High-sensitivity pump-probe spectroscopy with a dual-comb laser and a PM-Andi supercontinuum

被引：2

作者：

Gruber, Christoph ^{[1
]}

Pupeikis, Justinas ^{[1
]}

Camenzind, Sandro l. ^{[1
]}

Willenberg, Benjamin ^{[1
]}

Camargo, Franco v. a. ^{[2
]}

Lang, Lukas ^{[1
]}

Hamm, Peter ^{[3
]}

Rampur, Anupamaa ^{[4
]}

Heidt, Alexander ^{[4
]}

Phillips, Christopher r. ^{[1
]}

Cerullo, Giulio ^{[2
,5
]}

Keller, Ursula ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Dept Phys, CH-8093 Zurich, Switzerland

[2] CNR, Ist Foton & Nanotecnol, I-20133 Milan, Italy

[3] Univ Zurich, Dept Chem, CH-8057 Zurich, Switzerland

[4] Univ Bern, Inst Appl Phys, CH-3012 Bern, Switzerland

[5] Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy

来源：

OPTICS LETTERS | 2024年 / 49卷 / 22期

基金：

欧洲研究理事会;

关键词：

SOLAR-CELLS; DYNAMICS;

D O I：

10.1364/OL.538105

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Amplifier-based pump-probe systems, while versatile, often suffer from complexity and low measurement speeds, especially when probing samples require low excitation fluences. To address these limitations, we introduce a pump-probe system that leverages a 60-MHz single-cavity dual-comb oscillator and an ultra-low noise supercontinuum. The setup can operate in equivalent time sampling or in programmable optical delay generation modes. We employ this system to study the wavelength-dependent excited-state dynamics of the non-fullerene electron acceptor Y6, a compound of interest in solar cell development, with excitation fluences as low as 1 nJ/cm2, well below the onset of nonlinear exciton annihilation effects. Our measurements reach a shot-noise limited sensitivity in differential transmission of 3.4<middle dot>10-7. The results demonstrate the system's potential to advance the field of ultrafast spectroscopy.

引用

页码：6445 / 6448

页数：4

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