TITLE

Adiabatic compression of parallel-plate metal waveguides for sensitivity enhancement of waveguide THz time-domain spectroscopy

AUTHOR(S)
Zhang, Jiangquan; Grischkowsky, D.
PUB. DATE
February 2005
SOURCE
Applied Physics Letters;2/7/2005, Vol. 86 Issue 6, p061109
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We demonstrate the efficient coupling of THz pulses into and out of an adiabatically compressed parallel-plate metal waveguide. The plate separation of the 63.5-mm long, compressed waveguide was fixed at 103 μm at the entrance and exit ends for efficient coupling, but could be reduced in the middle. The experimental results show strong transmission of the THz signal through the compressed waveguide for a minimum midpoint separation of only 8 μm. This technique can be used to achieve efficient coupling together with higher sensitivity for waveguide THz-TDS.
ACCESSION #
16345464

 

Related Articles

  • ANALYSIS OF WAVEGUIDE SLOT COUPLER FOR COUPLING CHARACTERISTICS. Karunakar, G.; Raju, G. S. N. // International Journal of Engineering Science & Technology;2011, Vol. 3 Issue 9, p6951 

    Waveguide coupler consists of two rectangular pieces in which slot couples power from one waveguide to another. In most of the studies the slot width is neglected. Moreover, the data on coupling for such couplers as a function of frequency is not available. As this information is essential in...

  • Imaging errors in arrayed waveguide gratings. Klekamp, A.; Münzner, R. // Optical & Quantum Electronics;Mar2003, Vol. 35 Issue 4/5, p333 

    A detailed assessment of imaging errors in arrayed waveguide gratings (AWG) is presented, focussing on possible design related imaging errors as well as on typical imaging errors mediated by the fabrication process. From a design point of view, special interest is drawn to the effect of coupling...

  • Analysis of coupling between two-dimensional photonic crystal waveguide and external waveguide. Miyai, Eiji; Okano, Makoto; Mochizuki, Masamitsu; Noda, Susumu // Applied Physics Letters;11/11/2002, Vol. 81 Issue 20, p3729 

    Coupling between conventional wire waveguide and two-dimensional photonic crystal waveguide was analyzed by means of a three-dimensional finite difference time domain method. We evaluated the transmittance corresponding to the coupling efficiency between two waveguides. By using SiO[SUB2] clad...

  • Subwavelength plastic wire terahertz time-domain spectroscopy. Borwen You; Ja-Yu Lu; Tze-An Liu; Jin-Long Peng; Ci-Ling Pan // Applied Physics Letters;2/1/2010, Vol. 96 Issue 5, p051105 

    This work demonstrates the feasibility of a terahertz time-domain spectrometer based on a subwavelength-diameter plastic wire (SPW) for sensing applications. The dispersion property of the SPW is experimentally and theoretically studied. The SPW exhibits a low and controllable waveguide...

  • Analysis of Multilayer Coplanar Waveguide with Finite Conductor Thickness. Singh, Paramjeet; Verma, A. K.; Bansal, Ritu // International Journal of Microwave & Optical Technology;Nov2012, Vol. 7 Issue 6, p380 

    This paper presents the analysis of coplanar waveguide (CPW) with finite conductor thickness using quasi-static spectral domain approach (SDA) method on isotropic dielectric substrate in shielded multilayer configuration. In this method, the conductor strips of finite thickness are replaced by...

  • Superimposed coherent terahertz wave radiation from mono-energetically bunched multi-beam. Shin, Young-Min // Physics of Plasmas;Jun2012, Vol. 19 Issue 6, p063115 

    Intense coherent radiation is obtained from multiple electron beams monochromatically bunched over the wide higher-order-mode (HOM) spectral band in the THz regime. The overmoded waveguide corrugated by dielectric-implanted staggered gratings superimposes evanescent waves emitted from the low...

  • Planar Optical Waveguide Sensor Structures with Grating Couplers. Karasiński, P. // Acta Physica Polonica, A.;Dec2009 Supplement, Vol. 116, pS.30 

    The paper presents optical planar waveguide sensor structures with grating couplers of groove density χ = 2400 g/mm. The waveguide films were obtained using sol-gel method, in which the grating couplers were fabricated by the embossing method. The results of theoretical analysis as well as...

  • Error-field induced electromagnetic torques in a large aspect-ratio, low-β, weakly shaped tokamak plasma. Fitzpatrick, Richard // Physics of Plasmas;Mar2009, Vol. 16 Issue 3, p032502 

    The toroidal electromagnetic braking torques exerted at the various internal rational surfaces of a large aspect-ratio, low-β, weakly shaped, tokamak plasma by a nonaxisymmetric error field are investigated using a semianalytic approach. It is found that there is an optimal error-field...

  • Mutual Coupling Compensation for Direction-of-Arrival Estimations Using the Receiving-Mutual-Impedance Method. Hoi Shun Lui; Hon Tat Hui // International Journal of Antennas & Propagation;2010, Vol. 2010, p1 

    A short review of the receiving-mutual-impedance method (RMIM) for mutual coupling compensation in direction finding applications using linear array is conducted. The differences between the conventional-mutual-impedance method (CMIM) and RMIM, as well as the three different determination...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics