Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Peter R. Buerki"'
Autor:
Peter R. Buerki, Samuel Leutwyler
Publikováno v:
CHIMIA, Vol 45, Iss 1-2 (1991)
Diamond powders with grain diameters up to 0.3 ?m were obtained by CO2-laser induced decomposition of C2H4 and mixtures of C2H4/H2/SiH4 at low pressures and temperatures in a gas-flow reactor. Solid products were produced in a yellow-to-orange colou
Externí odkaz:
https://doaj.org/article/e5dc361c4056426d815a36207e4c977d
Publikováno v:
Applied Physics B. 107:275-283
A quartz-enhanced photoacoustic spectroscopy (QEPAS) based sensor for carbon monoxide detection at ppbv levels was developed with a 4.65 μm external-cavity quantum cascade laser operating both in continuous wave (cw) and pulsed modes. A 23-fold enha
Publikováno v:
Applied Physics B. 100:173-180
A quartz enhanced photoacoustic spectroscopy sensor designed for fast response was used in combina- tion with a pulsed external cavity quantum cascade laser to rapidly acquire gas absorption data over the 1196- 1281 cm −1 spectral range. The system
Publikováno v:
Gems & Gemology. 36:128-137
Publikováno v:
Diamond and Related Materials. 8:1061-1066
The H2 defect with its zero-phonon line at 986.1 nm (1.257 eV, 10141 cm −1 ) was first described in 1956 and characterized in detail in 1990–91. In this paper, the observation of strong H2 bands in greenish-yellow natural type Ia gem-quality diam
Publikováno v:
SPIE Proceedings.
First responders have the need to quickly assess a situation; Understanding if there are biological or explosive hazards present can influence a plan of action. The need for real-time information, however, precludes most laboratory analysis technique
Publikováno v:
SPIE Proceedings.
Micro- and nano-technologies (MNT) have opened up the mid-infrared (IR) spectral region to room temperature techniques that are enabling new applications in chemical imaging. The mid-IR is rich in wavelength specific absorptions that can be used to i
Autor:
Vince Cook, Peter R. Buerki, Sam Crivello, Miles James Weida, Dave Caffey, Michael B. Radunsky, Timothy Day
Publikováno v:
Novel In-Plane Semiconductor Lasers X.
Broad tunability in the mid-IR (~3-12 μm) is desirable for a number of applications. We have built a number of External Cavity quantum cascade Lasers (ECqcL TM ) that maximize tuning range from the quantum cascade chip. As much as 525 cm -1 of pulse
Publikováno v:
Renewable Energy and the Environment.
The extension of FTIR performance by broadly tunable quantum cascade lasers (QCLs) is discussed, including the practical effects of reduced tuning ranges. One application enabled by QCL spectrometers (SOx monitoring) is considered.
Autor:
David F. Arnone, Peter R. Buerki, Dave Caffey, Vince Cook, Timothy Day, Miles James Weida, Michael Pushkarsky, Eric B. Takeuchi
Publikováno v:
SPIE Proceedings.
Commercially available quantum cascade semiconductor materials continue to mature. When integrated into external cavity quantum cascade laser (ECqcL™) geometries, these laser systems are now providing near-continuous coverage throughout the entire