Patents by Inventor Ljupka Stojcevska

Ljupka Stojcevska 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).

  • Ultrafast quench based nonvolatile bistable device
    Patent number: 9589631
    Abstract: The invention refers to an ultrafast quench based nonvolatile bistable device which consists of an active material on a passive or active substrate which changes its physical properties, after exposure to a sufficiently temporally short external perturbation causing an ultrafast quench. The perturbation can be from an external ultrashort laser pulse or ultrafast electrical pulse from an electrooptic device or any other generator of ultrashort pulses. This change of the materials properties can be detected as a change of optical properties or electrical resistance. The dielectric properties can be reverted back to their original state by the application of a heat pulse applied by an electrical heater within the device or an external laser.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: March 7, 2017
    Assignee: Institut “Jozef Stefan”
    Inventors: Ljupka Stojcevska, Tomaz Mertelj, Igor Vaskivskyi, Dragan Mihailovic
  • Ultrafast Nonvolatile Memory
    Publication number: 20150340089
    Abstract: The invention refers to an ultrafast quench based nonvolatile bistable device which consists of an active material on a passive or active substrate which changes its physical properties, after exposure to a sufficiently temporally short external perturbation causing an ultrafast quench. The perturbation can be from an external ultrashort laser pulse or ultrafast electrical pulse from an electrooptic device or any other generator of ultrashort pulses. This change of the materials properties can be detected as a change of optical properties or electrical resistance. The dielectric properties can be reverted back to their original state by the application of a heat pulse applied by an electrical heater within the device or an external laser.
    Type: Application
    Filed: September 30, 2013
    Publication date: November 26, 2015
    Inventors: Ljupka Stojcevska, Tomaz Mertelj, Igor Vaskivskyi, Dragan Mihailovic