Patents by Inventor Rafaelle Colombelli

Rafaelle Colombelli 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).

  • Intersubband light emitters with injection/relaxation regions doped to different levels
    Patent number: 6760354
    Abstract: In an intersubband light emitter, at least two injection/relaxation (I/R) regions contiguous with the same RT region have different doping levels. Preferably, one I/R region has a doping level that is at least 100 times lower than that of the other I/R region. In one embodiment, one I/R region is undoped, whereas the other I/R region is doped.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: July 6, 2004
    Assignee: Lucent Technologies Inc.
    Inventors: Federico Capasso, Alfred Yi Cho, Rafaelle Colombelli, Claire F. Gmachl, Trinesha Shenika Mosely, Axel Straub, Deborah Lee Sivco, Mariano Troccoli
  • Engineering the gain/loss profile of intersubband optical devices having heterogeneous cascades
    Patent number: 6728282
    Abstract: An optical device includes a stack of at least two different intersubband (ISB) optical sub-devices in which the gain/loss profiles of the individual ISB sub-devices are mutually adapted, or engineered, so as to generate a predetermined overall function for the combination. We define this combination device as being heterogeneous since not all of the individual ISB sub-devices are identical to one another. Illustratively, the parameters of each individual ISB sub-device that might be subject to this engineering process include: the peak energy of the ISB optical transitions (emission or absorption) associated with each RT region, the position of each sub-device in the stack; the oscillator strengths of these ISB transitions; the energy bandwidth of each transition; and the total length of the RT and I/R regions of each ISB sub-device.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: April 27, 2004
    Assignee: Lucent Technologies Inc.
    Inventors: Federico Capasso, Alfred Yi Cho, Rafaelle Colombelli, Claire F. Gmachl, Hock Min Ng, Deborah Lee Sivco
  • Intersubband light emitters with injection/relaxation regions doped to different levels
    Publication number: 20030174749
    Abstract: In an intersubband light emitter, at least two injection/relaxation (I/R) regions contiguous with the same RT region have different doping levels. Preferably, one I/R region has a doping level that is at least 100 times lower than that of the other I/R region. In one embodiment, one I/R region is undoped, whereas the other I/R region is doped.
    Type: Application
    Filed: March 12, 2002
    Publication date: September 18, 2003
    Inventors: Federico Capasso, Alfred Yi Cho, Rafaelle Colombelli, Claire F. Gmachl, Trinesha Shenika Mosely, Axel Straub, Deborah Lee Sivco, Mariano Troccoli