High power terahertz emission from a single gate AlGaN/GaN field effect transistor with periodic Ohmic contacts for plasmon coupling

Onishi, Toshikazu; Tanigawa, Tatsuya; Takigawa, Shinichi
August 2010
Applied Physics Letters;8/30/2010, Vol. 97 Issue 9, p092117
Academic Journal
We report on room temperature terahertz (THz) emission by a single, short gate AlGaN/GaN field effect transistor with grating Ohmic contacts. The fingers of metal contacts are fabricated at the nanoscale in length and spacing in order to work as a radiation coupler of electron plasmons in the THz range. Spectrum analysis revealed a broadband emission centered at 1.5 THz with a controlled polarization by the grating contacts. The measured output power is linearly increased with the drain input power and reached up to 1.8 μW.


Related Articles

  • Mechanism for ohmic contact formation of Ni/Ag contacts on p-type GaN. Ho Won Jang; Jong-Lam Lee // Applied Physics Letters;12/13/2004, Vol. 85 Issue 24, p5920 

    The mechanism for ohmic contact formation of Ni/Ag contacts on p-type GaN was investigated using synchrotron photoemission spectroscopy. A low contact resistivity of 6.6×10-5 Ω cm2 was obtained from Ni(50 Å)/Ag(1200 Å) contact after annealing at 500°C in O2 ambient. Ni...

  • Role of mode coupling on transmission properties of subwavelength composite hole-patch structures. Changlei Wang; Jianqiang Gu; Jiaguang Han; Qirong Xing; Zhen Tian; Feng Liu; Lu Chai; Yanfeng Li; Minglie Hu; Qingyue Wang; Xinchao Lu; Weili Zhang // Applied Physics Letters;6/21/2010, Vol. 96 Issue 25, p251102 

    We report the coupling between surface plasmons and dipole-localized surface plasmons in a composite hole-patch structure at terahertz frequencies. The coupling is found to be changed by increasing the inner patch size, which causes prominent resonance frequency shift in the enhanced...

  • Grating-bicoupled plasmon-resonant terahertz emitter fabricated with GaAs-based heterostructure material systems. Otsuji, Taiichi; Meziani, Yahya Moubarak; Hanabe, Mitsuhiro; Ishibashi, Takuma; Uno, Tomohiro; Sano, Eiichi // Applied Physics Letters;12/25/2006, Vol. 89 Issue 26, p263502 

    A grating-bicoupled plasmon-resonant terahertz emitter was fabricated using InGaP/InGaAs/GaAs heterostructure material systems. The device structure is based on a high-electron mobility transistor and incorporates doubly interdigitated grating gates that periodically localize the two-dimensional...

  • Resonant Excitation of Terahertz Surface Plasmons in Subwavelength Metal Holes. Weili Zhang; Azad, Abul K.; Jiaguang Han // Active & Passive Electronic Components;Jan2007, Vol. 2007, Special section p1 

    We present a review of experimental studies of resonant excitation of terahertz surface plasmons in two-dimensional arrays of subwavelength metal holes. Resonant transmission efficiency higher than unity was recently achieved when normalized to the area occupied by the holes. The effects of hole...

  • Transmission Properties of Metallic Grating with Subwavelength Slits in THz Frequency Region. Dong Liang; Qirong Xing; Zhen Tian; Changlei Wang; Weili Zhang; Jianqiang Gu; Yanfeng Li; Lu Chai; Qingyue Wang; Zheltikov, Aleksei // Active & Passive Electronic Components;Jan2007, Vol. 2007, Special section p1 

    This paper presents a fully experimental and theoretical study on transmission properties of a deep metallic grating with subwavelength slits in THz frequency region by using THz time domain spectroscopy (THz-TDS). The grating exposed to p-polarized incident wave exhibits enhanced nonresonant...

  • Effects of Microstructure Variations on Macroscopic Terahertz Metafilm Properties. O'Hara, John F.; Smirnova, Evgenya; Azad, Abul K.; Hou-Tong Chen; Taylor, Antoinette J. // Active & Passive Electronic Components;Jan2007, Vol. 2007, Special section p1 

    The properties of planar, single-layer metamaterials, or metafilms, are studied by varying the structural components of the splitring resonators used to comprise the overall medium. Measurements and simulations reveal how minor design variations in split-ring resonator structures can result in...

  • Extraordinary Transmission and Enhanced Emission with Metallic Gratings Having Converging-Diverging Channels. Battula, Arvind; Yalin Lu; Knize, R. J.; Reinhardt, Kitt; Shaochen Chen // Active & Passive Electronic Components;Jan2007, Vol. 2007, Special section p1 

    Transmission metallic gratings having the shape of converging-diverging channel (CDC) give an extra degree of freedom to exhibit enhanced transmission resonances. By varying the gap size at the throat of CDC, the spectral locations of the transmission resonance bands can be shifted close to each...

  • Guiding Terahertz Waves by a Single Row of Periodic Holes on a Planar Metal Surface. Linfang Shen; Xudong Chen; Xufeng Zhang; Agarwal, Krishna // Plasmonics;Jun2011, Vol. 6 Issue 2, p301 

    In this paper, we show that surface plasmon polaritons (SPPs) can be sustained by a single row of holes periodically drilled on a perfect electric conductor surface. These SPPs can be strongly confined in the transverse plane and they possess an excellent modal shape. In the terahertz regime,...

  • Latest results from time resolved intensity and polarization measurements at MAMI. Schuler, J.; Aulenbacher, K.; Baba, T.; Harrach, D. v.; Horinaka, H.; Nakanishi, T.; Okumi, S.; Reichert, E.; Roethgen, J.; Togawa, K. // AIP Conference Proceedings;2001, Vol. 570 Issue 1, p926 

    At the Institute of Nuclear Physics at Mainz we investigate time resolved intensity and polarization spectra in the photoelectron emission from different types of highly polarized p-type strained layer and superlattice photo cathodes used for polarized electron sources at accelerator facilities....


Read the Article


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

Try another library?
Sign out of this library

Other Topics