Patents by Inventor Cristopher C. Eugster

Cristopher C. Eugster 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).

  • Quantum field-effect directional coupler
    Patent number: 5105232
    Abstract: A quantum field-effect directional coupler is described comprised of two quantum waveguides closely spaced apart with an adjacent gate electrode over the space between waveguides. The coupling of electron probability density between waveguides is controlled by the voltage applied to the gate electrode. The coupler implements a voltage-controlled current switch. Several couplers can be connected to perform multiplex/demultiplexing functions.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: April 14, 1992
    Assignee: Massachusetts Institute of Technology
    Inventors: Jesus A. del Alamo, Cristopher C. Eugster
  • X-ray detector
    Patent number: 4873439
    Abstract: X-ray detection systems based upon the nonlinear optical properties of multiple quantum well (MQW) semiconductor structures is described. X-rays generate carriers which change the index of refraction of the MQW material. Light from a probe beam may be scattered or reflected off the MQW structure and modulated by the change in refractive index caused by the carriers generated by the incident x-ray photons. A planar and microetalon approach is illustrated.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: October 10, 1989
    Assignee: Massachusetts Institute of Technology
    Inventors: Peter L. Hagelstein, Cristopher C. Eugster