Absorptance - Explore the Science & Experts | ideXlab



Scan Science and Technology

Contact Leading Edge Experts & Companies

Absorptance

The Experts below are selected from a list of 13878 Experts worldwide ranked by ideXlab platform

Absorptance – Free Register to Access Experts & Abstracts

Mária Csete – One of the best experts on this subject based on the ideXlab platform.

  • optimization of plasmonic structure integrated single photon detector designs to enhance Absorptance
    Novel Optical Materials and Applications, 2015
    Co-Authors: Mária Csete, Gabor Szekeres, Balazs Banhelyi, Andras Szenes, Tibor Csendes, Gabor Szabo

    Abstract:

    Plasmonic structure integrated SNSPD configurations were optimized for 1550 nm p-polarized light illumination to maximize Absorptance. Orientation dependent NbN Absorptance, spectral sensitivity and dispersion characteristics were investigated.

    Free Register to Access Article

  • Improvement of infrared single-photon detectors Absorptance by integrated plasmonic structures.
    Scientific Reports, 2013
    Co-Authors: Mária Csete, Áron Sipos, Faraz Najafi, Gabor Szabo, Anikó Szalai, Karl K Berggren

    Abstract:

    Plasmonic structures open novel avenues in photodetector development. Optimized illumination configurations are reported to improve p-polarized light Absorptance in superconducting-nanowire single-photon detectors (SNSPDs) comprising short- and long-periodic niobium-nitride (NbN) stripe-patterns. In OC-SNSPDs consisting of ~quarter-wavelength dielectric layer closed by a gold reflector the highest Absorptance is attainable at perpendicular incidence onto NbN patterns in P-orientation due to E-field concentration at the bottom of nano-cavities. In NCAI-SNSPDs integrated with nano-cavity-arrays consisting of vertical and horizontal gold segments off-axis illumination in S-orientation results in polar-angle-independent perfect Absorptance via collective resonances in short-periodic design, while in long-periodic NCAI-SNSPDs grating-coupled surface waves promote EM-field transportation to the NbN stripes and result in local Absorptance maxima. In NCDAI-SNSPDs integrated with nano-cavity-deflector-array consisting of longer vertical gold segments large Absorptance maxima appear in 3p-periodic designs due to E-field enhancement via grating-coupled surface waves synchronized with the NbN stripes in S-orientation, which enable to compensate fill-factor-related retrogression.

    Free Register to Access Article

  • Optimized polar-azimuthal orientations for polarized light illumination of different superconducting nanowire single-photon detector designs
    Journal of Nanophotonics, 2012
    Co-Authors: Mária Csete, Áron Sipos, Faraz Najafi, Karl K Berggren

    Abstract:

    The optimum orientations were determined for polarized light illumination of three superconducting nanowire single-photon detector (SNSPD) designs consisting of niobium-nitride (NbN) stripes with dimensions according to conventional devices in 200 nm periodic pattern: (1) standing in air (bare-SNSPD), (2) below ∼ quarter-wavelength hydrogen-silsesquioxane (HSQ) filled nano-cavity (DC-SNSPD), and (3) below HSQ-filled nano-cavity closed by a thin gold reflector (OC-SNSPD). Computations showed that the optical response and near-field distribution vary significantly with polar angle φ , and these variations are analogous across all azimuthal angles γ , but are fundamentally different in different device designs. Larger Absorptance is attainable due to p -polarized illumination of NbN patterns in P -orientation, while s -polarized illumination results in higher Absorptance in S -orientation. As a result of p-polarized illumination, a global NbN Absorptance maximum appears in bare-SNSPD at polar angle corresponding to attenuated total internal reflection (ATIR); in DC-SNSPD exactly at total internal reflection (TIR); and at perpendicular incidence in OC-SNSPD. S -polarized illumination results in a global NbN Absorptance maximum in bare-SNSPD at TIR; in DC-SNSPD at polar angle corresponding to ATIR phenomenon; while large and almost polar angle independent Absorptance is attainable in OC-SNSPD at small tilting.

    Free Register to Access Article

Karl K Berggren – One of the best experts on this subject based on the ideXlab platform.

  • Improvement of infrared single-photon detectors Absorptance by integrated plasmonic structures.
    Scientific Reports, 2013
    Co-Authors: Mária Csete, Áron Sipos, Faraz Najafi, Gabor Szabo, Anikó Szalai, Karl K Berggren

    Abstract:

    Plasmonic structures open novel avenues in photodetector development. Optimized illumination configurations are reported to improve p-polarized light Absorptance in superconducting-nanowire single-photon detectors (SNSPDs) comprising short- and long-periodic niobium-nitride (NbN) stripe-patterns. In OC-SNSPDs consisting of ~quarter-wavelength dielectric layer closed by a gold reflector the highest Absorptance is attainable at perpendicular incidence onto NbN patterns in P-orientation due to E-field concentration at the bottom of nano-cavities. In NCAI-SNSPDs integrated with nano-cavity-arrays consisting of vertical and horizontal gold segments off-axis illumination in S-orientation results in polar-angle-independent perfect Absorptance via collective resonances in short-periodic design, while in long-periodic NCAI-SNSPDs grating-coupled surface waves promote EM-field transportation to the NbN stripes and result in local Absorptance maxima. In NCDAI-SNSPDs integrated with nano-cavity-deflector-array consisting of longer vertical gold segments large Absorptance maxima appear in 3p-periodic designs due to E-field enhancement via grating-coupled surface waves synchronized with the NbN stripes in S-orientation, which enable to compensate fill-factor-related retrogression.

    Free Register to Access Article

  • Optimized polar-azimuthal orientations for polarized light illumination of different superconducting nanowire single-photon detector designs
    Journal of Nanophotonics, 2012
    Co-Authors: Mária Csete, Áron Sipos, Faraz Najafi, Karl K Berggren

    Abstract:

    The optimum orientations were determined for polarized light illumination of three superconducting nanowire single-photon detector (SNSPD) designs consisting of niobium-nitride (NbN) stripes with dimensions according to conventional devices in 200 nm periodic pattern: (1) standing in air (bare-SNSPD), (2) below ∼ quarter-wavelength hydrogen-silsesquioxane (HSQ) filled nano-cavity (DC-SNSPD), and (3) below HSQ-filled nano-cavity closed by a thin gold reflector (OC-SNSPD). Computations showed that the optical response and near-field distribution vary significantly with polar angle φ , and these variations are analogous across all azimuthal angles γ , but are fundamentally different in different device designs. Larger Absorptance is attainable due to p -polarized illumination of NbN patterns in P -orientation, while s -polarized illumination results in higher Absorptance in S -orientation. As a result of p-polarized illumination, a global NbN Absorptance maximum appears in bare-SNSPD at polar angle corresponding to attenuated total internal reflection (ATIR); in DC-SNSPD exactly at total internal reflection (TIR); and at perpendicular incidence in OC-SNSPD. S -polarized illumination results in a global NbN Absorptance maximum in bare-SNSPD at TIR; in DC-SNSPD at polar angle corresponding to ATIR phenomenon; while large and almost polar angle independent Absorptance is attainable in OC-SNSPD at small tilting.

    Free Register to Access Article

  • Improvement of infrared single-photon detectors Absorptance by integrated plasmonic structures
    arXiv: Optics, 2012
    Co-Authors: Mária Csete, Áron Sipos, Faraz Najafi, Anikó Szalai, Karl K Berggren

    Abstract:

    The Absorptance of p-polarized light in superconducting-nanowire single-photon detectors (SNSPDs) was improved by integrating (1) ~quarter-wavelength nano-optical cavity closed by a gold reflector (OC-SNSPD), (2) nano-cavity-array closed by vertical and horizontal gold segments (NCAI-SNSPD), and (3) nano-cavity-deflector-array consisting of longer vertical gold segments (NCDAI-SNSPD) into short- (p-) and long- (3p-) periodic niobium-nitride (NbN) stripe-patterns. In OC-SNSPDs the highest Absorptance is observable at perpendicular incidence onto NbN stripes in P-orientation due to E-field concentration at the bottom of nano- cavities. In short-periodic NCAI-SNSPDs off-axis illumination results in almost polar-angle-independent perfect Absorptance due to collective resonances on plasmonic MIM nano-cavity-arrays in S-orientation. In long-periodic NCAI-SNSPDs the surface wave-excitation phenomena promote EM-field transportation to the NbN stripes in S-orientation and results in local Absorptance maxima. In NCDAI-SNSPDs with proper periodicity large Absorptance maxima appear due to synchronous E-field enhancement via deflected SPPs below NbN stripes in S-orientation, which make possible fill-factor-related loss compensation.

    Free Register to Access Article

Áron Sipos – One of the best experts on this subject based on the ideXlab platform.

  • Improvement of infrared single-photon detectors Absorptance by integrated plasmonic structures.
    Scientific Reports, 2013
    Co-Authors: Mária Csete, Áron Sipos, Faraz Najafi, Gabor Szabo, Anikó Szalai, Karl K Berggren

    Abstract:

    Plasmonic structures open novel avenues in photodetector development. Optimized illumination configurations are reported to improve p-polarized light Absorptance in superconducting-nanowire single-photon detectors (SNSPDs) comprising short- and long-periodic niobium-nitride (NbN) stripe-patterns. In OC-SNSPDs consisting of ~quarter-wavelength dielectric layer closed by a gold reflector the highest Absorptance is attainable at perpendicular incidence onto NbN patterns in P-orientation due to E-field concentration at the bottom of nano-cavities. In NCAI-SNSPDs integrated with nano-cavity-arrays consisting of vertical and horizontal gold segments off-axis illumination in S-orientation results in polar-angle-independent perfect Absorptance via collective resonances in short-periodic design, while in long-periodic NCAI-SNSPDs grating-coupled surface waves promote EM-field transportation to the NbN stripes and result in local Absorptance maxima. In NCDAI-SNSPDs integrated with nano-cavity-deflector-array consisting of longer vertical gold segments large Absorptance maxima appear in 3p-periodic designs due to E-field enhancement via grating-coupled surface waves synchronized with the NbN stripes in S-orientation, which enable to compensate fill-factor-related retrogression.

    Free Register to Access Article

  • Optimized polar-azimuthal orientations for polarized light illumination of different superconducting nanowire single-photon detector designs
    Journal of Nanophotonics, 2012
    Co-Authors: Mária Csete, Áron Sipos, Faraz Najafi, Karl K Berggren

    Abstract:

    The optimum orientations were determined for polarized light illumination of three superconducting nanowire single-photon detector (SNSPD) designs consisting of niobium-nitride (NbN) stripes with dimensions according to conventional devices in 200 nm periodic pattern: (1) standing in air (bare-SNSPD), (2) below ∼ quarter-wavelength hydrogen-silsesquioxane (HSQ) filled nano-cavity (DC-SNSPD), and (3) below HSQ-filled nano-cavity closed by a thin gold reflector (OC-SNSPD). Computations showed that the optical response and near-field distribution vary significantly with polar angle φ , and these variations are analogous across all azimuthal angles γ , but are fundamentally different in different device designs. Larger Absorptance is attainable due to p -polarized illumination of NbN patterns in P -orientation, while s -polarized illumination results in higher Absorptance in S -orientation. As a result of p-polarized illumination, a global NbN Absorptance maximum appears in bare-SNSPD at polar angle corresponding to attenuated total internal reflection (ATIR); in DC-SNSPD exactly at total internal reflection (TIR); and at perpendicular incidence in OC-SNSPD. S -polarized illumination results in a global NbN Absorptance maximum in bare-SNSPD at TIR; in DC-SNSPD at polar angle corresponding to ATIR phenomenon; while large and almost polar angle independent Absorptance is attainable in OC-SNSPD at small tilting.

    Free Register to Access Article

  • Improvement of infrared single-photon detectors Absorptance by integrated plasmonic structures
    arXiv: Optics, 2012
    Co-Authors: Mária Csete, Áron Sipos, Faraz Najafi, Anikó Szalai, Karl K Berggren

    Abstract:

    The Absorptance of p-polarized light in superconducting-nanowire single-photon detectors (SNSPDs) was improved by integrating (1) ~quarter-wavelength nano-optical cavity closed by a gold reflector (OC-SNSPD), (2) nano-cavity-array closed by vertical and horizontal gold segments (NCAI-SNSPD), and (3) nano-cavity-deflector-array consisting of longer vertical gold segments (NCDAI-SNSPD) into short- (p-) and long- (3p-) periodic niobium-nitride (NbN) stripe-patterns. In OC-SNSPDs the highest Absorptance is observable at perpendicular incidence onto NbN stripes in P-orientation due to E-field concentration at the bottom of nano- cavities. In short-periodic NCAI-SNSPDs off-axis illumination results in almost polar-angle-independent perfect Absorptance due to collective resonances on plasmonic MIM nano-cavity-arrays in S-orientation. In long-periodic NCAI-SNSPDs the surface wave-excitation phenomena promote EM-field transportation to the NbN stripes in S-orientation and results in local Absorptance maxima. In NCDAI-SNSPDs with proper periodicity large Absorptance maxima appear due to synchronous E-field enhancement via deflected SPPs below NbN stripes in S-orientation, which make possible fill-factor-related loss compensation.

    Free Register to Access Article