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

12 Nov 2007

Volume 91, Issue 20, Articles (20xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 91, 203501 (2007); http://dx.doi.org/10.1063/1.2806922 (3 pages)

Michael N. Feiginov and Dibakar Roy Chowdhury
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Subwavelength imaging by metallic slab lens with nanoslits

Ting Xu, Cunlei Du, Changtao Wang, and Xiangang Luo

Appl. Phys. Lett. 91, 201501 (2007); http://dx.doi.org/10.1063/1.2811711 (3 pages) | Cited 15 times

Online Publication Date: 13 November 2007

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A metallic slab lens featured with specially designed nano slits is presented to realize imaging for arbitrary object and image distances. Based on the particular propagation properties of surface plasmon polaritons in nanostructures, slits perforated in silver slab are designed with variant widths to produce desired optical phase retardations. Numerical simulation of an illustrative lens is performed through finite-difference time-domain method and shows that subwavelength imaging is realized at the designed position.
Show PACS
42.79.Bh Lenses, prisms and mirrors
73.20.Mf Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
71.36.+c Polaritons (including photon-phonon and photon-magnon interactions)

Electron temperature measurements in plasmas with surface wave absorption and wave cutoff frequency

Jung-Hyung Kim, S. J. You, Dae-Jin Seong, and Yong-Hyeon Shin

Appl. Phys. Lett. 91, 201502 (2007); http://dx.doi.org/10.1063/1.2812567 (3 pages) | Cited 2 times

Online Publication Date: 13 November 2007

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A method for the measurements of electron temperature in the plasma using cutoff frequency and surface wave absorption frequency is described. The cutoff frequency, which gives directly the plasma density, is obtained from the transmission spectrum measured between two antennas exposed to the plasma. The surface wave absorption frequency, which has the information of the sheath determined by the electron density and the electron temperature, is obtained from the reflection spectrum measured at radiating antenna. The electron temperature is derived from the dispersion equation of the surface wave with the electron density measured from cutoff frequency.
Show PACS
52.35.Hr Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid)
52.25.-b Plasma properties
52.40.Kh Plasma sheaths

Gas-discharge plasma sources for nonlocal plasma technology

V. I. Demidov, C. A. DeJoseph, Jr., and V. Ya. Simonov

Appl. Phys. Lett. 91, 201503 (2007); http://dx.doi.org/10.1063/1.2815930 (3 pages) | Cited 3 times

Online Publication Date: 15 November 2007

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Nonlocal plasma technology is based on the effect of self-trapping of fast electrons in the plasma volume [ V. I. Demidov, C. A. DeJoseph, Jr., and A. A. Kudryavtsev, Phys. Rev. Lett. 95, 215002 (2006) ]. This effect can be achieved by changing the ratio of fast electron flux to ion flux incident on the plasma boundaries. This in turn leads to a significant change in plasma properties and therefore can be useful for technological applications. A gas-discharge device which demonstrates control of the plasma properties by this method is described.
Show PACS
52.50.Dg Plasma sources
52.80.-s Electric discharges

A high-brightness circular charged-particle beam system

T. Bemis, R. Bhatt, C. Chen, and J. Zhou

Appl. Phys. Lett. 91, 201504 (2007); http://dx.doi.org/10.1063/1.2815938 (3 pages)

Online Publication Date: 15 November 2007

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A method is presented for the design of a high-brightness nonrelativistic circular beam system including a charged-particle emitting diode, a diode aperture, a circular beam tunnel, and a focusing magnetic field that matches the beam from the emitter to the beam tunnel. The applied magnetic field is determined by balancing the forces throughout the gun and transport sections of the beam system. The method is validated by three-dimensional simulations.
Show PACS
29.27.-a Beams in particle accelerators
85.30.Mn Junction breakdown and tunneling devices (including resonance tunneling devices)

The magnetic-field-induced transition from an expanding plasma to a double layer containing expanding plasma

C. Charles and R. W. Boswell

Appl. Phys. Lett. 91, 201505 (2007); http://dx.doi.org/10.1063/1.2814877 (3 pages) | Cited 33 times

Online Publication Date: 16 November 2007

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The magnetic-field-induced transition from a simple expansion to a double layer is experimentally investigated in an argon low pressure radio frequency helicon source plasma. When the magnetic field is increased from 30 to 140 G in the plasma source, an abrupt increase in the plasma density and upstream potential is measured at 50 G. In the downstream plasma, the plasma density and potential show a small decrease with increasing magnetic field and no abrupt change. When the upstream jump is measured, simultaneous measurements in the downstream plasma show an ion beam characteristic of a double layer near the source exit.
Show PACS
52.50.Dg Plasma sources
52.25.Fi Transport properties
52.70.Ds Electric and magnetic measurements
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close