The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 15, 2006
Filed:
Aug. 30, 2003
Federico Capasso, Cambridge, MA (US);
Alfred Yi Cho, Summit, NJ (US);
Raffaele Colombelli, Paris, FR;
Claire F. Gmachl, Princeton, NJ (US);
Oskar Jon Painter, Sierra Madre, CA (US);
Arthur Mike Sergent, New Providence, NJ (US);
Deborah Lee Sivco, Warren, NJ (US);
Kartik Srinivasan, Pasadena, CA (US);
Donald Milan Tennant, Gillette, NJ (US);
Mariano Troccoli, Cambridge, MA (US);
Federico Capasso, Cambridge, MA (US);
Alfred Yi Cho, Summit, NJ (US);
Raffaele Colombelli, Paris, FR;
Claire F. Gmachl, Princeton, NJ (US);
Oskar Jon Painter, Sierra Madre, CA (US);
Arthur Mike Sergent, New Providence, NJ (US);
Deborah Lee Sivco, Warren, NJ (US);
Kartik Srinivasan, Pasadena, CA (US);
Donald Milan Tennant, Gillette, NJ (US);
Mariano Troccoli, Cambridge, MA (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
An optoelectronic transducer comprises a unipolar, intraband active region and a micro-cavity resonator. The resonator includes a 2D array of essentially equally spaced regions that exhibits resonant modes. Each of the spaced regions has a depth that extends through the active region and has an average refractive index that is different from that of the active region. The refractive index contrast, the spacing of the spaced regions, and the dimensions of the spaced regions are mutually adapted so that the array acts as a micro-cavity resonator and so that at least one frequency of the resonant modes of the array falls within the spectrum of an optoelectronic parameter of the active region (i.e., the gain spectrum where the transducer is a laser; the absorption spectrum where the transducer is a photodetector). In a first embodiment, the transducer is an ISB laser, whereas in a second embodiment it is a unipolar, intraband photodetector. In other embodiments, the laser is a surface-emitting ISB laser and the photodetector is a vertically-illuminated detector. In another embodiment, a nonlinear optical material is optically coupled to the micro-cavity resonator, which in one case allows an ISB laser to exhibit bistable operation.