Picosecond and Femtosecond Spectroscopic Instrumentation for Ultrafast Spectroscopy and Lasers

A brief overview is presented on ultrafast spectroscopy and imaging of photochemical reactions by highlighting several experimental studies reported in the last five years.

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Deciphering the Relaxation Mechanism of Red-Emitting Carbon Dots Using Ultrafast Spectroscopy and Global Target Analysis

The Journal of Physical Chemistry Letters ◽

10.1021/acs.jpclett.1c02116 ◽

2021 ◽

Vol 12 (33) ◽

pp. 8080-8087 ◽

Cited By ~ 1

Author(s):

Srijon Ghosh ◽

Arnab Ghosh ◽

Goutam Ghosh ◽

Kritiman Marjit ◽

Amitava Patra

Keyword(s):

Carbon Dots ◽

Ultrafast Spectroscopy ◽

Relaxation Mechanism ◽

Target Analysis ◽

Global Target

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Collinear pump probe experiment, novel approach to ultrafast spectroscopy

Applied Physics B ◽

10.1007/s003400050687 ◽

1999 ◽

Vol 68 (4) ◽

pp. 689-692 ◽

Cited By ~ 1

Author(s):

B. Bousquet ◽

L. Canioni ◽

J. Plantard ◽

L. Sarger

Keyword(s):

Ultrafast Spectroscopy ◽

Pump Probe ◽

Novel Approach ◽

Probe Experiment ◽

Pump Probe Experiment

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Raman spectroscopic study of the photoprotection of extremophilic microbes against ultraviolet radiation

International Journal of Astrobiology ◽

10.1017/s147355040600348x ◽

2006 ◽

Vol 5 (4) ◽

pp. 313-318 ◽

Cited By ~ 13

Author(s):

H.G.M. Edwards ◽

R. Moeller ◽

S.E. Jorge Villar ◽

G. Horneck ◽

E. Stackebrandt

Keyword(s):

Deinococcus Radiodurans ◽

Survival Strategies ◽

Raman Spectroscopic ◽

Spectroscopic Analyses ◽

Terrestrial Habitats ◽

Life Context ◽

Wavelength Radiation ◽

Spectroscopic Instrumentation ◽

Natronomonas Pharaonis ◽

Uva Radiation

Extremophiles use a range of pigments for protection against low-wavelength radiation in exposed terrestrial habitats and photoaccessory materials are synthesized for the effective harnessing of photosynthetically active radiation. Raman spectroscopy has been demonstrated to be a useful probe for information on the survival strategies employed by extremophilic bacteria through the identification of key biomolecular signatures of the suite of protective chemicals synthesized by the organisms in stressed environments. Raman spectroscopic analyses of Bacillus spp. spores, Bacillus atrophaeus (DSM 675: deep red) and Bacillus subtilis (DSM 5611: light grey and DSM 7264: dark grey), Deinococcus radiodurans (pink) and Natronomonas pharaonis (red), of visually different pigmentation showed the presence of different carotenoids and other protectant biomolecules, which assist microorganisms against UVA radiation. The implications for the survival of extremophilic microbes in extraterrestrial habitats and for the detection of the protectant biomolecules by remote, robotic Raman spectroscopic instrumentation in an astrobiological search for life context are discussed.

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