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

6 Dec 2004

Volume 85, Issue 23, pp. 5499-5791

Issue Cover Spotlight Figure

Appl. Phys. Lett. 85, 5694 (2004); http://dx.doi.org/10.1063/1.1828575 (3 pages)

M. Y. Shen, C. H. Crouch, J. E. Carey, and E. Mazur
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Light-storing photocatalyst

Junying Zhang, Feng Pan, Weichang Hao, Qi Ge, and Tianmian Wang

Appl. Phys. Lett. 85, 5778 (2004); http://dx.doi.org/10.1063/1.1833554 (3 pages) | Cited 7 times

Online Publication Date: 8 December 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Light-storing photocatalyst was prepared by coating light-storing phosphor and TiO2 photocatalyst in sequence on ceramic. The light-storing photocatalyst can store light irradiation and emit slowly. Consequently, the photocatalyst remains active when the irradiation source is cut off. Rhodamine B (RhB) can be decomposed efficiently by this photocatalyst in the dark after it absorbs light irradiation. This photocatalyst is photoreactive in an outdoor environment or can save energy by supplying irradiation intermittently for the photocatalyst.
Show PACS
82.50.Hp Processes caused by visible and UV light
82.65.+r Surface and interface chemistry; heterogeneous catalysis at surfaces
61.80.Ba Ultraviolet, visible, and infrared radiation effects (including laser radiation)
42.70.-a Optical materials
78.55.Hx Other solid inorganic materials
61.82.Ms Insulators

Triggering and guiding of megavolt discharges by laser-induced filaments under rain conditions

R. Ackermann, K. Stelmaszczyk, P. Rohwetter, G. Méjean, E. Salmon, J. Yu, J. Kasparian, G. Méchain, V. Bergmann, S. Schaper, B. Weise, T. Kumm, K. Rethmeier, W. Kalkner, L. Wöste, et al.

Appl. Phys. Lett. 85, 5781 (2004); http://dx.doi.org/10.1063/1.1829165 (3 pages) | Cited 28 times

Online Publication Date: 8 December 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We demonstrate laser control of high-voltage discharges over a gap of 1.2 m filled with a dense water cloud. Self-guided filaments generated by ultrashort laser pulses are transmitted through the cloud and ionize a continuous plasma channel. The cloud typically reduces the discharge probability in given experimental conditions by 30%, but has almost no influence on the threshold required to trigger single discharge events, both in electrical field and laser energy. This result is favorable for real-scale lightning control applications.
Show PACS
52.80.Hc Glow; corona
52.50.Jm Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.)
52.80.Mg Arcs; sparks; lightning; atmospheric electricity
92.60.Pw Atmospheric electricity, lightning

Direct electron-beam writing of continuous spiral phase plates in negative resist with high power efficiency for optical manipulation

W. C. Cheong, W. M. Lee, X.-C. Yuan, L.-S. Zhang, K. Dholakia, and H. Wang

Appl. Phys. Lett. 85, 5784 (2004); http://dx.doi.org/10.1063/1.1830678 (3 pages) | Cited 24 times

Online Publication Date: 8 December 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Laser beams propagating in Laguerre-Gaussian (LG) modes are of considerable interest due to their widespread applications in the areas of optical manipulation of microparticles, quantum entanglement of photons, nonlinear optics, optical vortex interactions, and atomic studies. However, the proliferation of LG beams has been hampered due to the absence of reliable and reproducible fabrication technologies in producing the required optical elements for their generation. In this letter, we describe a simple, reliable, and reproducible fabrication technique for a micron-sized spiral phase plate with high power efficiency (80%–90%) and good beam uniformity. This facilitates the widespread use of LG beams in various applications: as an example the fabricated elements can easily and readily be incorporated into an existing optical trapping system with minimum modification.
Show PACS
81.07.Bc Nanocrystalline materials
81.16.Nd Micro- and nanolithography
42.62.-b Laser applications
61.46.-w Structure of nanoscale materials
37.10.Vz Mechanical effects of light on atoms, molecules, and ions

Interferometric differentiation between resonant coherent anti-Stokes Raman scattering and nonresonant four-wave-mixing processes

Daniel L. Marks, Claudio Vinegoni, Jeremy S. Bredfeldt, and Stephen A. Boppart

Appl. Phys. Lett. 85, 5787 (2004); http://dx.doi.org/10.1063/1.1829162 (3 pages) | Cited 15 times

Online Publication Date: 8 December 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A major impediment to the use of coherent anti-Stokes Raman scattering (CARS) to identify biological molecules is that the illumination levels required to produce a measurable signal often also produce significant nonresonant background from the medium, especially from water. We present a method of nonlinear interferometry to differentiate between which components of the anti-Stokes signal are resonant and nonresonant. The technique takes advantage of the persistence of intermediate states involved in the resonant process. This method is applicable to most existing pulsed CARS illumination methods and provides for identification of resonant CARS. We demonstrate the method by examining the signals produced by acetone, which exhibits resonance, and water, which does not.
Show PACS
78.30.C- Liquids
78.30.Jw Organic compounds, polymers
42.65.Jx Beam trapping, self-focusing and defocusing; self-phase modulation
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close