Richard E Linke

US Patent:

6649901, Nov 18, 2003

Filed:

Mar 14, 2002

Appl. No.:

10/098970

Inventors:

Tineke Thio - Princeton NJ
Richard A. Linke - Princeton NJ
Kelly M. Pellerin - Cranbury NJ
Thomas W. Ebbesen - Strasbourg, FR
Henri J. Lezec - Strasbourg, FR

Assignee:

NEC Laboratories America, Inc. - Princeton NJ

International Classification:

H01J 516

US Classification:

250216

Abstract:

An apparatus for enhanced light transmission is provided. The apparatus comprises a metal film having a first surface and a second surface, at least one aperture being provided in the metal film and extending from the first surface to the second surface. The at least one aperture comprises an entrance portion disposed on the first surface of the metal film and an exit portion disposed in the second surface of the metal film, each portion having a cross-sectional area in the plane of the corresponding metal film surface, wherein the cross-sectional area of the entrance portion is not equal to the cross-sectional area of the exit portion. A periodic surface topography is provided on at least one of the first and second surfaces of the metal film, the periodic surface topography comprising a plurality of surface features, wherein the geometry of each aperture entrance portion substantially matches the geometry of the surface features.

US Patent:

6834027, Dec 21, 2004

Filed:

Nov 27, 2000

Appl. No.:

09/721694

Inventors:

Mitsuhito Sakaguchi - Princeton NJ
Tineke Thio - Princeton NJ
Richard A. Linke - Princeton NJ
Thomas W. Ebbesen - Strasbourg, FR
Henri J. Lezec - Strasbourg, FR

Assignee:

NEC Laboratories America, Inc. - Princeton NJ

International Classification:

G11B 1100

US Classification:

369 1332, 36911227, 385129, 250216

Abstract:

A read/write head for an optical storage medium is provided. The read/write head comprises a waveguide having an end face and a plasmon-enhanced device provided on the end face of the waveguide. The plasmon-enhanced device comprises a metal film having a first surface and a second surface, the first surface being fixed to the waveguide end face, the metal film having an aperture provided therethrough. The metal film has a periodic surface topography provided on at least one of the first and second surfaces of the metal film. Light incident on one of the surfaces of the metal film interacts with a surface plasmon mode on at least one of the surfaces of the metal film thereby enhancing transmission of light through the aperture in the metal film which is directed onto and/or collected from the optical storage medium. A read/write head with an integral light source is also provided. The invention also provides an array of precisely aligned read/write heads, and an array of precisely aligned read/write heads with integral light sources, as well as side-emitting lasers and vertical cavity surface emitting lasers (VCSELs) with enhanced transmission.

US Patent:

60468300, Apr 4, 2000

Filed:

Sep 29, 1998

Appl. No.:

9/162556

Inventors:

Richard A. Linke - Lawrenceville NJ
Warren D. Smith - Plainsboro NJ

Assignee:

NEC Research Institute, Inc. - Princeton NJ

International Classification:

G03H 102
G03H 130
G03H 120
G03H 104

US Classification:

359 7

Abstract:

A method for dynamically refreshing a holographic data storage medium wherein data is stored in a plurality of data pages, each of which comprises a two dimensional pattern of pixel data. Each data page is stored by interfacing an image or a Fourier transform of the data page with a reference beam to form a holographic recording of the data page in the holographic medium. Pursuant to the method, all of the data pages are classified as either good pages, each of which was written into storage less than a threshold time ago related to the decay of the holographic recording, or empty pages available for writing, or self-erasing pages which are self-erasing with time. At sequential time intervals, the oldest good page is read which then becomes a self-erasing page, and its data is rewritten into an empty page which then becomes the youngest good page, and the oldest self-erasing page becomes an empty page.

US Patent:

6101009, Aug 8, 2000

Filed:

Sep 28, 1998

Appl. No.:

9/162099

Inventors:

Richard A. Linke - Princeton NJ
Ian R. Redmond - Princeton NJ

Assignee:

NEC Research Institute, Inc. - Princeton NJ

International Classification:

G03H 126
G03H 102

US Classification:

359 22

Abstract:

A holographic data storage and/or retrieval apparatus having a spherical holographic recording medium and addressing means for rotating the recording medium to selectively expose the recording medium to data and reference beams at predetermined rotational positions. Whereby image data contained in the data beam is recorded in the recording medium and/or a data beam containing image data is reconstructed from the recording medium.

US Patent:

59204095, Jul 6, 1999

Filed:

May 31, 1996

Appl. No.:

8/820491

Inventors:

James D. Chadi - Princeton NJ
George E. Devlin - Warren NJ
Richard A. Linke - Princeton NJ
Robert L. MacDonald - Princeton NJ
Tineke Thio - Princeton NJ

Assignee:

NEC Research Institute, Inc. - Princeton NJ

International Classification:

G03H 102
G03H 108
G02B 532
H01L 2714

US Classification:

359 15

Abstract:

A compound semiconductor that is suitably doped to exhibit the DX effect is irradiated with an optical beam of spatially varying intensity whereby localized regions of persistently higher conductivity and lower refractive index are created in the semiconductor where sufficient intensity of the beam was incident. The persistently higher conductive region can be used to bridge selected gaps in conductive paths on a support member use in memory device and the regions of lower refractive index can be used to providing guiding in a wave guide, to form high resolution gratings, or to form holograms.

US Patent:

51912198, Mar 2, 1993

Filed:

Apr 19, 1991

Appl. No.:

7/688160

Inventors:

Richard A. Linke - Princeton NJ

Assignee:

NEC Research Institute, Inc. - Princeton NJ

International Classification:

G02B 2700
G02B 600

US Classification:

250551

Abstract:

An information processing system uses a planar optical waveguide as a shared medium for a plurality of its subsystems. To this end, each subsystem is provided with a light emitting diode to broadcast information pulses into the shared medium and a photodetector for receiving the information pulses broadcast by the light emitting diodes. This thereby reduces the need for conductive interconnections between subsystems. Additionally, a number of planar optical waveguides can be stacked on a support and different compositions of subsystems communicate with one another by using different waveguides of the stack. The system can be adapted for time-division, space-division and frequency division multiplexing.