Gas Phase Spectroscopy
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Author(s):  
Ryosuke Goda ◽  
Saya Kanazawa ◽  
Shiori Machida ◽  
Satoru Muramatsu ◽  
Yoshiya Inokuchi

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 3005 ◽  
Author(s):  
Dominik Walter Vogt ◽  
Angus Harvey Jones ◽  
Rainer Leonhardt

The terahertz spectrum provides tremendous opportunities for broadband gas-phase spectroscopy, as numerous molecules exhibit strong fundamental resonances in the THz frequency range. However, cutting-edge THz gas-phase spectrometer require cumbersome multi-pass gas cells to reach sufficient sensitivity for trace level gas detection. Here, we report on the first demonstration of a THz gas-phase spectrometer using a sub-wavelength thick ultrahigh-Q THz disc microresonator. Leveraging the microresonator’s ultrahigh quality factor in excess of 120,000 as well as the intrinsically large evanescent field, allows for the implementation of a very compact spectrometer without the need for complex multi-pass gas cells. Water vapour concentrations as low as 4 parts per million at atmospheric conditions have been readily detected in proof-of-concept experiments.


2020 ◽  
Vol 22 (36) ◽  
pp. 20331-20336
Author(s):  
Christina Kjær ◽  
Elisabeth Gruber ◽  
Steen Brøndsted Nielsen ◽  
Lars H. Andersen

New perspectives of light harvesting: impacts of dimerization and axial ligation on electronic transition energies of chlorophylls in vacuo.


Author(s):  
Yash Mehta ◽  
Sam Razavian ◽  
Kevin Schwarm ◽  
R. M. Spearrin ◽  
Aydin Babakhani

2019 ◽  
Vol 4 (1) ◽  
pp. 86-91 ◽  
Author(s):  
Patrice Theulé ◽  
Christian Endres ◽  
Marius Hermanns ◽  
Jean-Baptiste Bossa ◽  
Alexey Potapov

Optica ◽  
2019 ◽  
Vol 6 (12) ◽  
pp. 1449 ◽  
Author(s):  
Francis Hindle ◽  
Robin Bocquet ◽  
Anastasiia Pienkina ◽  
Arnaud Cuisset ◽  
Gaël Mouret

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