TITLE

Resonant dipole antennas for continuous-wave terahertz photomixers

AUTHOR(S)
Gregory, I. S.; Tribe, W. R.; Cole, B. E.; Evans, M. J.; Linfield, E. H.; Davies, A. G.; Missous, M.
PUB. DATE
August 2004
SOURCE
Applied Physics Letters;8/30/2004, Vol. 85 Issue 9, p1622
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present measurements and numerical simulations for the performance of resonant dipole antennas used in continuous-wave terahertz photomixers. We demonstrate that center-feed dipoles, with inductively choked electrical feeds, are a good choice for a resonant emitter design, and outperform broadband spiral antennas by a factor of five at a resonant frequency of 0.4 THz. Excellent agreement is found between experiment and the predictions of finite element simulations. Furthermore, we show that the dipoles can outperform spirals across frequency bands of over 0.5 THz, opening the way for their use in terahertz spectroscopy.
ACCESSION #
14258773

 

Related Articles

  • Nuclear spin relaxation of sodium cations in bacteriophage Pf1 solutions. Sobieski, D. N.; Krueger, N. R.; Vyas, S.; Augustine, M. P. // Journal of Chemical Physics;12/28/2006, Vol. 125 Issue 24, p244509 

    The nuclear magnetic resonance (NMR) spectra for the I=3/2 23Na cation dissolved into filamentous bacteriophage Pf1 solutions display line splittings and relaxation times consistent with an interaction between the 23Na nuclear quadrupole moment and the electric field gradient produced by the...

  • NMR line shapes from AB spin systems in solids � The role of antisymmetric spin�spin coupling. Harris, Kristopher J.; Bryce, David L.; Wasylishen, Roderick E. // Canadian Journal of Chemistry;Oct2009, Vol. 87 Issue 10, p1338 

    NMR parameters such as indirect nuclear spin�spin coupling (J), nuclear magnetic shielding (s), direct dipolar coupling (D), and electric field gradient (V) are properly described by second-rank tensors. Each may be decomposed into isotropic, symmetric, and antisymmetric components; the...

  • nuclear magnetic resonance.  // American Heritage Student Science Dictionary;2009, p241 

    A definition of the term "nuclear magnetic resonance" is presented. It refers to the absorption of energy (as specific frequencies of radio waves) by the nuclei of atoms that are placed within a strong magnetic field. Because certain atoms absorb specific frequencies, nuclear magnetic resonance...

  • Laser Spectroscopy and $$\beta$$ -NMR Measurements of Short-Lived Mg Isotopes. Kowalska, Magdalena // Hyperfine Interactions;2005, Vol. 162 Issue 1-4, p109 

    The feasibility of studying the neutron-rich 29Mg, 31Mg, and 33Mg isotopes has been demonstrated with the laser and β-NMR spectroscopy setup at ISOLDE/CERN. The values of the magnetic moment and the nuclear spin of 31Mg are reported and reveal an intruder ground state. This proves the...

  • Study of isotope effects in the photoionization of HI and DI using phase lag spectroscopy. Khachatrian, Ani; Billotto, Richard; Zhu, Langchi; Gordon, Robert J.; Seideman, Tamar // Journal of Chemical Physics;6/1/2002, Vol. 116 Issue 21, p9326 

    Phase lag spectroscopic measurements are performed for HI and DI in the 5d(π, δ) resonance region. Measurements of the phase lags for both molecules reveals a strong isotopic effect, especially pronounced in the ionization channel. The energy dependence of the phase lag provides clear...

  • Techniques: NMR on a chip. Tycko, Robert // Nature;4/21/2005, Vol. 434 Issue 7036, p966 

    Focuses on a study by G. Yusa and colleagues about the nuclear magnetic resonance spectroscopy (NMR). Strengths and weaknesses of conventional NMR; Dependence of NMR on manipulations of the spin states of atomic nuclei that possess magnetic moments; Applications of NMR spectroscopy.

  • EPR of trivalent iron centers in a BaF2: Fe crystal. Zhiteĭtsev, E. R.; Ulanov, V. A.; Zaripov, M. M.; Zheglov, E. P. // Physics of the Solid State;Oct2006, Vol. 48 Issue 10, p1887 

    An orthorhombic paramagnetic Fe3+ ion center (concentration of iron ions is 0.1 at. %) was found using EPR in BaF2: Fe crystals irradiated by x rays. The EPR spectra recorded in the Q range at a temperature T = 77 K exhibit both the fine structure typical of a center with effective spin S = 5/2...

  • X-ray spatial frequency heterodyne imaging. Wu, Binbin; Liu, Yanan; Rose-Petruck, Christoph; Diebold, Gerald J. // Applied Physics Letters;2/6/2012, Vol. 100 Issue 6, p061110 

    We derive an expression for the electric field at the image plane from the Kirchhoff-Fresnel integral for a grating in contact with an object in an x-ray, in-line imaging configuration that shows the grating to give a heterodyning effect. We also show how image contrast in a harmonic of the...

  • Solid-state NMR in biological and materials physics. Grey, Clare P.; Tycko, Robert // Physics Today;Sep2009, Vol. 62 Issue 9, p44 

    The article focuses on solid-state NMR spectroscopy biological and materials physics. It offers information about NMR spectrum which mentions that it is specific to a single magnetic isotope often with one and half spin. Furthermore, it mentions that NMR spectroscopy is a simple concept that can...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics