Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Allison, Thomas K."'
Autor:
Mehmood, Arshad, Silfies, Myles C., Durden, Andrew S., Allison, Thomas K., Levine, Benjamin G.
Transient absorption spectroscopy (TAS) is among the most common ultrafast photochemical experiments, but its interpretation remains challenging. In this work, we present an efficient and robust method for simulating TAS signals from first principles
Externí odkaz:
http://arxiv.org/abs/2404.16568
Autor:
Bakalis, Jin, Chernov, Sergii, Li, Ziling, Kunin, Alice, Withers, Zachary H., Cheng, Shuyu, Adler, Alexander, Zhao, Peng, Corder, Christopher, White, Michael G., Schönhense, Gerd, Du, Xu, Kawkami, Roland, Allison, Thomas K.
Publikováno v:
Nano Lett. 24, 9353 (2024)
The unique optical properties of graphene, with broadband absorption and ultrafast response, make it a critical component of optoelectronic and spintronic devices. Using time-resolved momentum microscopy with high data rate and high dynamic range, we
Externí odkaz:
http://arxiv.org/abs/2402.13205
Autor:
Silfies, Myles C., Mehmood, Arshad, Kowzan, Grzegorz, Hohenstein, Edward G., Levine, Benjamin G., Allison, Thomas K.
Publikováno v:
J. Chem. Phys. 159, 104304 (2023)
Salicylidenaniline (SA) is an archetypal system for excited-state intramolecular proton transfer (ESIPT) in non-planar systems. Multiple channels for relaxation involving both the keto and enol forms have been proposed after excitation to S$_1$ with
Externí odkaz:
http://arxiv.org/abs/2306.05645
Autor:
Kowzan, Grzegorz, Allison, Thomas K.
Publikováno v:
J. Phys. Chem. Lett. 13, 11650 (2022)
Recent advancements in infrared frequency combs will enable recording of coherent two-dimensional infrared spectra of gas-phase molecules with rotational resolution (RR2DIR). We describe how RR2DIR spectra can be controlled with polarization to enhan
Externí odkaz:
http://arxiv.org/abs/2206.10492
Autor:
Kowzan, Grzegorz, Allison, Thomas K.
Publikováno v:
Phys. Rev. A 106, 042819 (2022)
Two-dimensional infrared (2DIR) spectroscopy is widely used to study molecular dynamics but it is typically restricted to solid and liquid phase samples and modest spectral resolution. Only recently, its potential to study gas-phase dynamics is begin
Externí odkaz:
http://arxiv.org/abs/2206.10488
Autor:
Kunin, Alice, Chernov, Sergey, Bakalis, Jin, Li, Ziling, Cheng, Shuyu, Withers, Zachary H., White, Michael G., Schönhense, Gerd, Du, Xu, Kawakami, Roland K., Allison, Thomas K.
Publikováno v:
Phys. Rev. Lett. 130, 046202 (2023)
Coupling between exciton states across the Brillouin zone in monolayer transition metal dichalcogenides can lead to ultrafast valley depolarization. Using time- and angle-resolved photoemission, we present momentum- and energy-resolved measurements o
Externí odkaz:
http://arxiv.org/abs/2203.02419
Publikováno v:
Phys. Chem. Chem. Phys. 23, 9743 (2021)
Broadband ultrafast optical spectroscopy methods, such as transient absorption spectroscopy and 2D spectroscopy, are widely used to study molecular dynamics. However, these techniques are typically restricted to optically thick samples, such as solid
Externí odkaz:
http://arxiv.org/abs/2102.04981
Autor:
Rutledge, Jay, Catanese, Anthony, Hickstein, Daniel D., Diddams, Scott A., Allison, Thomas K., Kowligy, Abijith S.
High-harmonic generation (HHG) provides short-wavelength light that is useful for precision spectroscopy and probing ultrafast dynamics. We report efficient, phase-coherent harmonic generation up to 9th-order (333 nm) in chirped periodically poled li
Externí odkaz:
http://arxiv.org/abs/2102.04670
Autor:
Silfies, Myles C., Kowzan, Grzegorz, Chen, Yuning, Lewis, Neomi, Hou, Ryan, Baehre, Robin, Gross, Tobias, Allison, Thomas K.
Publikováno v:
Opt. Lett. 45, 2123 (2020)
We describe the cavity-enhancement of frequency combs over a wide tuning range of 450-700 nm (> 7900 cm$^{-1}$), covering nearly the entire visible spectrum. Tunable visible frequency combs from a synchronously-pumped optical parametric oscillator ar
Externí odkaz:
http://arxiv.org/abs/2001.10680
Autor:
Catanese, Anthony, Rutledge, Jay, Silfies, Myles, Li, Xinlong, Timmers, Henry, Kowligy, Abijith S., Lind, Alex, Diddams, Scott A., Allison, Thomas K.
Publikováno v:
Opt. Lett. 45, 1248 (2020)
We report on the development of a high-power mid-infrared frequency comb with 100 MHz repetition rate and 100 fs pulse duration. Difference frequency generation is realized between two branches derived from an Er:fiber comb, amplified separately in Y
Externí odkaz:
http://arxiv.org/abs/1912.03525