Results 81 to 90 of about 693,236 (350)

Direct optical observation of walls and disclination effects in active photonic devices

, 2009
Liquid crystal tunable Bragg Gratings defined in planar substrates via a laser patterning technique exhibit complex wavelength tuning. This tuning displays threshold points and hysteresis. These tuning features are shown to be a manifestation of physical
Adikan, F.R.M., Dyadyusha, A., Gates, J.C., Gawith, C.B.E., Kaczmarek, M., Major, Huw E., Smith, P.G.R., Snow, B.D.   +7 more
core   +1 more source

The Berkeley tunable far infrared laser spectrometers [PDF]

, 1991
A detailed description is presented for a tunable far infrared laser spectrometer based on frequency mixing of an optically pumped molecular gas laser with tunable microwave radiation in a Schottky point contact diode.
Blake, G. A., Busarow, K. L., Cohen, R. C., Gwo, D.-H., Laughlin, K. B., Saykally, R. J., Schmuttenmaer, C. A., Steyert, D. W.   +7 more
core   +1 more source

Size-tunable rhodium nanostructures for wavelength-tunable ultraviolet plasmonics

Nanoscale Horizons, 2016
The localized surface plasmon resonance of Rh nanocubes red-shifts in the UV region with increasing size.
Zhang, Xiao, Li, Pan, Barreda Gómez, Ángela Inmaculada, Gutiérrez Vela, Yael, González Fernández, Francisco, Moreno Gracia, Fernando, Everitt, Henry O., Liu, Jie   +7 more
openaire   +3 more sources

Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres

Advanced Engineering Materials, EarlyView.
This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann, René Gustus, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +3 more
wiley   +1 more source

Highly sensitive photoacoustic acetylene detection based on differential photoacoustic cell with retro-reflection-cavity

Photoacoustics, 2023
In this paper, a highly sensitive photoacoustic spectroscopy (PAS) sensor based on retro-reflection-cavity-enhanced differential photoacoustic cell (DPAC) is demonstrated for the first time. Acetylene (C2H2) was selected as the analyte.
Chu Zhang, Shunda Qiao, Yufei Ma
doaj   +1 more source

A broadband and high throughput single-monochromator Raman spectrometer; application for single-wall carbon nanotubes

, 2011
We present a high sensitivity single-monochromator Raman spectrometer which allows operation with a tunable laser source. The instrument is based on the modification of a commercial Raman spectrometer; such instruments operate with holographic Rayleigh ...
Friedrich, Alexander, Fábián, Gábor, Kramberger, Christian, Pichler, Thomas, Simon, Ferenc   +4 more
core   +1 more source

Demonstration of a microelectromechanical tunable F-P cavity based on graphene-bonded fiber devices [PDF]

, 2019
Taking advantage of the high thermal conductivity of graphene, this paper demonstrates a microelectromechanical (MEM) tunable Fabry-Perot (F-P) cavity, based on a graphene-bonded fiber device (GFD) which acts as a microheater.
Balandin, Balandin, Bao, Bolotin, Bonaccorso, Brambilla, Brambilla, Bruland, Chen, Chen, Cheng Li, Drachenberg, Du, Fei Xu, Geim, Ghosh, Jin-Hui Chen, Kang, Kenneth T. V. Grattan, Kou, Kou, Li, Lin, Liu, Lou, Mavoori, Nika, Novoselov, Prasher, Sadeghi, Shiue, Sidorov, Subrina, Sui, Sun, Tong Sun, Wang, Ye Chen, Yokouchi, Yu, Yu, Zheng, Zhu Zheng   +42 more
core   +1 more source

Additive Gaussian Process Regression for Predictive Design of High‐Performance, Printable Silicones

Advanced Engineering Materials, EarlyView.
A chemistry‐aware design framework for tuning printable polydimethylsiloxane (PDMS) for vat photopolymerization (VPP) is developed using additive Gaussian process (GP) modeling. Polymer network mechanics informs variable groupings, feasible formulation constraints, and interaction variables.
Roxana Carbonell, Martha Leach, Hongtao Song, Carolyn Seepersad   +3 more
wiley   +1 more source

Numerical simulation of Ne-like Ar plasma dynamics and laser beam characteristics of 46.9 nm laser excited by capillary discharge

AIP Advances, 2020
In this work, we performed computer modeling of high electrical discharge in an Ar filled alumina capillary in order to investigate the parameters of the discharge system that may lead to achieve an intense laser beam.
Muhammad Usman Khan, Yongpeng Zhao, Dongdi Zhao, Huaiyu Cui, Ziyue Cao, Bo An, Feifei Zhang   +6 more
doaj   +1 more source

Tunable asymmetric reflectance in silver films near the percolation threshold

, 2011
We report on the optical characterization of semicontinuous nanostructured silver films exhibiting tunable optical reflectance asymmetries. The films are obtained using a multi-step process, where a nanocrystalline silver film is first chemically ...
Aiqing Chen, Bruggeman D., Kard P. G., Miriam Deutsch   +3 more
core   +1 more source