sensing, quantum systems. Recent progress on nonlinear metamaterials metasurfaces suggests promising solutions to overcome the limitations in nature. Here we present a design concept highly saturable absorption effect based subwavelength-thick (<1/5λ0) hybrid graphene-plasmonic metasurface structures...

Skin breakdown is a prevalent and costly medical condition worldwide, with the etiologic healing processes being complex multifactorial. Quantitative assessment of wound challenging due to subjective measurement size related characteristics. We propose that in vivo spectral reflectance measurements can serve as valuable clinical monitoring tool/device study healing. have designed multi camera able acquire 18 wavelength sensitive images single snapshot. A lenslets array front digital combined...

We show the emergence of light localization in arrays coupled optical waveguides with randomness only imaginary part their permittivity and develop a one-parameter scaling theory for normalized participation number Floquet-Bloch modes. This introduces new length scale decay autocorrelation function paraxial beam propagation. Our results are relevant to vast family systems dissipative impedance spatial profile.

We propose, design, and experimentally test a non-Hermitian acoustic superlattice that acts as tunable precise filter. The is composed of two concatenated sublattices. first sublattice Hermitian, while the other can be adjusted to Hermitian or non-Hermitian. existence non-Hermiticity, in terms an induced loss second sublattice, results generation absorption resonances appear reflected spectrum. This provides us with powerful knob absorb reflect several frequencies at will high accuracy....

We introduce a class of metamaterials with uniformly balanced gain and loss associated complex permittivity permeability constants. The refractive index such pseudopassive metamaterial is real. An unbounded uniform medium has transport characteristics similar to those its truly passive lossless counterpart the same real index. However, bounded samples show some unexpected scattering features which can be further emphasized by including elements in photonic structure.

Abstract Poor strength, infection, leakage, long procedure times, and inflammation limit the efficacy of common tissue sealing devices in surgeries trauma. Light‐activated is attractive for repair, can be facilitated by generation local heat following absorption nonionizing laser energy chromophores. Here, inherent ability biomaterials exploited to absorb nonionizing, mid‐infrared (midIR) light order engender rapid photothermal repair soft wounds. In this approach, biomaterial simultaneously...

We demonstrate that a family of metamaterials, with designed complex permittivity and permeability such their index refraction is real, have anomalous scattering features as opposed to lossless passive counterparts the same refraction.

Familial Adenomatous Polyposis (FAP) is an autosomal dominant disease characterized by the development of multiple colonic polyps at younger age with a near 100% lifetime risk colorectal cancer. The determination FAP made after extensive clinical evaluation and genetic testing individuals. We investigated novel spectro-polarimetric imaging system capable capturing high-resolution images oral mucosa different wavelengths in attempt to distinguish patients from controls. Results trial show...

We introduce a class of critical states which are embedded in the continuum (CSC) one-dimensional optical waveguide array with one non-Hermitian defect. These at verge being fractal and have real propagation constant. They emerge phase transition is driven by imaginary refractive index defect it accompanied mode segregation reveals analogies Dicke super -radiance. Below this point extended while above they evolve to exponentially localized modes. An addition background gain or loss can turn...

We present theoretical modeling and experimental demonstration of MIR polarization detection based on monolithically chip-integrated plasmonic metasurefaces. Our technique enables full Stokes Parameters for arbitrary polarized states light in wavelengths.

We demonstrate saturable absorption and ultrafast recovery of subwavelength (~λ/5) graphene-plasmonic hybrid metasurfaces. Measurements indicate a saturation fluence as low 0.15μJ/cm 2 time &lt;60fs at infrared wavelengths.

Patients with diabetic retinopathy (DR) may experience a reduction in retinal oxygen saturation (SO2). Close monitoring fundus ophthalmoscope can help the prediction of progression disease. In this paper we present noninvasive instrument based on structured illumination aimed at measuring retina optical properties including saturation. The uses two wavelngths one NIR and visible, fast acquisition camera, splitter system that allows for contemporaneous collection images different wavelengths....

We introduce a class of metamaterials with uniformly balanced gain and loss associated complex permittivity permeability constants. The refractive index such pseudo-passive metamaterial is real. An unbounded uniform medium has transport characteristics similar to those its truly passive lossless counterpart the same real index. However, bounded samples show some unexpected scattering features which can be further emphasized by including elements in photonic structure.

Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text M. Koirala, A. G. Yamilov, Basiri, Y. Bromberg, H. Cao, and T. Kottos, "Critical States Embedded in the Continuum," CLEO: 2015, OSA Technical Digest (online) (Optica Publishing Group, 2015), paper FW3C.2. Export BibTex Endnote (RIS) HTML Plain alert Save article