Time‐resolved Raman spectroscopy of polystyrene under laser driven shock compression

Rastogi, Vinay; Chaurasia, S.; Rao, U. R. K.; Sijoy, C. D.; Mishra, Vinayak; Kumar, Manmohan; Chaturvedi, S.; Deo, M. N.

doi:10.1002/jrs.5166

Cited by 11 publications

(16 citation statements)

References 52 publications

(117 reference statements)

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“…The core layer is made up of polystyrene ((C 8 H 8 ) n )-hosted dye molecules, as shown in Fig. 1(f), where the Raman spectrum matches correspondingly well with previously reported spectra in other literature [47,48]. Figure 2(a) shows the schematic of the experimental setup for UV-based UWOC using the large-area scintillating-fiber-based photoreceiver at the receiver end.…”

Section: Methodssupporting

confidence: 80%

Ultraviolet-to-blue color-converting scintillating-fibers photoreceiver for 375-nm laser-based underwater wireless optical communication

et al. 2019

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Underwater wireless optical communication (UWOC) can offer reliable and secure connectivity for enabling future internet-of-underwater-things (IoUT), owing to its unlicensed spectrum and high transmission speed. However, a critical bottleneck lies in the strict requirement of pointing, acquisition, and tracking (PAT), for effective recovery of modulated optical signals at the receiver end. A large-area, high bandwidth, and wide-angle-of-view photoreceiver is therefore crucial for establishing a high-speed yet reliable communication link under non-directional pointing in a turbulent underwater environment. In this work, we demonstrated a large-area, of up to a few tens of cm 2 , photoreceiver design based on ultraviolet(UV)-to-blue color-converting plastic scintillating fibers, and yet offering high 3-dB bandwidth of up to 86.13 MHz. Tapping on the large modulation bandwidth, we demonstrated a high data rate of 250 Mbps at bit-error ratio (BER) of 2.2 × 10 −3 using non-return-to-zero on-off keying (NRZ-OOK) pseudorandom binary sequence (PRBS) 2 10-1 data stream, a 375-nm laser-based communication link over the 1.15-m water channel. This proof-of-concept demonstration opens the pathway for revolutionizing the photodetection scheme in UWOC, and for non-line-of-sight (NLOS) free-space optical communication.

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Section: Methodssupporting

confidence: 80%

Ultraviolet-to-blue color-converting scintillating-fibers photoreceiver for 375-nm laser-based underwater wireless optical communication

et al. 2019

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“…At a delay time of 70 ns, shock has almost reached up to the end of the sample. The shock velocity inside PMMA was calculated by using the equation U s = rÁt, [43,44] where U s is the shock velocity, r is the slope of the plot of the intensity ratio of Raman mode of material from shocked volume to total volume against time delay, and t is the thickness of the PMMA sheet. The intensity ratio r was extracted by plotting the ratio of shocked signal to the total signal with respect to delay times as shown in Figure 5b.…”

Section: Shock Velocity Calculation In Pmma Using Experimental Measmentioning

confidence: 99%

Raman spectroscopy of poly (methyl methacrylate) under laser shock and static compression

Chaurasia

Rao

Mishra

et al. 2020

J Raman Spectroscopy

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Time-resolved Raman spectroscopy for visualizing molecular fingerprint snapshots at nanosecond time scale is a useful tool for detailed understanding of in situ shock behaviour of materials. This technique was applied to study the changes in molecular vibrations of poly (methyl methacrylate) (PMMA) under laser driven shock compression up to~1.9 GPa in a confinement geometry. A layered target configuration is used to enhance the shock pressure. The vibrational modes are measured as a function of dynamic shock and static compression. The Grüneisen parameters and bond anharmonicities in PMMA are determined using compression behaviour of Raman modes. The deduced shock velocity (~3.5 ± 0.4 km/s) in PMMA based on the time evolution of shocked Raman mode at 1.9 GPa is in agreement with the one calculated (~3.7 km/s) from 1-D radiation hydrodynamic simulations. A comparative study on shock experiment and static high pressure Raman spectroscopic measurements is done. Static pressure measurement up to~16 GPa show rapid blue shifting of C-H stretching modes. K E Y W O R D SPMMA, laser shock, confinement geometry, Raman spectroscopy, Raman shift, static experiment, diamond anvil cell (DAC)

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“…The shock pressure estimated in the polystyrene sample was 2 GPa, and the temporal and wavenumber resolutions in these experiments were 3 ns and 3 cm ‐1 , respectively. The shocked polystyrene showed a blue shift of 5 and 7 cm −1 for the 1,004 (CCC ring bending mode ν 12) and 1,606 cm −1 (CC ring stretching mode ν 8a), respectively …”

Section: Solid State Studiesmentioning

confidence: 99%

Recent advances in linear and nonlinear Raman spectroscopy. Part XII

Nafie

2018

J Raman Spectroscopy

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This annual review is an overview of advances in the field of Raman spectroscopy as found in papers published in the previous calendar year in the Journal of Raman Spectroscopy (JRS), as well as in trends over the past decade across journals that have published papers important to the field of Raman spectroscopy. This information is gleaned from statistical data on article counts obtained from the Clarivate Analytic's Web of Science Core Collection by year and by subfield of Raman spectroscopy. Additional information is gleaned from presentations at the XXVI International Conference on Raman Spectroscopy (ICORS 2018) in Jeju Island, Korea in August 2018, and contributions on Raman scattering at SCIX 2018, organized by the Federation of Analytical Chemistry and Spectroscopy Societies (FACSS) in Atlanta, Georgia, USA in October 2018. Coverage is also provided for topics from the European Conference on Nonlinear Optical Spetroscopy (ECONOS 2018) held in April in Milan, Italy and GeoRaman 2018 in Catania, Italy in June. Finally, papers published in JRS in 2017 are highlighted and arranged by topics at the frontier of Raman spectroscopy. On the basis of this survey information, it is clear that Raman spectroscopy continues as in recent years as a rapidly expanding field of research across a wide range of novel disciplines and applications that provide sensitive photonic information of matter at the molecular level.

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Time‐resolved Raman spectroscopy of polystyrene under laser driven shock compression

Cited by 11 publications

References 52 publications

Ultraviolet-to-blue color-converting scintillating-fibers photoreceiver for 375-nm laser-based underwater wireless optical communication

Ultraviolet-to-blue color-converting scintillating-fibers photoreceiver for 375-nm laser-based underwater wireless optical communication

Raman spectroscopy of poly (methyl methacrylate) under laser shock and static compression

Recent advances in linear and nonlinear Raman spectroscopy. Part XII

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