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:
Dec. 24, 2019
Filed:
Mar. 12, 2019
Northwestern University, Evanston, IL (US);
Battelle Memorial Institute, Columbus, OH (US);
The Trustees of Columbia University IN the City of New York, New York, NY (US);
Franz M. Geiger, Evanston, IL (US);
Paul E. Ohno, Evanston, IL (US);
Hong-fei Wang, Richland, WA (US);
Kenneth B. Eisenthal, New York City, NY (US);
Northwestern University, Evanston, IL (US);
Battelle Memorial Institute, Columbus, OH (US);
The Trustees of Columbia University in the City of New York, , NY (US);
Abstract
An apparatus for probing an interface via second harmonic generation (SHG) spectroscopy is provided. The apparatus comprises a sample cell comprising a noncentrosymmetric material having a selected orientation angle with respect to a reference axis; optics configured to illuminate an interface formed between the noncentrosymmetric material and a different material, or formed between two different materials and disposed over the noncentrosymmetric material, with light having a frequency ω under conditions to generate a second harmonic generation (SHG) signal having frequency 2ω; a detector configured to detect the SHG signal, the SHG signal comprising a bulk second harmonic signal from the noncentrosymmetric material and an interfacial second harmonic signal from the interface; and a device comprising a processor and a computer-readable medium operably coupled to the processor, the computer-readable medium having computer-readable instructions stored thereon that, when executed by the processor, cause the apparatus to: illuminate the interface to generate the SHG signal and detect the SHG signal.