scholarly journals Эпитаксиальные напряжения в фотопроводящем слое InGaAs для THz-антенн

2017 ◽  
Vol 43 (22) ◽  
pp. 48
Author(s):  
Д.И Хусяинов ◽  
А.М. Буряков ◽  
В.Р. Билык ◽  
Е.Д. Мишина ◽  
Д.С. Пономарев ◽  
...  
Keyword(s):  
Optical Pump ◽  
Pump Probe

Методами оптического зондирования при фемтосекундной лазерной накачке (optical pump-probe) и терагерцевой спектроскопии во временной области исследовано влияние эпитаксиальных напряжений на динамику неравновесных носителей заряда, а также спектр терагерцевого излучения в пленках InyGa1-yAs. Продемонстрировано снижение времени жизни неравновесных носителей заряда и увеличение ширины спектра терагерцевого излучения для пленки InyGa1-yAs с большим механическим напряжением. DOI: 10.21883/PJTF.2017.22.45260.16958

Pump-Probe Measurements Using Silicon Nanocrystal Waveguides

2003 ◽  
Vol 770 ◽  
Author(s):  
Nathanael Smith ◽  
Max J. Lederer ◽  
Marek Samoc ◽  
Barry Luther-Davies ◽  
Robert G. Elliman
Keyword(s):  
Probe Beam ◽  
Time Resolution ◽  
Pump Beam ◽  
Silicon Nanocrystals ◽  
Continuous Wave ◽  
Optical Gain ◽  
Optical Pump ◽  
Time Resolved ◽  
Pump Probe ◽  
Probe Measurements

AbstractOptical pump-probe measurements were performed on planar slab waveguides containing silicon nanocrystals in an attempt to measure optical gain from photo-excited silicon nanocrystals. Two experiments were performed, one with a continuous-wave probe beam and a pulsed pump beam, giving a time resolution of approximately 25 ns, and the other with a pulsed pump and probe beam, giving a time resolution of approximately 10 ps. In both cases the intensity of the probe beam was found to be attenuated by the pump beam, with the attenuation increasing monotonically with increasing pump power. Time-resolved measurements using the first experimental arrangement showed that the probe signal recovered its initial intensity on a time scale of 45-70 μs, a value comparable to the exciton lifetime in Si nanocrystals. These data are shown to be consistent with an induced absorption process such as confined carrier absorption. No evidence for optical gain was observed.

Gilbert Damping for Various Ni80Fe20Thin Films Investigated Using All-Optical Pump–Probe Detection and Ferromagnetic Resonance

2008 ◽  
Vol 1 ◽  
pp. 121301 ◽  
Author(s):  
Shigemi Mizukami ◽  
Hiroyuki Abe ◽  
Daisuke Watanabe ◽  
Mikihiko Oogane ◽  
Yasuo Ando ◽  
...  
Keyword(s):  
Ferromagnetic Resonance ◽  
Optical Pump ◽  
Gilbert Damping ◽  
Pump Probe ◽  
Probe Detection ◽  
All Optical

Thermal Transport From Gold Nanorod to Solvent, an Investigation of Ligand Effects by Ultrafast Laser Spectroscopy

2008 ◽  
Author(s):  
Joshua Alper ◽  
Aaron Schmidt ◽  
Kimberly Hamad-Schifferli
Keyword(s):  
Heat Transfer ◽  
Thermal Properties ◽  
Gold Nanorods ◽  
Thermal Transport ◽  
Ultrafast Laser ◽  
Ultrafast Laser Spectroscopy ◽  
Optical Pump ◽  
Thermal Interface ◽  
Pump Probe ◽  
Ligand Effects

To facilitate analysis of nanoscale heat transfer in nanoparticle systems the thermal properties of ligand layers must be understood. To this end, we use an optical pump-probe technique to study the thermal transport across ligands on gold nanorods and into the solvent. We find that varying properties of the ligand can have large impacts on the thermal decay of a nanorod after exposure to a laser pulse. By raising the concentration of free CTAB from 1 mM and 10 mM in solutions, the CTAB layer’s effective thermal interface conductance increases three fold. The transition occurs near the CTAB critical micelle concentration. Similar results are found for other ligand layers.

Ultrafast dynamics in pentacene and tetracene probed using optical pump-probe spectroscopy

2004 ◽  
Author(s):  
Verner K. Thorsmølle ◽  
R D. Averitt ◽  
J Demsar ◽  
X Chi ◽  
S Tretiak ◽  
...  
Keyword(s):  
Ultrafast Dynamics ◽  
Optical Pump ◽  
Pump Probe ◽  
Probe Spectroscopy

Contrasting hydration dynamics in DME and DMSO aqueous solutions: A combined optical pump-probe and GHz-THz dielectric relaxation investigation

2019 ◽  
Vol 290 ◽  
pp. 111194 ◽  
Author(s):  
Debasish Das Mahanta ◽  
Sk Imadul Islam ◽  
Samiran Choudhury ◽  
Dipak Kumar Das ◽  
Rajib Kumar Mitra ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Dielectric Relaxation ◽  
Optical Pump ◽  
Pump Probe ◽  
Hydration Dynamics

scholarly journals Time-resolved x-ray/optical pump-probe simulations on N2 molecules

2019 ◽  
Vol 6 (2) ◽  
pp. 024101
Author(s):  
Athiya Mahmud Hanna ◽  
Oriol Vendrell ◽  
Robin Santra
Keyword(s):  
Optical Pump ◽  
Time Resolved ◽  
Pump Probe ◽  
X Ray

How to realize ultimate spatial and temporal resolutions by laser-combined scanning tunneling microscopy?

2005 ◽  
Vol 901 ◽  
Author(s):  
Hidemi Shigekawa ◽  
Osamu Takeuchi ◽  
Masahiro Aoyama ◽  
Yasuhiko Terada ◽  
Hiroyuki Kondo ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Pulse Laser ◽  
Electronic Structures ◽  
Femtosecond Pulse ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Optical Pump ◽  
Pump Probe ◽  
Probe Technique ◽  
Femtosecond Pulse Laser

AbstractBy combining scanning tunneling microscopy (STM) and the optical pump-probe technique using a femtosecond pulse laser, we have developed a new microscopy, shaken pulse-pair-excited STM (SPPX-STM), that enables us to observe the dynamics of electronic structures with the ultimate spatial and temporal resolutions.

scholarly journals Thermoreflectance of metal transducers for optical pump-probe studies of thermal properties

2012 ◽  
Vol 20 (27) ◽  
pp. 28829 ◽  
Author(s):  
R. B. Wilson ◽  
Brent A. Apgar ◽  
Lane W. Martin ◽  
David G. Cahill
Keyword(s):  
Thermal Properties ◽  
Optical Pump ◽  
Pump Probe
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