Apparatus and method for cavity-enhanced ultrafast two-dimensional spectroscopy
AssigneeThe Research Foundation for The State University of New York
InventorThomas K. Allison
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Abstract
Provided are an apparatus and method for two-dimensional spectroscopy using frequency combs and optical resonators, with the apparatus including at least one cavity and a controller for controlling generating a pump excitation using at least two frequency combs, generating a probe excitation using at least one frequency comb, and generating a resonantly enhanced signal frequency comb via a nonlinear-optical response of the sample. All frequency combs are resonant with a transverse mode of the cavity, to generate cavity-enhanced two-dimensional spectroscopy signals.
Claims18
An apparatus for two-dimensional (2D) spectroscopy, the apparatus comprising:
- at least one cavity configured to contain a sample;
- and
- a controller configured to control
- a pump excitation using at least two frequency combs resonantly enhanced in at least one transverse mode of the at least one cavity,
- a probe excitation using at least one frequency comb resonantly enhanced in at least one transverse mode of the at least one cavity, and
- generating a resonantly enhanced signal frequency comb via a nonlinear-optical response of the sample,
- wherein pump pulses and probe pulses circulate about the at least one cavity to acquire intracavity round trip phase shifts.
An apparatus for two-dimensional (2D) spectroscopy, the apparatus comprising:
- at least one cavity configured to contain a sample;
- and
- a controller configured to control
- a pump excitation using at least two frequency combs resonantly enhanced in at least one transverse mode of the at least one cavity,
- a probe excitation using at least one frequency comb resonantly enhanced in at least one transverse mode of the at least one cavity, and
- generating a resonantly enhanced signal frequency comb via a nonlinear-optical response of the sample,
- further comprising an interferometer that includes at least one acousto-optic modulator (AOM) configured to generate the at least two frequency combs of the pump excitation and the at least one frequency comb of the probe excitation.
An apparatus for two-dimensional (2D) spectroscopy, the apparatus comprising:
- at least one cavity configured to contain a sample;
- and
- a controller configured to control
- a pump excitation using at least two frequency combs resonantly enhanced in at least one transverse mode of the at least one cavity,
- a probe excitation using at least one frequency comb resonantly enhanced in at least one transverse mode of the at least one cavity, and
- generating a resonantly enhanced signal frequency comb via a nonlinear-optical response of the sample,
- wherein a combination of spatial mode discrimination, frequency discrimination, and temporal discrimination suppresses undesired signals from a 2D spectroscopy signal.
An apparatus for performing optical spectroscopy, the apparatus comprising:
- at least two cavities;
- and
- a controller configured to control
- a pump excitation using at least two frequency combs resonantly enhanced in at least one transverse mode of a pump cavity of the at least two cavities,
- a probe excitation using at least one frequency comb resonantly enhanced in at least one transverse mode of a probe cavity of the at least two cavities, and
- generating a resonantly enhanced signal frequency comb via a nonlinear-optical response of the sample,
- further comprising at least one point of overlap of the pump excitation and the probe excitation in the at least two cavities.
An apparatus for performing optical spectroscopy, the apparatus comprising:
- at least two cavities;
- and
- a controller configured to control
- a pump excitation using at least two frequency combs resonantly enhanced in at least one transverse mode of a pump cavity of the at least two cavities,
- a probe excitation using at least one frequency comb resonantly enhanced in at least one transverse mode of a probe cavity of the at least two cavities, and
- generating a resonantly enhanced signal frequency comb via a nonlinear-optical response of the sample,
- wherein the at least two cavities provide a non-collinear geometry.
A method for performing two-dimensional (2D) spectroscopy, comprising:
- generating a pump excitation using at least two frequency combs;
- generating a probe excitation using at least one frequency comb;
- and
- generating resonantly enhanced signal frequency combs via a nonlinear optical response of a sample,
- wherein the at least two pump frequency combs and the at least one probe frequency are resonant with at least one transverse mode of at least one cavity in which a sample is positioned for performing 2D spectroscopy.
Dependencies are inferred from the claim text.