Patents by Inventor Kaushik Dayal

Kaushik Dayal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7346248
    Abstract: Systems and methods for manipulating light with tunable ferroelectric photonic devices. Devices having tunable properties that exhibit photonic bandgap behavior are fabricated from ferroelectric materials. Apparatus is provided to apply tuning signals to the ferroelectric material using one or more of electric fields, mechanical forces, optical fields, and thermal fields. Control circuitry is provided to generate the control signals needed to apply the tuning signals. Input and output ports are provided to allow input signals to be received and to provide output signals. In some cases, a feedback loop is provided to use a portion of the output signal as a diagnostic signal for control of the operation of the device within an acceptable range. It is expected that ferroelectric photonic devices operating according to principles of the invention will be useful for a wide variety of applications, including optical switching, optical modulation, optical computing, and performing logic optically.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: March 18, 2008
    Assignee: California Institute of Technology
    Inventors: Harry A. Atwater, Kaushik Bhattacharya, Kaushik Dayal, Matthew Dicken, Demetri Psaltis, Axel Scherer, Guruswami Ravichandran
  • Publication number: 20080019648
    Abstract: Systems and methods for manipulating light with tunable ferroelectric photonic devices. Devices having tunable properties that exhibit photonic bandgap behavior are fabricated from ferroelectric materials. Apparatus is provided to apply tuning signals to the ferroelectric material using one or more of electric fields, mechanical forces, optical fields, and thermal fields. Control circuitry is provided to generate the control signals needed to apply the tuning signals. Input and output ports are provided to allow input signals to be received and to provide output signals. In some cases, a feedback loop is provided to use a portion of the output signal as a diagnostic signal for control of the operation of the device within an acceptable range. It is expected that ferroelectric photonic devices operating according to principles of the invention will be useful for a wide variety of applications, including optical switching, optical modulation, optical computing, and performing logic optically.
    Type: Application
    Filed: August 1, 2006
    Publication date: January 24, 2008
    Applicant: California Institute of Technology
    Inventors: Harry Atwater, Kaushik Bhattacharya, Kaushik Dayal, Matthew Dicken, Demetri Psaltis, Axel Scherer, Guruswami Ravichandran