Dr. David Alejandro Ramirez Profile

Dr. David Alejandro Ramirez

Program Manager at BAE Systems Inc

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Author

Publications (13)

Proceedings Article | 30 May 2022 Presentation

Geiger-mode Avalanche Photodiode (GmAPD) arrays for single photon imaging

Piotr Kondratko, David Ramirez, Olaleye Aina, Alex Harwit, Ronda Irwin

Proceedings Volume PC12110, PC1211002 (2022) https://doi.org/10.1117/12.2626160

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Proceedings Article | 5 March 2022 Presentation

High-performance Geiger-mode avalanche photodiode sensors for LIDAR

Stephen Segal, Olaleye Aina, Jason Gaines, Alex Harwit, Ronda Irwin, Piotr Kondratko, Matthew Little, William Painter, David Ramirez, David Shelton, Amber Strevey, Jacob Wilson

Proceedings Volume PC12008, PC120080C (2022) https://doi.org/10.1117/12.2607810

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Proceedings Article | 7 December 2016 Presentation

Comparison of MWIR unipolar barrier structures based on strained layer superlattices (Conference Presentation)

David Ramirez, Stephen Myers, Yuliya Kuznetsova, Sen Mathews, Theodore Schuler-Sandy, Elizabeth Steenbergen, Christian Morath, Vicent Cowan, Sanjay Krishna

Proceedings Volume 9974, 99740C (2016) https://doi.org/10.1117/12.2239723

KEYWORDS: Superlattices, Mid-IR, Sensors, Structural design, Ionizing radiation, Silicon, Analytical research, Infrared sensors, Current controlled current source

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Proceedings Article | 20 May 2016 Paper

Development of dual-band barrier detectors

Elena Plis, Stephen Myers, David Ramirez, Sanjay Krishna

Proceedings Volume 9819, 981911 (2016) https://doi.org/10.1117/12.2228166

KEYWORDS: Sensors, Infrared sensors, Superlattices, Infrared radiation, Long wavelength infrared, Quantum efficiency, Gallium antimonide, Photodetectors, Absorption, Infrared photography

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Proceedings Article | 1 September 2015 Paper

MWIR unipolar barrier photodetectors based on strained layer superlattices

David Ramirez, Stephen Myers, Elena Plis, Yuliya Kuznetsova, Christian Morath, Vincent Cowan, Sanjay Krishna

Proceedings Volume 9616, 96160F (2015) https://doi.org/10.1117/12.2188332

KEYWORDS: Mid-IR, Sensors, Photodetectors, Superlattices, Quantum efficiency, Laser sintering, Absorption, Electrons, Etching, Temperature metrology

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Proceedings Article | 4 June 2015 Paper

High-operating temperature MWIR unipolar barrier photodetectors based on strained layer superlattices

David Ramirez, Elena Plis, Stephen Myers, Christian Morath, Vincent Cowan, Sanjay Krishna

Proceedings Volume 9451, 945113 (2015) https://doi.org/10.1117/12.2176908

KEYWORDS: Sensors, Mid-IR, Quantum efficiency, Photodetectors, Superlattices, Temperature metrology, Measurement devices, Electrons, Diffusion, Etching

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Proceedings Article | 17 September 2014 Paper

High operating temperature midwave infrared photodetectors based on InAs/GaSb type II strained layer superlattices

David Ramirez, Elena Plis, Stephen Myers, Laura Treider, Eli Garduno, Christian Morath, Vincent Cowan, Sanjay Krishna

Proceedings Volume 9226, 92260Q (2014) https://doi.org/10.1117/12.2064045

KEYWORDS: Laser sintering, Sensors, Mid-IR, Quantum efficiency, Gallium antimonide, Photodetectors, Superlattices, Temperature metrology, Interfaces, Indium arsenide

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Proceedings Article | 28 April 2010 Paper

Modeling negative feedback in single-photon avalanche diodes

Majeed Hayat, David Ramirez, Graham Rees, Mark Itzler

Proceedings Volume 7681, 76810W (2010) https://doi.org/10.1117/12.851914

KEYWORDS: Resistors, Diodes, Stochastic processes, Avalanche photodetectors, Ionization, Monte Carlo methods, Quenching (fluorescence), Negative feedback, Avalanche photodiodes, Statistical analysis

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Proceedings Article | 23 January 2010 Paper

Model for passive quenching of SPADs

Majeed Hayat, Mark Itzler, David Ramirez, Graham Rees

Proceedings Volume 7608, 76082B (2010) https://doi.org/10.1117/12.847005

KEYWORDS: Stochastic processes, Resistors, Diodes, Ionization, Avalanche photodetectors, Quenching (fluorescence), Monte Carlo methods, Negative feedback, Avalanche photodiodes, Sensors

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Proceedings Article | 29 April 2009 Paper

Demonstration of the quantum dot avalanche photodiode (QDAP)

David Ramirez, Jiayi Shao, Majeed Hayat, Sanjay Krishna

Proceedings Volume 7320, 73200L (2009) https://doi.org/10.1117/12.818778

KEYWORDS: Avalanche photodetectors, Sensors, Gallium arsenide, Avalanche photodiodes, Quantum dots, Reflectivity, Amplifiers, Signal to noise ratio, Photons, Quantum well infrared photodetectors

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Proceedings Article | 2 May 2008 Paper

Multicolor quantum dots-in-a-well focal plane arrays

Thomas Vandervelde, Michael Lenz, Eric Varley, Ajit Barve, Jiayi Shao, Rajeev Shenoi, David Ramirez, Wooyong Jang, Yagya Sharma, Sanjay Krishna

Proceedings Volume 6940, 694003 (2008) https://doi.org/10.1117/12.782123

KEYWORDS: Staring arrays, Sensors, Long wavelength infrared, Gallium arsenide, Mid-IR, Photodetectors, Quantum efficiency, Quantum wells, Quantum well infrared photodetectors, Quantum dots

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Proceedings Article | 26 September 2007 Paper

Plasmon assisted photonic crystal quantum dot sensors

R. Shenoi, D. Ramirez, Y. Sharma, R. Attaluri, J. Rosenberg, O. Painter, S. Krishna

Proceedings Volume 6713, 67130P (2007) https://doi.org/10.1117/12.735724

KEYWORDS: Sensors, Metals, Quantum dots, Photonic crystals, Gallium arsenide, Plasmons, Plasmonics, Mid-IR, Interfaces, Long wavelength infrared

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Proceedings Article | 26 September 2007 Paper

Demonstration of a two-color 320×256 quantum dots-in-a-well focal plane array

Eric Varley, David Ramirez, Jay Brown, Sang Jun Lee, Andreas Stintz, Michael Lenz, Sanjay Krishna, Axel Reisinger, Mani Sundaram

Proceedings Volume 6678, 66780T (2007) https://doi.org/10.1117/12.732566

KEYWORDS: Staring arrays, Long wavelength infrared, Mid-IR, Sensors, Infrared radiation, Photodetectors, Quantum dots, Infrared photography, Quantum well infrared photodetectors, Quantum wells

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Showing 5 of 13 publications

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