Dr. John J. Hennessy Profile

Dr. John J. Hennessy

at Jet Propulsion Lab

SPIE Involvement:

Author

Publications (39)

Proceedings Article | 5 October 2023 Presentation + Paper

Presentation + Paper

Facilities, testbeds, and procedures for characterizing the SPRITE Far-UV CubeSat

Daniel Szewczyk, Maitland Bowen, Briana Indahl, Dmitry Vorobiev, Abigail Durell, Luis Rodríguez-de Marcos, John Hennessy, Dana Chafetz, Brian Fleming

Proceedings Volume 12678, 1267809 (2023) https://doi.org/10.1117/12.2677112

KEYWORDS: Vacuum chambers, Vacuum, Microchannel plates, Humidity, Aluminum, Optical gratings, Telescopes, Light sources, Laser induced fluorescence, Parabolic mirrors

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Proceedings Article | 5 October 2023 Presentation + Paper

Presentation + Paper

Preliminary optical performance of the SPRITE CubeSat instrument

Maitland Bowen, Brian Fleming, Briana Indahl, Dmitry Vorobiev, Daniel Szewczyk, Kevin France, Luis Rodríguez-de Marcos, Manuel Quijada, John Hennessey

Proceedings Volume 12678, 126780A (2023) https://doi.org/10.1117/12.2677668

KEYWORDS: Space telescopes, Equipment, Optical coatings, Reflectivity, Galactic astronomy, Ultraviolet radiation, Microchannel plates, Telescopes, Far ultraviolet, Optical gratings, Ionizing radiation

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Proceedings Article | 5 October 2023 Presentation + Paper

Presentation + Paper

Status and mission operations of the SPRITE 12U CubeSat: a probe of star formation feedback from stellar to galactic scales with far-UV imaging spectroscopy

Briana Indahl, Brian Fleming, Dmitry Vorobiev, Dana Chafetz, Jack Williams, Maitland Bowen, Diane Brening, Sanchayeeta Borthakur, Javier Del Hoyo, Destry Dewitt, Adriana Diaz, Abigail Durell, Ben Foehr, Kevin France, Sreejith Gopinathan, John Hennessy, Anne Jaskot, Michael Kaiser, Sydney Koehler, Adam Magruder, Adrian Martin, Stephan McCandliss, John O'Meara, Manuel Quijada, Luis Rodríguez-de Marcos, Michael Rotkowski, Ravi Sankrit, Alex Sico, Oswald Siegmund, Daniel Szewczyk, Jason Tumlinson, Stefan Ulrich

Proceedings Volume 12678, 1267806 (2023) https://doi.org/10.1117/12.2677737

KEYWORDS: Astronomical spectroscopy, Equipment, Stars, Galactic astronomy, Microchannel plates, Space operations, Ultraviolet radiation, Calibration, Telescopes, Protective coatings, Mirrors

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Proceedings Article | 4 October 2023 Paper

Paper

Cryolite overcoated aluminum reflectors for far-ultraviolet spectroscopy

Javier Del Hoyo, Luis Rodriguez-de-Marcos, J. Hennessy, M. Batkis, C. Bos, Manuel Quijada

Proceedings Volume 12676, 126760I (2023) https://doi.org/10.1117/12.2678149

KEYWORDS: Aluminum, Reflectivity, Atomic layer deposition, Reflectors, Far ultraviolet, Surface roughness, Spectroscopy, Fluoride, Visible radiation, Reflectance spectroscopy

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Proceedings Article | 27 September 2023 Presentation

Presentation

Ultraviolet CMOS sensors with integrated filter coatings for the UVEX mission

John Hennessy, Robin Rodríguez, April Jewell, Michael Hoenk, Shouleh Nikzad, Brian Grefenstette, Timothee Greffe, Roger Smith, Hannah Earnshaw, Fiona Harrison

Proceedings Volume 12678, 126780K (2023) https://doi.org/10.1117/12.2677968

KEYWORDS: Optical coatings, Ultraviolet radiation, Tunable filters, CMOS sensors, Atomic layer deposition, Far ultraviolet, Optical sensors, Fabrication, Dielectrics, Coating thickness

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Proceedings Article | 27 September 2023 Presentation

Presentation

Advanced detector coatings for UV spectroscopy applications

April Jewell, John Hennessy, Robin Rodríguez, Erika Hamden, Aafaque Khan

Proceedings Volume 12678, 126780L (2023) https://doi.org/10.1117/12.2678037

KEYWORDS: Ultraviolet radiation, Spectroscopy, Optical coatings, Ultraviolet detectors, Spectrometers, Spectral response, Quantum efficiency, Galaxy evolution, Dispersion, Antireflective coatings

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Proceedings Article | 31 August 2022 Presentation + Paper

Presentation + Paper

Optimizing silicon UV detector response with antireflection coatings, solar-blind bandpass filters, and linear variable filters

April Jewell, Ghazaleh Kafaie Shirmanesh, John Hennessy, Shouleh Nikzad

Proceedings Volume 12181, 121810G (2022) https://doi.org/10.1117/12.2630552

KEYWORDS: Sensors, Antireflective coatings, Silicon, Quantum efficiency, Aluminum, Bandpass filters, Ultraviolet radiation, Ultraviolet detectors, Coating, Atomic layer deposition

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Characterization of low light performance of a CMOS sensor for ultraviolet astronomical applications

Timothee Greffe, Roger Smith, Myles Sherman, Fiona Harrison, Hannah Earnshaw, Brian Grefenstette, John Hennessy, Shouleh Nikzad

Proceedings Volume 12191, 121910E (2022) https://doi.org/10.1117/12.2629198

KEYWORDS: Sensors, Cadmium sulfide, Photons, CMOS sensors, Ultraviolet radiation, Video, Charge-coupled devices, Monte Carlo methods, Interference (communication), Astronomy

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

High dynamic range techniques for astronomical applications of CMOS devices

Hannah Earnshaw, Timothee Greffe, Roger Smith, Brian Grefenstette, Fiona Harrison, John Hennessy, Shouleh Nikzad, Charles Shapiro

Proceedings Volume 12191, 121910G (2022) https://doi.org/10.1117/12.2630367

KEYWORDS: Signal to noise ratio, High dynamic range imaging, Sensors, CMOS sensors, Point spread functions, Astronomy, High dynamic range image sensors, CMOS devices, Detection and tracking algorithms, Signal detection

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

2D-doped silicon detectors for UV/optical/NIR and x-ray astronomy

Michael Hoenk, April Jewell, Gillian Kyne, John Hennessy, Todd Jones, Samuel Cheng, Shouleh Nikzad, David Morris, Katherine Lawrie, Jesper Skottfelt

Proceedings Volume 12191, 1219113 (2022) https://doi.org/10.1117/12.2631542

KEYWORDS: Sensors, Charge-coupled devices, Quantum efficiency, Silicon, Interfaces, Ultraviolet radiation, Semiconducting wafers, CMOS sensors, Back illuminated sensors, Data modeling

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Advanced Al/eLiF mirrors for the SPRITE CubeSat

L. Rodríguez-de Marcos, B. Fleming, J. Hennessy, D. Chafetz, J. Del Hoyo, M. Quijada, M. Bowen, D. Vorobiev, B. Indahl

Proceedings Volume 12188, 1218820 (2022) https://doi.org/10.1117/12.2630522

KEYWORDS: Mirrors, Reflectivity, Aluminum, Humidity, Annealing, Optical coatings, Atomic layer deposition, Thin films

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Proceedings Article | 29 August 2022 Poster

Poster

Environmental studies on ALD metal fluorides for future far UV optical coatings

Robin Rodríguez, John Hennessy, April Jewell, Shouleh Nikzad, Parker Hinton, Nicholas Kruczek, Brian Fleming, Kevin France

Proceedings Volume 12181, 121813D (2022) https://doi.org/10.1117/12.2631413

KEYWORDS: Atomic layer deposition, Optical coatings, Metals, Ultraviolet radiation, Mirrors, Magnesium fluoride, Thin film coatings, Reflectivity, Laser induced fluorescence, Thin films

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SPIE Journal Paper | 22 April 2022

Characterization of low light performance of a complementary metal-oxide semiconductor sensor for ultraviolet astronomical applications

Timothee Greffe, Roger Smith, Myles Sherman, Fiona Harrison, Hannah Earnshaw, Brian Grefenstette, John Hennessy, Shouleh Nikzad

JATIS, Vol. 8, Issue 02, 026004, (April 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.2.026004

KEYWORDS: Sensors, Semiconductors, Cadmium sulfide, Ultraviolet radiation, Charge-coupled devices, CMOS sensors, Photons, Video, Astronomy, Switches

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Complementary metal-oxide semiconductor (CMOS) detectors offer many advantages over charge-coupled devices (CCDs) for optical and ultraviolet (UV) astronomical applications, especially in space where high radiation tolerance is required. However, astronomical instruments are most often designed for low light-level observations demanding low dark current and read noise, good linearity, and high dynamic range, characteristics that have not been widely demonstrated for CMOS imagers. We report the performance, over temperatures from 140 to 240 K, of a radiation hardened SRI 4k × 2k back-side illuminated CMOS image sensor with surface treatments that make it highly sensitive in blue and UV bands. After suppressing emission from glow sites resulting from defects in the engineering grade device examined, a 0.077 me − / s dark current floor is reached at 160 K, rising to 1 me − / s at 184 K, rivaling that of the best CCDs. We examine the trade-off between readout speed and read noise, finding that 1.43 e − median read noise is achieved using line-wise digital correlated double sampling at 700 kpix / s / ch corresponding to a 1.5 s readout time. The 15 ke − well capacity in high gain mode extends to 120 ke − in dual gain mode. Continued collection of photogenerated charge during readout enables a further dynamic range extension beyond 106 e − effective well capacity with only 1% loss of exposure efficiency by combining short and long exposures. A quadratic fit to correct for non-linearity reduces gain correction residuals from 1.5% to 0.2% in low gain mode and to 0.4% in high gain mode. Cross-talk to adjacent pixels is only 0.4% vertically, 0.6% horizontally, and 0.1% diagonally. These characteristics plus the relatively large (10 μm) pixel size, quasi 4-side buttability, electronic shutter, and sub-array readout make this sensor an excellent choice for wide field astronomical imaging in space, even at far-UV wavelengths where sky background is very low.

Proceedings Article | 24 August 2021 Poster + Paper

Poster + Paper

New far-ultraviolet reflectivity measurements from ALD-deposited mirror coatings

P. C. Hinton, John Hennessy, Nicholas Kruczek, Brian Fleming, Kevin France

Proceedings Volume 11821, 118211B (2021) https://doi.org/10.1117/12.2593525

KEYWORDS: Reflectivity, Atomic layer deposition, Thin film coatings, Aluminum, Mirrors, Lamps, Optical coatings, Ultraviolet radiation

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Proceedings Article | 24 August 2021 Open Access

Open Access

Poster + Paper

Advances in detector-integrated filter coatings for the far ultraviolet

John Hennessy, April Jewell, Michael Hoenk, Shouleh Nikzad

Proceedings Volume 11821, 118211A (2021) https://doi.org/10.1117/12.2595524

KEYWORDS: Atomic layer deposition, Sensors, Silicon, Quantum efficiency, Reflectivity, Optical coatings, Aluminum, Dielectric filters, Optical filters, Antireflective coatings

Read Abstract +

Proceedings Article | 13 December 2020 Presentation

Presentation

SPARCam: the UV camera for the Star-Planet Activity Research CubeSat (SPARCS)

April Jewell, Christophe Basset, Samuel Cheng, John Hennessy, Gillian Kyne, David Ardila, Todd Jones, Evgenya Shkolnik, Shouleh Nikzad

Proceedings Volume 11444, 114440B (2020) https://doi.org/10.1117/12.2561091

KEYWORDS: Ultraviolet radiation, Cameras, Sensors, Electronics, Stars, Near ultraviolet, James Webb Space Telescope, Ultraviolet detectors, Charge-coupled devices, Antireflective coatings

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Proceedings Article | 13 December 2020 Presentation

Presentation

Delta-doped EMCCDs for sub-orbital and space based missions

Gillian Kyne, Shouleh Nikzad, April Jewell, Samuel Cheng, Todd Jones, John Hennessy, Michael Hoenk

Proceedings Volume 11454, 114541I (2020) https://doi.org/10.1117/12.2561975

KEYWORDS: Electron multiplying charge coupled devices, Space operations, Sensors, Charge-coupled devices, Ultraviolet radiation, Astronomical imaging, Spectrographs, Ultraviolet detectors, Environmental sensing, Aerospace engineering

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Proceedings Article | 16 September 2019 Presentation + Paper

Presentation + Paper

Technology maturity update for the Habitable-zone Exoplanet Imaging Observatory (HabEx) concept

Rhonda Morgan, Keith Warfield, H. Phil Stahl, Bertrand Mennesson, Gary Kuan, Bala Balasubramanian, Dimitri Mawet, Shouleh Nikzad, John Hennessy, Ali Azizi, Stuart Shaklan, Eugene Serabyn

Proceedings Volume 11115, 111150N (2019) https://doi.org/10.1117/12.2529766

KEYWORDS: Exoplanets, Observatories, Telescopes, Coronagraphy, Mirrors, Optical instrument design, Deformable mirrors, Wavefronts, Segmented mirrors, Sensors

Read Abstract +

Proceedings Article | 9 September 2019 Paper

Paper

High-sensitivity far-ultraviolet imaging spectroscopy with the SPRITE Cubesat

Brian Fleming, Kevin France, Jack Williams, Stefan Ulrich, Jason Tumlinson, Stephan McCandliss, John O'Meara, Ravi Sankrit, Sanchayeeta Borthakur, Anne Jaskot, Michael Rutkowski, Manuel Quijada, John Hennessy, Oswald Siegmund

Proceedings Volume 11118, 111180U (2019) https://doi.org/10.1117/12.2529512

KEYWORDS: Sensors, Galactic astronomy, Microchannel plates, Calibration, Stars, Signal to noise ratio, Mirrors, Telescopes, Space operations, Ultraviolet radiation

Read Abstract +

Proceedings Article | 6 July 2018 Presentation + Paper

Presentation + Paper

New far-UV instrumentation enabled by recent advances in mirror coating processes

Emily Witt, Brian Fleming, Kevin France, Manuel Quijada, John Hennessy, Arika Egan, James Wiley

Proceedings Volume 10699, 1069904 (2018) https://doi.org/10.1117/12.2312240

KEYWORDS: Coating, Mirrors, Reflectivity, Reflection, Imaging spectroscopy, Ultraviolet radiation, Laser induced fluorescence, Sensors, Spectrographs, Rockets

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Paper

Ultrathin protective coatings by atomic layer engineering for far ultraviolet aluminum mirrors

John Hennessy, April Jewell, Christopher Moore, Alexander Carver, Kunjithapatham Balasubramanian, Kevin France, Shouleh Nikzad

Proceedings Volume 10699, 1069902 (2018) https://doi.org/10.1117/12.2314185

KEYWORDS: Magnesium fluoride, Aluminum, Mirrors, Reflectivity, Atomic layer deposition, Optical coatings, Etching, Ultraviolet radiation, Thin film coatings, Oxides

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Proceedings Article | 6 July 2018 Paper

Paper

Ultraviolet detectors for astrophysics missions: a case study with the star-planet activity research cubesat (SPARC)

April Jewell, John Hennessy, Todd Jones, Samuel Cheng, Alexander Carver, David Ardila, Evgenya Shkolnik, Michael Hoenk, Shouleh Nikzad

Proceedings Volume 10709, 107090C (2018) https://doi.org/10.1117/12.2312972

KEYWORDS: Sensors, Ultraviolet radiation, Antireflective coatings, Quantum efficiency, Silicon, Ultraviolet detectors, Charge-coupled devices, Bandpass filters, Exoplanets, Ultraviolet coatings

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Proceedings Article | 14 May 2018 Paper

Paper

Advanced imaging capabilities by incorporating plasmonics and metamaterials in detectors

John Hennessy, April Jewell, Michael Hoenk, David Hitlin, Mickel McClish, Alexander Carver, Todd Jones, Ahmed Morsy, Michelle Povinelli, L. Douglas Bell, Shouleh Nikzad

Proceedings Volume 10639, 106391P (2018) https://doi.org/10.1117/12.2305126

KEYWORDS: Silicon, Aluminum, Sensors, Optical filters, Atomic layer deposition, Ultraviolet radiation, Plasmonics, Quantum efficiency, Metamaterials, Metals

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Proceedings Article | 21 September 2017 Paper

Paper

Atomic layer deposition and etching methods for far ultraviolet aluminum mirrors

John Hennessy, Christopher Moore, Kunjithapatham Balasubramanian, April Jewell, Christian Carter, Kevin France, Shouleh Nikzad

Proceedings Volume 10401, 1040119 (2017) https://doi.org/10.1117/12.2274633

KEYWORDS: Aluminum, Atomic layer deposition, Mirrors, Reflectivity, Focus stacking software, Etching, Laser induced fluorescence, Ultraviolet radiation, Oxides, Far ultraviolet

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Proceedings Article | 5 September 2017 Paper

Paper

Mirror coatings for large aperture UV optical infrared telescope optics

Kunjithapatham Balasubramanian, John Hennessy, Nasrat Raouf, Shouleh Nikzad, Javier Del Hoyo, Manuel Quijada

Proceedings Volume 10398, 103980X (2017) https://doi.org/10.1117/12.2274794

KEYWORDS: Space telescopes, Mirrors, Optical coatings, Near infrared, Ultraviolet radiation, Infrared telescopes, Aluminum, Reflectivity, Telescopes, Atomic layer deposition

Read Abstract +

SPIE Journal Paper | 1 September 2017

High-efficiency UV/optical/NIR detectors for large aperture telescopes and UV explorer missions: development of and field observations with delta-doped arrays

Shouleh Nikzad, April Jewell, Michael Hoenk, Todd Jones, John Hennessy, Tim Goodsall, Alexander Carver, Charles Shapiro, Samuel Cheng, Erika Hamden, Gillian Kyne, D. Christopher Martin, David Schiminovich, Paul Scowen, Kevin France, Stephan McCandliss, Roxana Lupu

JATIS, Vol. 3, Issue 03, 036002, (September 2017) https://doi.org/10.1117/12.10.1117/1.JATIS.3.3.036002

KEYWORDS: Sensors, Silicon, Charge-coupled devices, Ultraviolet radiation, Quantum efficiency, Telescopes, Space telescopes, Semiconducting wafers, Ultraviolet telescopes, Astronomical telescopes

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Proceedings Article | 31 August 2017 Presentation + Paper

Presentation + Paper

The development and characterization of advanced broadband mirror coatings for the far-UV

Arika Egan, Brian Fleming, James Wiley, Manuel Quijada, Javier Del Hoyo, John Hennessy, Brian Hicks, Kevin France, Nicholas Kruczek, Nicholas Erickson

Proceedings Volume 10397, 1039715 (2017) https://doi.org/10.1117/12.2274141

KEYWORDS: Optical coatings, Mirrors, Atomic layer deposition, Reflectivity, Imaging spectroscopy, Ultraviolet radiation, Polarization, Physical vapor deposition, Space mirrors, Thin film coatings

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Proceedings Article | 28 April 2017 Paper

Paper

Materials and process development for the fabrication of far ultraviolet device-integrated filters for visible-blind Si sensors

John Hennessy, April Jewell, Michael Hoenk, David Hitlin, Mickel McClish, Alexander Carver, Todd Jones, Shouleh Nikzad

Proceedings Volume 10209, 102090P (2017) https://doi.org/10.1117/12.2262786

KEYWORDS: Silicon, Sensors, Metals, Dielectric filters, Ultraviolet radiation, Quantum efficiency, Visible radiation, Far ultraviolet, Atomic layer deposition, Internal quantum efficiency, Aluminum, Reflectivity, Dielectrics, Avalanche photodetectors, Magnesium fluoride, CCD image sensors, Avalanche photodiodes, Bandpass filters

Read Abstract +

Proceedings Article | 17 October 2016 Paper

Paper

Characterizing environmental effects on visible and UV reflectance of ALD-coated optics

Christian Carter, Christopher Moore, John Hennessy, April Jewell, Shouleh Nikzad, Kevin France

Proceedings Volume 9963, 99630V (2016) https://doi.org/10.1117/12.2238198

KEYWORDS: Reflectivity, Atomic layer deposition, UV optics, Mirrors, Optical coatings, Wafer-level optics, Laser induced fluorescence, Aluminum, Silicon, Magnesium fluoride

Read Abstract +

SPIE Journal Paper | 12 September 2016 Open Access

Open Access

Charge-coupled devices detectors with high quantum efficiency at UV wavelengths

Erika Hamden, April Jewell, Charles Shapiro, Samuel Cheng, Timothy Goodsall, John Hennessy, Michael Hoenk, Todd Jones, Samuel Gordon, Hwei Ru Ong, David Schiminovich, D. Christopher Martin, Shouleh Nikzad

JATIS, Vol. 2, Issue 03, 036003, (September 2016) https://doi.org/10.1117/12.10.1117/1.JATIS.2.3.036003

KEYWORDS: Quantum efficiency, Silicon, Charge-coupled devices, Ultraviolet radiation, Absorption, Sensors, Reflectivity, Aluminum, Silica, Atomic layer deposition

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Proceedings Article | 22 July 2016 Paper

Paper

Atomic Layer Deposited (ALD) coatings for future astronomical telescopes: recent developments

Christopher Samuel Moore, John Hennessy, April Jewell, Shouleh Nikzad, Kevin France

Proceedings Volume 9912, 99122U (2016) https://doi.org/10.1117/12.2232296

KEYWORDS: Atomic layer deposition, Reflectivity, Aluminum, Mirrors, Metals, Astronomy, Ultraviolet radiation, Magnesium fluoride, Oxides, Laser induced fluorescence

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SPIE Journal Paper | 7 June 2016

Performance and prospects of far ultraviolet aluminum mirrors protected by atomic layer deposition

John Hennessy, Kunjithapatham Balasubramanian, Christopher Moore, April Jewell, Shouleh Nikzad, Kevin France, Manuel Quijada

JATIS, Vol. 2, Issue 04, 041206, (June 2016) https://doi.org/10.1117/12.10.1117/1.JATIS.2.4.041206

KEYWORDS: Aluminum, Atomic layer deposition, Reflectivity, Mirrors, Oxides, Optical coatings, Far ultraviolet, Thin films, Laser induced fluorescence, Ultraviolet radiation

Read Abstract +

Proceedings Article | 22 September 2015 Paper

Paper

Coatings for UVOIR telescope mirrors

Kunjithapatham Balasubramanian, John Hennessy, Nasrat Raouf, Shouleh Nikzad, Michael Ayala, Stuart Shaklan, Paul Scowen, Javier Del Hoyo, Manuel Quijada

Proceedings Volume 9602, 96020I (2015) https://doi.org/10.1117/12.2188981

KEYWORDS: Aluminum, Reflectivity, Atomic layer deposition, Mirrors, Diagnostics, Magnesium fluoride, Oxides, Ultraviolet radiation, Laser induced fluorescence, Space telescopes

Read Abstract +

Proceedings Article | 24 August 2015 Paper

Paper

Detector performance for the FIREBall-2 UV experiment

April Jewell, Erika Hamden, Hwei Ru Ong, John Hennessy, Timothy Goodsall, Charles Shapiro, Samuel Cheng, Todd Jones, Alexander Carver, Michael Hoenk, David Schiminovich, Christopher Martin, Shouleh Nikzad

Proceedings Volume 9601, 96010N (2015) https://doi.org/10.1117/12.2190167

KEYWORDS: Sensors, Atomic layer deposition, Ultraviolet radiation, Quantum efficiency, Semiconducting wafers, Electron multiplying charge coupled devices, Silicon, Reflectivity, Silica, Sensor performance

Read Abstract +

Proceedings Article | 24 August 2015 Paper

Paper

Current progress in the characterization of atomic layer deposited AlF3 for future astronomical ultraviolet mirror coatings

Christopher Samuel Moore, John Hennessy, Eliot Kersgaard, April Jewell, Shouleh Nikzad, Kevin France

Proceedings Volume 9601, 96010X (2015) https://doi.org/10.1117/12.2186723

KEYWORDS: Silicon, Reflectivity, Atomic layer deposition, Ultraviolet radiation, Polarization, Optical coatings, Mirrors, Aluminum, Surface roughness, Semiconducting wafers

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Proceedings Article | 30 July 2014 Paper

Paper

Superlattice-doped silicon detectors: progress and prospects

Michael Hoenk, Shouleh Nikzad, Alexander Carver, Todd Jones, John Hennessy, April Jewell, Joseph Sgro, Shraga Tsur, Mickel McClish, Richard Farrell

Proceedings Volume 9154, 915413 (2014) https://doi.org/10.1117/12.2057678

KEYWORDS: Sensors, Doping, Silicon, Interfaces, Superlattices, Quantum efficiency, Deep ultraviolet, Oxides, Atomic layer deposition, Charge-coupled devices

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Proceedings Article | 24 July 2014 Paper

Paper

Recent developments and results of new ultraviolet reflective mirror coatings

Christopher Moore, John Hennessy, April Jewell, Shouleh Nikzad, Kevin France

Proceedings Volume 9144, 91444H (2014) https://doi.org/10.1117/12.2057272

KEYWORDS: Reflectivity, Aluminum, Silicon, Atomic layer deposition, Magnesium fluoride, Ultraviolet radiation, Optical coatings, Thin film coatings, Metals, Mirrors

Read Abstract +

Proceedings Article | 24 July 2014 Paper

Paper

High efficiency CCD detectors at UV wavelengths

Erika Hamden, April Jewell, Samuel Gordon, John Hennessy, Michael Hoenk, Shouleh Nikzad, David Schiminovich, D. Christopher Martin

Proceedings Volume 9144, 91442X (2014) https://doi.org/10.1117/12.2056204

KEYWORDS: Coating, Silica, Ultraviolet radiation, Spectrographs, Sensors, Charge-coupled devices, Quantum efficiency, Absorption, Silicon, Galactic astronomy

Read Abstract +

Proceedings Article | 25 September 2013 Paper

Paper

Wide band antireflection coatings deposited by atomic layer deposition

April Jewell, John Hennessy, Michael Hoenk, Shouleh Nikzad

Proceedings Volume 8820, 88200Z (2013) https://doi.org/10.1117/12.2025198

KEYWORDS: Atomic layer deposition, Silicon, Antireflective coatings, Optical coatings, Transmission electron microscopy, Sensors, Oxides, Silica, Interfaces, Titanium dioxide

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Showing 5 of 39 publications

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