Amit Agrawal

US Patent:

6947958, Sep 20, 2005

Filed:

Sep 19, 2001

Appl. No.:

09/955820

Inventors:

Alan L. Davidson - Marina Del Rey CA, US
Amit Agrawal - Santa Monica CA, US
James Berney - Yorba Linda CA, US
John McLaughlin - Los Angeles CA, US
Robert Engle - Los Angeles CA, US

Assignee:

Sony Corporation - Tokyo
Sony Electronics Inc. - Park Ridge NJ

International Classification:

G06F017/00

US Classification:

707203, 7071041, 707707, 707 3

Abstract:

A process is provided for documenting the contents of at least one version of a plurality of data products stored in a database, at least one of the products being a composite product having at least a portion of at least one of the data products included therein. The process includes the steps of: creating a state file to be associated with a version of a composite product to be created, the state file specifying a selected version of at least one selected data product to be used in creating the composite product; using the state file to access the selected version of the selected product from the database; creating the version of the composite product by including therein at least a portion of the selected version of the selected product; and generating a state history file associated with the version of the composite product, the state history file indicating that at least a portion of the selected version of the selected product is included within the version of the composite product. The documenting process also includes the steps of: assigning a product name to the composite product; storing the version of the composite product in the database; and storing the state history file in the database. The documenting further includes a step of assigning a version value to the version of the composite product.

US Patent:

20060230241, Oct 12, 2006

Filed:

Mar 30, 2005

Appl. No.:

11/094771

Inventors:

Kalpesh Mehta - Chandler AZ, US
Amit Agrawal - Chandler AZ, US

International Classification:

G06F 13/00

US Classification:

711154000

Abstract:

An embodiment includes an apparatus that includes a first data processor component to output data in a first data organization. The apparatus also includes a data storage logic to receive the data output from the first data processor component. The data storage logic is to rearrange the data into a second data organization prior to storage of the data into a data storage. The second data organization is a native format of a second data processor component to subsequently process the data.

US Patent:

20130201544, Aug 8, 2013

Filed:

Feb 1, 2013

Appl. No.:

13/756605

Inventors:

National Institute of Standards and Technology - Gaithersburg MD, US
Erich C. Walter - Silver Spring MD, US
Amit Agrawal - Syracuse NY, US
Albert Alec Talin - Gaithersburg MD, US
Ting Xu - Gaithersburg MD, US

Assignee:

National Institute of Standards and Technology - Gaithersburg MD

International Classification:

G02F 1/153

US Classification:

359265, 977773

Abstract:

Various plasmonic structures in the form of electrochromic optical switches are described which exhibit relatively high optical switching contrast. The switches generally include a collection of nanoslits formed in a thin electrically conductive film. An electrochromic material is disposed on the conductive film and along the sidewalls of the nanoslit(s).

US Patent:

20220390760, Dec 8, 2022

Filed:

Jun 2, 2022

Appl. No.:

17/831003

Inventors:

- College Park MD, US
- Gaithersburg MD, US
Vladimir AKSYUK - Gaithersburg MD, US
Wenqi ZHU - Vienna VA, US
Amit Kumar AGRAWAL - Rockville MD, US

International Classification:

G02B 27/42
G02B 5/18

Abstract:

An apparatus for light delivery to magneto-optical trap (MOT) system utilizes only planar optical diffraction devices including a planar-integrated-circuit PIC and a metasurface MS. When MOT is based on the use of a diffraction grating, a grating chip is additionally employed to launch and manipulate light for laser cooling. Bridging the gap between the sub-micrometer-scale guided mode on the PIC and the centimeter-scale beam needed for laser cooling, a magnification of the mode area by about 10is demonstrated using an on-chip extreme-mode-converter to launch a Gaussian mode into free space from a PIC-waveguide and a beam-shaping, polarization-dependent MS to form a diverging laser beam with a flat-top spatial profile, which efficiently illuminates the grating chip without loss of light. Comparison to equivalent Gaussian-beam-illuminated GMOTs evidences advantageous power efficiency of operation of the proposed light delivery system as compared with conventional systems employing Gaussian distribution of illumination at the grating chip.

US Patent:

20210270916, Sep 2, 2021

Filed:

Feb 25, 2021

Appl. No.:

17/185184

Inventors:

- Gaithersburg MD, US
Amit Kumar Agrawal - Rockville MD, US
Nandita Abhyankar - Rockville MD, US

International Classification:

G01R 33/345
G01R 33/60
H01P 7/08
G01R 33/46

Abstract:

A planar inverse anapole microresonator includes: an anapolic substrate; an anapolic conductor that includes a first and second inverse anapolic pattern; each inverse anapolic pattern including: a semi annular arm that terminates in a first arm tendril and a second arm tendril; and a medial arm terminating at a medial tip, and the medial tip of the first inverse anapolic pattern opposes the medial tip of the second inverse anapolic pattern, such that the medial tip of the first inverse anapolic pattern is separated from the medial tip of the second inverse anapolic pattern by a medial gap, and the planar inverse anapole microresonator produces a magnetic field region that concentrates a magnetic field localized between the medial tip of the first inverse anapolic pattern and the medial tip of the second inverse anapolic pattern in response to the planar inverse anapole microresonator being subjected to microwave radiation.

US Patent:

20210262077, Aug 26, 2021

Filed:

May 7, 2021

Appl. No.:

17/315108

Inventors:

- College Park MD, US
- Gaithersburg MD, US
Amit Kumar AGRAWAL - Rockville MD, US
David R. CARLSON - Boulder CO, US
Henri LEZEC - Silver Spring MD, US

International Classification:

C23C 14/00
C23C 14/08
C23C 14/58
G02F 1/00
C23C 14/34
G02B 5/30
G02B 5/18

Abstract:

High-performance optical-metasurface-based platform configured with the use of Tantalum Pentoxide to operate with extremely low levels of loss at frequencies of UV light and, in particular, in mid- and near-UV ranges and performing multiple optical-wavefront-shaping functions (among which there are high-numerical-aperture lensing, accelerating beam generation, and hologram projection). Process of fabrication of such metasurface producing near-zero levels of optical loss and employing the otherwise standard etching methodologies. Embodiments facilitate the development of low-form-factor, multifunctional ultraviolet nanophotonic platforms based on flat optical components and enabling diverse applications including lithography, imaging, spectroscopy, and quantum information processing.

US Patent:

20190386749, Dec 19, 2019

Filed:

May 10, 2019

Appl. No.:

16/409059

Inventors:

- Gaithersburg MD, US
Amit Agrawal - Bethesda MD, US
Wenqi Zhu - Arlington VA, US
Cheng Zhang - Gaithersburg MD, US
Shawn Divitt - Gaithersburg MD, US

International Classification:

H04B 10/2513
H04B 10/071

Abstract:

A metasurface optical pulse shaper includes a metasurface with superpixels disposed on an entry side of the metasurface and a wire grid polarizer disposed on an exit surface of the metasurface for controlling a phase, amplitude, or polarization of an optical pulse, wherein the metasurface in combination with dispersers provide for optical shaping of the optical pulse. A process for optically changing a pulse shape includes dispersing a primary optical pulse; separating spatially, by frequency, primary frequency waves; changing, by superpixels, a relative phase of the primary frequency waves and producing phase waves that are separated spatially by frequency and phase; and producing a plurality of shaped frequency waves such that, from an individual phase wave, a shaped frequency wave is produced that separated spatially by frequency and phase, such that a superposition of shaped frequency waves produce a shaped optical pulse that has pulse shape that is different than the primary optical pulse.