Roberto R Panepucci

US Patent:

7274835, Sep 25, 2007

Filed:

Feb 18, 2004

Appl. No.:

10/781339

Inventors:

Roberto R. Panepucci - Miami FL, US
Bojan (Rob) Ilic - Ithaca NY, US
Michal Lipson - Ithaca NY, US
Vilson Rosa de Almeida - Ithaca NY, US

Assignee:

Cornell Research Foundation, Inc. - Ithaca NY

International Classification:

G02B 6/26

US Classification:

385 12, 385 13

Abstract:

A substrate incorporates a mechanical cantilever resonator with passive integrated optics for motion detection. The resonator acts as a waveguide, and enables optical detection of deflection/displacement amplitude, including oscillations. In one embodiment, the cantilever comprises a silicon waveguide suspended over a substrate. A reflector structure faces a free end of the suspending cantilever, or a waveguide is supported facing the free end of the suspended cantilever to receive light transmitted through the silicon waveguide cantilever. Deflection/displacement of the cantilever results in modulation of the light received from its free end that is representative of the displacement. Ring resonators may be used to couple different wavelength light to the waveguides, allowing formation of an array of cantilevers.

US Patent:

7400798, Jul 15, 2008

Filed:

May 25, 2005

Appl. No.:

11/137126

Inventors:

Vilson Rosa de Almeida - Sao Jose dos Campos, BR
Carlos Angulo Barrios - Toledo, ES
Roberto R. Panepucci - Miami FL, US
Michal Lipson - Ithaca NY, US

Assignee:

Cornell Research Foundation, Inc. - Ithaca NY

International Classification:

G02B 6/26

US Classification:

385 32, 385131, 385132, 385 14, 385 31, 385 27, 385 30

Abstract:

Fast, all optical switching of light is provided on silicon, using highly light confining structures to enhance the sensitivity of light to small changes in refractive index. In one embodiment, the light confining structures are silicon micrometer-size planar ring resonators which operate with low pump light pulse energies.

US Patent:

7519257, Apr 14, 2009

Filed:

Nov 25, 2005

Appl. No.:

11/287159

Inventors:

Michal Lipson - Ithaca NY, US
Carlos Angulo Barrios - Toledo, ES
Vilson Rosa de Almeida - Sao Jose dos Campos, BR
Roberto R. Panepucci - Miami FL, US
Qianfan Xu - Ithaca NY, US

Assignee:

Cornell Research Foundation, Inc. - Ithaca NY

International Classification:

G02B 6/00

US Classification:

385126, 385132

Abstract:

A high-index-contrast waveguide structure material used to guide light through a low-refractive-index material. In one embodiment, the waveguide structures are capable of guiding and confining light in such a way that very high optical intensity is obtained in a small cross-sectional area or gap filled with any material with sufficiently low refractive index, relative to the remainder of the structure. The structure may be used to form resonators, optical couplers, directional optical couplers and other optical devices. Structures may be formed consistent with integrated circuit forming processes.

US Patent:

7536070, May 19, 2009

Filed:

Jan 29, 2007

Appl. No.:

11/699705

Inventors:

Vilson Rosa de Almeida - Ithaca NY, US
Carlos Angulo Barrios - Ithaca NY, US
Roberto R. Panepucci - Ithaca NY, US
Michal Lipson - Ithaca NY, US

Assignee:

Cornell Research Foundation, Inc. - Ithaca NY

International Classification:

G02B 6/26

US Classification:

385 31, 385 39

Abstract:

Ring or disc optical resonators are provided with random or coherent corrugation on a top surface to cause optical power to be radiated in a desired direction by light scattering. The resonators may be positioned proximate a waveguide, either in-plane or inter-plane with the waveguide. The resonators are used in a polymeric photonic display. Light at each fundamental color is generated by light emitting diodes, such as organic light emitting diodes (OLEDs). The light is coupled into waveguides that cross an array of diffractive elements, such as the resonators, each combined with an optical modulator, such as a polymer electro-optic (EO) modulator. The modulator allows light from the waveguides to reach the diffractive elements. Control lines run across the waveguides, and provide control signals to the modulators, allowing one row of diffractive elements at a time to receive light from the waveguides. The rows are scanned and synchronized with light generated by the OLEDs.

US Patent:

20040240782, Dec 2, 2004

Filed:

Dec 22, 2003

Appl. No.:

10/745833

Inventors:

Vilson de Almeida - Ithaca NY, US
Carlos Barrios - Ithaca NY, US
Roberto Panepucci - Ithaca NY, US
Michal Lipson - Ithaca NY, US

Assignee:

Cornell Research Foundation, Inc.

International Classification:

G02B006/26

US Classification:

385/027000, 385/031000

Abstract:

Ring or disc optical resonators are provided with random or coherent corrugation on a top surface to cause optical power to be radiated in a desired direction by light scattering. The resonators may be positioned proximate a waveguide, either in-plane or inter-plane with the waveguide. The resonators are used in a polymeric photonic display. Light at each fundamental color is generated by light emitting diodes, such as organic light emitting diodes (OLEDs). The light is coupled into waveguides that cross an array of diffractive elements, such as the resonators, each combined with an optical modulator, such as a polymer electro-optic (EO) modulator. The modulator allows light from the waveguides to reach the diffractive elements. Control lines run across the waveguides, and provide control signals to the modulators, allowing one row of diffractive elements at a time to receive light from the waveguides. The rows are scanned and synchronized with light generated by the OLEDs.