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Rapid-Scan Nonlinear Time-Resolved Spectroscopy over Arbitrary Delay Intervals
- 超快科学（英文） 2023年3卷第6期
- Affiliations：
a Photonics Institute, TU Wien, Vienna, Austria. b Department of Physics,ETH Zurich, Zurich,Switzerland. c Istituto di Fotonica e Nanotecnologie-CNR, Piazza Leonardo da Vinci 32, 20133Milano, Italy. d Light Conversion Ltd., Vilnius, Lithuania. e Dipartimento di Fisica, Politecnico di Milano,Piazza Leonardo da Vinci 32, 20133 Milano, Italy. f Center for Physical Sciences & Technology,Savanoriu Ave. 231 LT,Vilnius,Lithuania,02300
- Author bio：
- Funds：
DOI：10.34133/ultrafastscience.0027
中图分类号：纸质出版日期：2023，
- Accepted：
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Tobias Flöry, Vinzenz Stummer, Justinas Pupeikis, Benjamin Willenberg, Alexander Nussbaum-Lapping, Edgar Kaksis, Franco V. A. Camargo, Martynas Barkauskas, Christopher R. Phillips, Ursula Keller, Giulio Cerullo, Audrius Pugžlys, Andrius Baltuška. 2023: Rapid-Scan Nonlinear Time-Resolved Spectroscopy over Arbitrary Delay Intervals. 超快科学, Vol 3(6).
Tobias Flöry, Vinzenz Stummer, Justinas Pupeikis, Benjamin Willenberg, Alexander Nussbaum-Lapping, Edgar Kaksis, Franco V. A. Camargo, Martynas Barkauskas, Christopher R. Phillips, Ursula Keller, Giulio Cerullo, Audrius Pugžlys, Andrius Baltuška. 2023: Rapid-Scan Nonlinear Time-Resolved Spectroscopy over Arbitrary Delay Intervals. Ultrafast Science, Vol 3(6).
Tobias Flöry, Vinzenz Stummer, Justinas Pupeikis, Benjamin Willenberg, Alexander Nussbaum-Lapping, Edgar Kaksis, Franco V. A. Camargo, Martynas Barkauskas, Christopher R. Phillips, Ursula Keller, Giulio Cerullo, Audrius Pugžlys, Andrius Baltuška. 2023: Rapid-Scan Nonlinear Time-Resolved Spectroscopy over Arbitrary Delay Intervals. 超快科学, Vol 3(6). DOI： 10.34133/ultrafastscience.0027
Tobias Flöry, Vinzenz Stummer, Justinas Pupeikis, Benjamin Willenberg, Alexander Nussbaum-Lapping, Edgar Kaksis, Franco V. A. Camargo, Martynas Barkauskas, Christopher R. Phillips, Ursula Keller, Giulio Cerullo, Audrius Pugžlys, Andrius Baltuška. 2023: Rapid-Scan Nonlinear Time-Resolved Spectroscopy over Arbitrary Delay Intervals. Ultrafast Science, Vol 3(6). DOI： 10.34133/ultrafastscience.0027
摘要
Femtosecond dual-comb lasers have revolutionized linear Fourier-domain spectroscopy by offering a rapid motion-free
precise
and accurate measurement mode with easy registration of the combs beat note in the radio frequency domain. Extensions of this technique already found application for nonlinear time-resolved spectroscopy within the energy limit available from sources operating at the full oscillator repetition rate. Here
we present a technique based on time filtering of femtosecond frequency combs by pulse gating in a laser amplifier. This gives the required boost to the pulse energy and provides the flexibility to engineer pairs of arbitrarily delayed wavelength-tunable pulses for pump–probe techniques. Using a dual-channel millijoule amplifier
we demonstrate programmable generation of both extremely short
fs
and extremely long (>ns) interpulse delays. A predetermined arbitrarily chosen interpulse delay can be directly realized in each successive amplifier shot
eliminating the massive waiting time required to alter the delay setting by means of an optomechanical line or an asynchronous scan of 2 free-running oscillators. We confirm the versatility of this delay generation method by measuring χ(2) cross-correlation and χ(3) multicomponent population recovery kinetics.
Abstract
Femtosecond dual-comb lasers have revolutionized linear Fourier-domain spectroscopy by offering a rapid motion-free
precise
and accurate measurement mode with easy registration of the combs beat note in the radio frequency domain. Extensions of this technique already found application for nonlinear time-resolved spectroscopy within the energy limit available from sources operating at the full oscillator repetition rate. Here
we present a technique based on time filtering of femtosecond frequency combs by pulse gating in a laser amplifier. This gives the required boost to the pulse energy and provides the flexibility to engineer pairs of arbitrarily delayed wavelength-tunable pulses for pump–probe techniques. Using a dual-channel millijoule amplifier
we demonstrate programmable generation of both extremely short
fs
and extremely long (>ns) interpulse delays. A predetermined arbitrarily chosen interpulse delay can be directly realized in each successive amplifier shot
eliminating the massive waiting time required to alter the delay setting by means of an optomechanical line or an asynchronous scan of 2 free-running oscillators. We confirm the versatility of this delay generation method by measuring χ(2) cross-correlation and χ(3) multicomponent population recovery kinetics.
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