Dr. Alireza Bonakdar Profile

Dr. Alireza Bonakdar

Optical Engineer at Omnivision Technologies Inc

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Author

Publications (21)

Proceedings Article | 3 September 2015 Paper

Ultra-compact hourglass lens for integrated cameras

Mohsen Rezaei, Iman Hasani Nia, Alireza Bonakdar, Hooman Mohseni

Proceedings Volume 9578, 957809 (2015) https://doi.org/10.1117/12.2188822

KEYWORDS: Cameras, Imaging systems, Point spread functions, Silicon, Lens design, Image sensors, Super resolution, Modulation transfer functions, Infrared cameras, Sensors

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Proceedings Article | 28 August 2015 Presentation + Paper

Low-cost and high-throughput realization of metasurface-based absorber/emitter for thermal-photovoltaic cells

Alireza Bonakdar, Mohsen Rezaei, Eric Dexheimer, Hooman Mohseni

Proceedings Volume 9547, 954725 (2015) https://doi.org/10.1117/12.2189232

KEYWORDS: Absorption, Deep ultraviolet, Dielectric polarization, FT-IR spectroscopy, Magnetism, Energy harvesting, Infrared radiation, Dielectrics, Photoresist materials, Thermography

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Proceedings Article | 26 August 2015 Presentation + Paper

Optomechanical nanoantenna: far-field control of near-field through mechanical reconfiguration

Alireza Bonakdar, Robert Brown, Sung Jun Jang, Vala Fathipour, Iman Hassani Nia, Mohsen Rezaei, Hooman Mohseni

Proceedings Volume 9556, 95560N (2015) https://doi.org/10.1117/12.2188301

KEYWORDS: Antennas, Near field optics, Near field, Electron beam lithography, Nonlinear optics, Reactive ion etching, Switching, Scattering, Plasmonics, Nanoantennas

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Proceedings Article | 7 October 2014 Paper

Dual behavior of optical antenna integrated with sub-wavelength photodetector to achieve ultra-high specific detectivity

Alireza Bonakdar, Robert Brown, Hooman Mohseni

Proceedings Volume 9220, 92200K (2014) https://doi.org/10.1117/12.2065001

KEYWORDS: Sensors, Antennas, Quantum efficiency, Optical antennas, Photodetectors, Near field optics, Near field, Absorption, Semiconductors, Signal to noise ratio

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Proceedings Article | 3 October 2014 Paper

Embedded plasmonic-enhanced quantum well infrared photodetector

Robert Brown, Alireza Bonakdar, Sung Jang, Omer Memis, Hooman Mohseni

Proceedings Volume 9220, 922005 (2014) https://doi.org/10.1117/12.2065128

KEYWORDS: Quantum well infrared photodetectors, Plasmonics, Signal to noise ratio, Signal processing, Metals, Quantum efficiency, Sensors, Absorption, Photoresist materials, Etching

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Proceedings Article | 3 September 2014 Paper

Deep UV microsphere nanolithography to achieve sub-100 nm feature size

Alireza Bonakdar, Sung Jun Jang, Robert Brown, Mohsen Rezaei, Hooman Mohseni

Proceedings Volume 9170, 917016 (2014) https://doi.org/10.1117/12.2064987

KEYWORDS: Deep ultraviolet, Nanolithography, Lithography, Photoresist materials, Optical lithography, Silica, Nanostructures, Optics manufacturing, Thermography, Ultraviolet radiation

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Proceedings Article | 27 August 2014 Paper

Optical, electrical and structural study of metallic nano-structured thin films fabricated by oblique angle deposition

Sung Jun Jang, Alireza Bonakdar, Hooman Mohseni

Proceedings Volume 9172, 91720T (2014) https://doi.org/10.1117/12.2062301

KEYWORDS: Metals, Silver, Resistance, Transmittance, Scanning electron microscopy, Chromium, Aluminum, Germanium, Nanolithography, Reflectivity

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Proceedings Article | 26 September 2013 Paper

Tilted exposure microsphere nanolithography for high-throughput and mask-less fabrication of plasmonic molecules

Alireza Bonakdar, Sung Jun Jang, Hooman Mohseni

Proceedings Volume 8816, 881614 (2013) https://doi.org/10.1117/12.2025099

KEYWORDS: Nanolithography, Photoresist materials, Plasmonics, Molecules, Metals, Scanning electron microscopy, Ultraviolet sources, Optical lithography, Finite-difference time-domain method, Ultraviolet radiation

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Proceedings Article | 20 September 2013 Paper

Super resolution mapping of the near optical field and the gradient optical force

Ryan Gelfand, Alireza Bonakdar, O. Gokalp Memis, Hooman Mohseni

Proceedings Volume 8815, 88150R (2013) https://doi.org/10.1117/12.2024779

KEYWORDS: Near field optics, Atomic force microscopy, Near field scanning optical microscopy, Antennas, Plasmonics, Optical amplifiers, Near field, Microscopes, Modulation, Molecules

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Proceedings Article | 19 September 2013 Paper

Embedded plasmonic quantum well infrared photodetector

Robert Brown, Alireza Bonakdar, Omer Memis, Vala Fathipour, Sung Jun Jang, Hooman Mohseni

Proceedings Volume 8868, 886808 (2013) https://doi.org/10.1117/12.2025299

KEYWORDS: Quantum well infrared photodetectors, Plasmonics, Metals, Etching, Sensors, Quantum efficiency, Quantum wells, Semiconductors, Reactive ion etching, Dielectrics

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Proceedings Article | 11 September 2013 Paper

Hybrid optical antenna with high directivity gain

Alireza Bonakdar, Hooman Mohseni

Proceedings Volume 8809, 880916 (2013) https://doi.org/10.1117/12.2025178

KEYWORDS: Antennas, Quantum efficiency, Dielectrics, Absorption, Optical antennas, Near field optics, Diffraction, Quantum information, Near field, Chemical elements

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Proceedings Article | 15 October 2012 Paper

Optomechanical beam steering by surface plasmon nanoantenna

Alireza Bonakdar, John Kohoutek, Hooman Mohseni

Proceedings Volume 8456, 84560C (2012) https://doi.org/10.1117/12.931270

KEYWORDS: Antennas, Near field optics, Beam steering, Phased array optics, Surface plasmons, Phase shifts, Microwave radiation, Phased arrays, Metals, Nanoantennas

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Proceedings Article | 15 October 2012 Paper

Antenna integrated quantum cascade laser switchable via telecommunications wavelength probe beam

John Kohoutek, Alireza Bonakdar, Dibyendu Dey, Ryan Gelfand, Iman Hassani Nia, O. Memis, Vala Fathipour, Hooman Mohseni

Proceedings Volume 8456, 845606 (2012) https://doi.org/10.1117/12.929721

KEYWORDS: Antennas, Quantum cascade lasers, Modulation, Germanium, Switches, Near field optics, Polarization, Absorption, Telecommunications, Switching

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Proceedings Article | 15 October 2012 Paper

Nano-opto-mechanically modulated plasmonic nanoantenna-integrated quantum cascade laser

John Kohoutek, Dibyendu Dey, Alireza Bonakdar, Ryan Gelfand, Vala Fathipour, Omer Gokalp Memis, Hooman Mohseni

Proceedings Volume 8456, 84560K (2012) https://doi.org/10.1117/12.2006932

KEYWORDS: Quantum cascade lasers, Modulation, Antennas, Plasmonics, Atomic force microscopy, Sensors, Amplitude modulation, Near field optics, Reflectivity, Near field

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Proceedings Article | 9 October 2012 Paper

Detectivity of plasmonic enhanced photodetectors based on nondegenerate two-photon absorption process

Alireza Bonakdar, John Kohoutek, Hooman Mohseni

Proceedings Volume 8457, 84572K (2012) https://doi.org/10.1117/12.931262

KEYWORDS: Photons, Absorption, Semiconductors, Signal detection, Sensors, Signal processing, Mid-IR, Photodetectors, Surface plasmons, Quantum efficiency

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Proceedings Article | 9 September 2011 Paper

Opto-mechanical force measurement of deep sub-wavelength plasmonic modes

John Kohoutek, Dibyendu Dey, Alireza Bonakdar, Alejandro Sklar, Omer Memis, Ryan Gelfand, Hooman Mohseni

Proceedings Volume 8097, 80971T (2011) https://doi.org/10.1117/12.891888

KEYWORDS: Near field optics, Atomic force microscopy, Antennas, Near field, Plasmonics, Optical amplifiers, Near field scanning optical microscopy, Sensors, Optical fibers, Modulation

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Proceedings Article | 14 May 2011 Paper

A new generation of mid-infrared sensors based on quantum cascade laser

Dibyendu Dey, John Kohoutek, Ryan Gelfand, Alireza Bonakder, Hooman Mohseni

Proceedings Volume 8034, 803404 (2011) https://doi.org/10.1117/12.884815

KEYWORDS: Antennas, Quantum cascade lasers, Near field optics, Optical antennas, Near field scanning optical microscopy, Metals, Near field, Plasmonics, Mid-IR, Nanorods

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Proceedings Article | 11 September 2010 Paper

Near field imaging of a plasmon photonic crystal patterned on the facet of a quantum cascade laser

Dibyendu Dey, Ryan Gelfand, John Kohoutek, Alireza Bonakdar, Hooman Mohseni

Proceedings Volume 7757, 77573H (2010) https://doi.org/10.1117/12.861450

KEYWORDS: Photonic crystals, Quantum cascade lasers, Near field scanning optical microscopy, Near field optics, Near field, Mid-IR, Silica, Gold, Plasmonics, Molecules

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Planar photonic crystal (PPC) has recently attracted much attention as a promising platform for the realization of compact nanocavity devices. Our proposed photonic crystal (PC) structure consists of a periodic hole array with a point defect at the center. The device has been integrated on the facet of a quantum cascade laser working in the mid-infrared region of optical spectrum. Finite-difference time domain (FDTD) simulations have been performed to optimize the design structure. Simulations showed that with a periodicity of the holes (Λ) between 1.3um and 1.4um, the near field enhancement at the center of the cavity on the same level as the top metal surface can be as high as 10 times the incident electric field. The radius of the hole and center cavity radius are 0.45 and 0.2 times Λ. The structure was simulated at experimentally measured operating wavelength (λ=5.98um) of our device. During fabrication, we used a buffer SiO₂ layer thickness of 100nm followed by metal-dielectric-metal structure with layer thicknesses of Au - SiO₂ -Au (100/20/ 100 nm). Next, the MDM photonic crystal design was fabricated on the MDM coated facet of the QCL using focused ion beam (FIB) milling. The integrated device has been tested using an apertureless mid-infrared near field scanning optical microscopy (a-NSOM). The measurement set-up is based on an inverted microscope coupled with a commercially available Atomic Forced Microscopy (AFM). Using this technique, we could simultaneously measure the topography and NSOM image of the photonic crystal integrated QCL. It showed that the combination of high quality factor and extremely low mode volume of the PC design can squeeze the optical mode within a nanometric spot size ~ 450nm. The experimental results is a proof of concept, although we believe, further optimization and improvisation with different PC designs can lead squeezing the optical mode into a much smaller volume. Such integrated device are capable of focusing radiant infrared light down to nanometer length scale and strongly enhance the near field intensity which can be extremely useful in molecular sensing.

Proceedings Article | 26 August 2010 Paper

An apertureless near-field scanning optical microscope for imaging surface plasmons in the mid-wave infrared

John Kohoutek, Dibyendu Dey, Ryan Gelfand, Alireza Bonakdar, Hooman Mohseni

Proceedings Volume 7787, 77870R (2010) https://doi.org/10.1117/12.861582

KEYWORDS: Near field scanning optical microscopy, Antennas, Surface plasmons, Quantum cascade lasers, Atomic force microscopy, Optical amplifiers, Mid-IR, Optical microscopes, Sensors, Nanorods

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Proceedings Article | 18 August 2010 Paper

A normal-incident quantum well infrared photodetector enhanced by surface plasmon resonance

Wei Wu, Alireza Bonakdar, Ryan Gelfand, Hooman Mohseni

Proceedings Volume 7780, 77801A (2010) https://doi.org/10.1117/12.871877

KEYWORDS: Quantum wells, Quantum well infrared photodetectors, Surface plasmons, Photodetectors, Plasmonics, Infrared radiation, Gold, Infrared imaging, Infrared detectors, Resonance enhancement

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Proceedings Article | 16 August 2010 Paper

Quantum cascade laser integrated with metal-dielectric-metal plasmonic antenna

Dibyendu Dey, Ryan Gelfand, John Kohoutek, Alireza Bonakdar, Hooman Mohseni

Proceedings Volume 7789, 77890L (2010) https://doi.org/10.1117/12.861451

KEYWORDS: Antennas, Quantum cascade lasers, Plasmonics, Near field optics, Metals, Optical antennas, Near field, Surface plasmons, Applied physics, Nanorods

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Showing 5 of 21 publications

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