Results 31 to 40 of about 4,208,561 (328)

Self-mixing interference effects in tunable diode laser absorption spectroscopy [PDF]

, 2009
We report the effects of self-mixing interference on gas detection using tunable diode laser spectroscopy. For very weak feedback, the laser diode output intensity gains a sinusoidal modulation analogous to that caused by low finesse etalons in the ...
Hodgkinson, Jane, Masiyano, Dackson, Schilt, S., Tatam, Ralph P.   +3 more
core   +2 more sources

Ultra-highly sensitive dual gases detection based on photoacoustic spectroscopy by exploiting a long-wave, high-power, wide-tunable, single-longitudinal-mode solid-state laser

Light: Science & Applications
Photoacoustic spectroscopy (PAS) as a highly sensitive and selective trace gas detection technique has extremely broad application in many fields. However, the laser sources currently used in PAS limit the sensing performance. Compared to diode laser and
Shunda Qiao, Ying He, Haiyue Sun, P. Patimisco, A. Sampaolo, V. Spagnolo, Yufei Ma   +6 more
semanticscholar   +1 more source

Impact of Humidity on Quartz-Enhanced Photoacoustic Spectroscopy Based CO Detection Using a Near-IR Telecommunication Diode Laser

Sensors, 2016
A near-IR CO trace gas sensor based on quartz-enhanced photoacoustic spectroscopy (QEPAS) is evaluated using humidified nitrogen samples. Relaxation processes in the CO-N2-H2O system are investigated.
Xukun Yin, Lei Dong, Huadan Zheng, Xiaoli Liu, Hongpeng Wu, Yanfang Yang, Weiguang Ma, Lei Zhang, Wangbao Yin, Liantuan Xiao, Suotang Jia   +10 more
doaj   +1 more source

Laser Phase and Frequency Stabilization Using Atomic Coherence

, 2012
We present a novel and simple method of stabilizing the laser phase and frequency by polarization spectroscopy of an atomic vapor. In analogy to the Pound-Drever-Hall method, which uses a cavity as a memory of the laser phase, this method uses atomic ...
D. Budker, H. Metcalf, Hideyasu Tashiro, Nozomi Ohtsubo, R. Feynman, Takatoshi Aoki, W. Nagourney, Yoshio Torii   +7 more
core   +1 more source

Ultrafast electrooptic dual-comb interferometry [PDF]

, 2015
The femtosecond laser frequency comb has enabled the 21st century revolution in optical synthesis and metrology. A particularly compelling technique that relies on the broadband coherence of two laser frequency combs is dual-comb interferometry.
Duran, Vicente, Tainta, Santiago, Torres-Company, Victor   +2 more
core   +2 more sources

Enhanced sunlight driven photocatalytic activity of In2S3 nanosheets functionalized MoS2 nanoflowers heterostructures

Scientific Reports, 2021
Visible light-sensitive 2D-layered based photocatalytic systems have been proven one of the effective recent trends. We report the preparation of a 2D-layered based In2S3–MoS2 nanohybrid system through a facile hydrothermal method, capable of efficiently
Jaspal Singh, R. K. Soni
doaj   +1 more source

Electronic energy transfer in single conjugated polymer molecules revealed by phase-modulated pulse-pair controlled single molecule spectroscopy

AIP Advances, 2021
Detailed understanding of the electronic energy transfer dynamics in conjugated polymer molecules and their conformation dependence is central for improving the photophysical properties as well as the performance of devices based on conjugated polymers ...
Ruiyun Chen, Yao Li, Wenling Guan, Guofeng Zhang, Chengbing Qin, Jianyong Hu, Liantuan Xiao, Suotang Jia   +7 more
doaj   +1 more source

Doppler-free frequency modulation spectroscopy of atomic erbium in a hollow cathode discharge cell

, 2011
The erbium atomic system is a promising candidate for an atomic Bose-Einstein condensate of atoms with a non-vanishing orbital angular momentum ($L \neq 0$) of the electronic ground state.
A.S. Bell, B. Dubetsky, B. Smeets, C.C. Bradley, D. Jaksch, D. Sukachev, G. Ritt, G.C. Bjorklund, G.G. Lister, G.K. Brennen, H. Brammer, I. Danshita, J. Ulitzsch, J.E. Lawler, J.J. McClelland, J.S. Ross, L. Santos, M. Lu, M. Weitz, O. Mandel, P. Buonsante, R. Bourouis, R. Grimm, T. Salger   +23 more
core   +1 more source

Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy.

Physical Review Letters, 2018
Until recently, ground-state nuclear moments of the heaviest nuclei could only be inferred from nuclear spectroscopy, where model assumptions are required.
S. Raeder, D. Ackermann, H. Backe, R. Beerwerth, J. Berengut, M. Block, A. Borschevsky, B. Cheal, P. Chhetri, C. Düllmann, V. Dzuba, E. Eliav, J. Even, R. Ferrer, V. Flambaum, S. Fritzsche, F. Giacoppo, S. Götz, F. Heßberger, M. Huyse, U. Kaldor, O. Kaleja, J. Khuyagbaatar, P. Kunz, M. Laatiaoui, F. Lautenschläger, W. Lauth, A. Mistry, E. M. Ramirez, W. Nazarewicz, S. Porsev, M. Safronova, U. Safronova, B. Schuetrumpf, P. Duppen, T. Walther, C. Wraith, A. Yakushev   +37 more
semanticscholar   +1 more source

Cell surface interactome analysis identifies TSPAN4 as a negative regulator of PD‐L1 in melanoma

Molecular Oncology, EarlyView.
Using cell surface proximity biotinylation, we identified tetraspanin TSPAN4 within the PD‐L1 interactome of melanoma cells. TSPAN4 negatively regulates PD‐L1 expression and lateral mobility by limiting its interaction with CMTM6 and promoting PD‐L1 degradation.
Guus A. Franken, Andrea Abel Gutierrez, Imke van Rossum, Cornelia G. Spruijt, Michiel Vermeulen, Guido van Mierlo, Blanca Scheijen, Annemiek B. van Spriel   +7 more
wiley   +1 more source