APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

9 May 2005

Volume 86, Issue 19, Articles (19xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 86, 191102 (2005); http://dx.doi.org/10.1063/1.1922084 (3 pages)

Nir Dahan, Avi Niv, Gabriel Biener, Vladimir Kleiner, and Erez Hasman
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Time-difference between the electric field components of signals prior to major earthquakes

P. A. Varotsos, N. V. Sarlis, and E. S. Skordas

Appl. Phys. Lett. 86, 194101 (2005); http://dx.doi.org/10.1063/1.1924870 (3 pages) | Cited 3 times

Online Publication Date: 4 May 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We present data demonstrating that the electric field components of low-frequency ( ⩽ 1 Hz) precursory electric signals exhibit markedly different time evolutions. This difference, if properly measured, upon considering that the electromagnetic fields obey diffusion-type equations, is of profound importance since it can reveal the distance of the measuring site from the epicenter of the impending earthquake.
Show PACS
91.25.Qi Geoelectricity, electromagnetic induction, and telluric currents
91.30.Px Earthquakes

Midinfrared sensors meet nanotechnology: Trace gas sensing with quantum cascade lasers inside photonic band-gap hollow waveguides

Christy Charlton, Burak Temelkuran, Gregor Dellemann, and Boris Mizaikoff

Appl. Phys. Lett. 86, 194102 (2005); http://dx.doi.org/10.1063/1.1925777 (3 pages) | Cited 19 times

Online Publication Date: 5 May 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
An integrated midinfrared sensing system for trace level (ppb) gas analysis combining a quantum cascade laser with an emission frequency of 10.3 μm with a frequency matched photonic band-gap hollow core waveguide has been developed, demonstrating the sensing application of photonic band-gap fibers. The photonic band-gap fiber simultaneously acts as a wavelength selective waveguide and miniaturized gas cell. The laser emission wavelength corresponds to the vibrational C–H stretch band of ethyl chloride gas. This sensing system enabled the detection of ethyl chloride at concentration levels of 30 ppb (v∕v) with a response time of 8 s probing a sample volume of only 1.5 mL in a transmission absorption measurement within the photonic band-gap hollow core waveguide, which corresponds to a sensitivity improvement by three orders of magnitude compared to previously reported results obtained with conventional hollow waveguides.
Show PACS
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
07.57.Kp Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors
85.60.Gz Photodetectors (including infrared and CCD detectors)
82.80.-d Chemical analysis and related physical methods of analysis
42.70.Qs Photonic bandgap materials
42.82.Et Waveguides, couplers, and arrays
42.81.Wg Other fiber-optical devices
42.55.Px Semiconductor lasers; laser diodes
42.62.Eh Metrological applications; optical frequency synthesizers for precision spectroscopy
42.81.Pa Sensors, gyros
42.79.Qx Range finders, remote sensing devices; laser Doppler velocimeters, SAR, and LIDAR

Rotational motion of microsphere packs on acoustically excited surfaces

M. D. Murthy Peri and Cetin Cetinkaya

Appl. Phys. Lett. 86, 194103 (2005); http://dx.doi.org/10.1063/1.1926417 (3 pages) | Cited 6 times

Online Publication Date: 5 May 2005

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The generation of uniform rotational motion of polystyrene latex microsphere packs on silicon oxide dry surfaces in base-excited acoustic fields is demonstrated. The physics of microparticle dynamics on surfaces is substantially different from its counterparts in meso/macroscale due to the domination of intermolecular forces in microscale objects. The stability of packs presented in the current experimental study suggests that rolling resistance due to elasticity and adhesion plays an essential role in pack formation. The control of the rotational speed of microspheres with the pulse repetitive frequency of the pulser circuit is illustrated. The present work could lead to a motion excitation mechanism for microscale systems.
Show PACS
81.05.Lg Polymers and plastics; rubber; synthetic and natural fibers; organometallic and organic materials
81.40.Jj Elasticity and anelasticity, stress-strain relations
62.20.D- Elasticity
68.35.Np Adhesion
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close