Paul D Hansen

US Patent:

8196217, Jun 5, 2012

Filed:

Aug 16, 2010

Appl. No.:

12/806632

Inventors:

Yao-Te Cheng - Yonghe, TW
Yin Yuen - San Francisco CA, US
Paul C. Hansen - Palo Alto CA, US
Yuzuru Takashima - Cupertino CA, US
Lambertus Hesselink - Atherton CA, US

Assignee:

The Board of Trustees of the Leland Stanford Junior University - Palo Alto CA

International Classification:

G01Q 60/22

US Classification:

850 32, 977862

Abstract:

Transmission efficiency and/or spatial resolution provided by resonant apertures can be enhanced by disposing a tip on part of the screen that extends laterally into the aperture. For example, a tip disposed on the ridge of a C-shaped aperture can dramatically improve performance. A spatial resolution of λ/50 has been experimentally demonstrated with this approach. The combination of high spatial resolution and high transmission efficiency provided by this approach enables many applications, such as near field optical probes for near field scanning optical microscopy (NSOM). Another application is high resolution electron sources, where an photoelectron emitter can be disposed at or near a tip+aperture structure such that the high resolution optical near-field provides a correspondingly high resolution electron source.

US Patent:

20220317029, Oct 6, 2022

Filed:

Apr 2, 2021

Appl. No.:

17/221759

Inventors:

- Baden, CH
Kyle Owen - East Palo Alto CA, US
John Savee - San Francisco CA, US
Dmitry Skvortsov - Sunnyvale CA, US
Paul Hansen - Palo Alto CA, US
Raphael Desbiens - Quebec City, CA

International Classification:

G01N 21/31

Abstract:

Systems and methods for skewed basis set fitting may include obtaining measured absorption data indicative of an amount of absorption of light by a sample gas at each of multiple frequencies, determining an absorption dependent cavity time constant indicative of a skew to the measured absorption data caused by light reflections within a cavity in which the sample gas is contained, obtaining reference absorption data including basis sets indicative of reference amounts of light absorbed by each of multiple gases at each of the multiple frequencies, skewing the reference absorption data based on the absorption dependent cavity time constant to generate skewed reference absorption data, and fitting the measured absorption data to the skewed reference absorption data to identify an amount of at least one constituent gas within the sample gas.

Address:

1839 Piccadilly Cir, Cape Coral, FL 33991

VIN:

5NMSH4AG9AH359286

Make:

HYUNDAI

Model:

SANTA FE

Year:

2010