Frequency-domain pump-probe microscopic imaging using intensity-modulated laser diodes

1999 ◽  
Author(s):  
Christof Buehler ◽  
Chen-Yuan Dong ◽  
Peter T. C. So ◽  
Todd E. French ◽  
Enrico Gratton
Keyword(s):  
Frequency Domain ◽  
Laser Diodes ◽  
Pump Probe ◽  
Microscopic Imaging ◽  
Intensity Modulated

scholarly journals Implementation of intensity-modulated laser diodes in time-resolved, pump–probe fluorescence microscopy

2001 ◽  
Vol 40 (7) ◽  
pp. 1109 ◽  
Author(s):  
Chen-Yuan Dong ◽  
Christof Buehler ◽  
Peter T. C. So ◽  
Todd French ◽  
Enrico Gratton
Keyword(s):  
Fluorescence Microscopy ◽  
Laser Diodes ◽  
Time Resolved ◽  
Pump Probe ◽  
Intensity Modulated

scholarly journals Lifting restrictions on coherence loss when characterizing non-transparent hypersonic phononic crystals

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Konrad Rolle ◽  
Dmytro Yaremkevich ◽  
Alexey V. Scherbakov ◽  
Manfred Bayer ◽  
George Fytas
Keyword(s):  
Frequency Domain ◽  
Hybrid Approach ◽  
Three Dimensional ◽  
Phononic Crystals ◽  
Hybrid Technique ◽  
Detection Mechanism ◽  
Pump Probe ◽  
Fabry Perot ◽  
Multilayer Stacks ◽  
Deposition Techniques

AbstractHypersonic phononic bandgap structures confine acoustic vibrations whose wavelength is commensurate with that of light, and have been studied using either time- or frequency-domain optical spectroscopy. Pulsed pump-probe lasers are the preferred instruments for characterizing periodic multilayer stacks from common vacuum deposition techniques, but the detection mechanism requires the injected sound wave to maintain coherence during propagation. Beyond acoustic Bragg mirrors, frequency-domain studies using a tandem Fabry–Perot interferometer (TFPI) find dispersions of two- and three-dimensional phononic crystals (PnCs) even for highly disordered samples, but with the caveat that PnCs must be transparent. Here, we demonstrate a hybrid technique for overcoming the limitations that time- and frequency-domain approaches exhibit separately. Accordingly, we inject coherent phonons into a non-transparent PnC using a pulsed laser and acquire the acoustic transmission spectrum on a TFPI, where pumped appear alongside spontaneously excited (i.e. incoherent) phonons. Choosing a metallic Bragg mirror for illustration, we determine the bandgap and compare with conventional time-domain spectroscopy, finding resolution of the hybrid approach to match that of a state-of-the-art asynchronous optical sampling setup. Thus, the hybrid pump–probe technique retains key performance features of the established one and going forward will likely be preferred for disordered samples.

scholarly journals Sub-diffraction resolution pump-probe microscopy with shot-noise limited sensitivity using laser diodes

2014 ◽  
Vol 22 (8) ◽  
pp. 9024 ◽  
Author(s):  
Jun Miyazaki ◽  
Hiromichi Tsurui ◽  
Akiko Hayashi-Takagi ◽  
Haruo Kasai ◽  
Takayoshi Kobayashi
Keyword(s):  
Shot Noise ◽  
Laser Diodes ◽  
Pump Probe ◽  
Probe Microscopy ◽  
Limited Sensitivity
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