公开(公告)号：US10823664B2

公开(公告)日：2020-11-03

申请号：US16446750

申请日：2019-06-20

Applicant: Wisconsin Alumni Research Foundation

Inventor： Darien James Morrow ,  Daniel David Kohler ,  John Curtis Wright

IPC: G01N21/25 ,  G01N21/63 ,  G01N21/17

Abstract: Methods for pump-probe spectroscopy are provided. In an embodiment, such a method comprises directing pump light having a frequency ωpump at a location in a sample to excite a transition between two quantum states of a target entity in the sample, directing probe light at the location to generate a coherent output signal having a frequency ωoutput and a wavevector koutput, and detecting the output signal as the probe light is scanned over a range of frequencies. In the method, either the transition excited by the pump light is a multiphoton transition corresponding to a frequency difference of n*ωpump, wherein n≥2; or the probe light is a set of m coherent light pulses, each coherent light pulse having a frequency ωm and a wavevector km, wherein m≥2; or both. Systems for carrying out the methods are also provided.

公开(公告)号：US20190391070A1

公开(公告)日：2019-12-26

申请号：US16446750

申请日：2019-06-20

Applicant: Wisconsin Alumni Research Foundation

Inventor： Darien James Morrow ,  Daniel David Kohler ,  John Curtis Wright

IPC: G01N21/25 ,  G01N21/63

Abstract: Methods for pump-probe spectroscopy are provided. In an embodiment, such a method comprises directing pump light having a frequency ωpump at a location in a sample to excite a transition between two quantum states of a target entity in the sample, directing probe light at the location to generate a coherent output signal having a frequency ωoutput and a wavevector koutput, and detecting the output signal as the probe light is scanned over a range of frequencies. In the method, either the transition excited by the pump light is a multiphoton transition corresponding to a frequency difference of n*ωpump, wherein n≥2; or the probe light is a set of m coherent light pulses, each coherent light pulse having a frequency ωm and a wavevector km, wherein m≥2; or both. Systems for carrying out the methods are also provided.