TITLE

Spatial and spectral behavior of the optical near field studied by a terahertz near-field spectrometer

AUTHOR(S)
Mair, S.; Gompf, B.; Dressel, M.
PUB. DATE
February 2004
SOURCE
Applied Physics Letters;2/16/2004, Vol. 84 Issue 7, p1219
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have developed a technique to obtain spectroscopic information in the optical near field. The spectrometer operates in the frequency range from 30 GHz to 1.5 THz using highly monochromatic and coherent radiation which can be continuously tuned. Small pinholes (λ/100–λ/10) in thin copper foils serve as near-field probes. For an accurate, fast, and contact-less control of the probe–sample distance a confocal microscope is employed. We experimentally test the diffraction theory of electromagnetic waves on subwavelength pinholes. Based on our findings we formulate requirements for near-field spectroscopy at THz frequencies. © 2004 American Institute of Physics.
ACCESSION #
12202295

 

Related Articles

  • The Role of a Specific Response of Media in the Vavilov-Cherenkov Effect. Villavicencio, M.; Roa-Neri, J. A. E.; Jiménez, J. L. // Foundations of Physics Letters;Jun2006, Vol. 19 Issue 3, p249 

    It is shown that the condition υ > υp (ω), which is necessary in order to trigger the Vavilov-Cherenkov effect, determines the interval of radiated frequencies and it alone cannot establish a strong restriction to the velocity of the particle. It is exhibited that it is possible to...

  • Continuous wave terahertz spectrometer based on two DFB laser diodes. WILK, RAFAL // Optica Applicata;2010, Vol. 40 Issue 1, p119 

    In this paper, a continuous wave (cw) spectrometer in the far infrared range is presented. Electromagnetic radiation is generated via photomixing phenomena and covers frequencies between about 50 GHz and 1.1 THz with resolution of about 10 GHz. The measured emission characteristics of different...

  • Spectral Analysis Resolution and Study of the Uncertainty Relationship. Bliznetsov, M. T. // Physics Essays;Mar2005, Vol. 18 Issue 1, p63 

    An uncertainty relationship between the width of a pulse frequency spectrum and its time duration and extension in space is investigated. Analysis of the uncertainty relationship is carried out for causal pulses with minimum-phase spectrum. Frequency spectra of elementary pulses are calculated...

  • Spectrum.  // Network Dictionary;2007, p458 

    A definition of the term "Spectrum" is presented. It refers to a continuous range of frequency for electromagnetic waves.

  • Design of a transmission grating spectrometer and an undulator beamline for soft x-ray emission studies. Hatsui, Takaki; Shigemasa, Eiji; Kosugi, Nobuhiro; Warwick, T. // AIP Conference Proceedings;2004, Vol. 705 Issue 1, p921 

    A soft x-ray undulator beamline and an x-ray emission spectrometer have been designed for soft x-ray emission studies. The beamline has a varied-line-spacing plane grating monochromator, which enables the energy resolution over 104 with a beam size down to 10 × 60 μm2. The x-ray emission...

  • STUDY OF RADIONUCLIDE DISTRIBUTION AROUND KUDANKULAM NUCLEAR POWER PLANT SITE (AGASTHEESWARAM TALUK OF KANYAKUMARI DISTRICT, INDIA). Malathi, J.; Selvasekarapandian, S.; Brahmanandhan, G. M.; Khanna, D.; Meenakshisundaram, V.; Mathiyarsu, R. // Radiation Protection Dosimetry;2005, Vol. 113 Issue 4, p415 

    The activity concentration of primordial radionuclides 238U, 232Th and 40K have been measured in the sand samples of Agastheeswaram taluk of Kanyakumari district using gamma-ray spectrometer. The average activity of 232Th, 238U and 40K are found to be 5787.1, 1082.9 Bq kg-1 and BDL,...

  • Modification of photoionization mass spectrometer with synchrotron radiation as ionization source. Chaoqun Huang; Bin Yang; Rui Yang; Jing Wang; Lixia Wei; Xiaobin Shan; Liusi Sheng; Yunwu Zhang; Fei Qi // Review of Scientific Instruments;Dec2005, Vol. 76 Issue 12, p126108 

    In this article we introduce a modification on ion optics of a reflectron time-of-flight mass spectrometer for the study of flame chemistry with synchrotron radiation as a continuous ionization source. A small bias voltage is used in the extraction region to simultaneously reduce the background...

  • Study of Active Shielding for γ - Spectrometers. Bikit, I.; Mrdja, D.; Forkapic, S.; Todorovic, N.; Veskovic, M.; Slivka, J.; Conkic, Lj.; Krmar, M.; Varga, E. // AIP Conference Proceedings;2006, Vol. 831 Issue 1, p409 

    The features of the ground located gamma ray spectrometer shielded passively with 12 cm of lead and actively by five 0.5m × 0.5m × 0.05m plastic veto shields are described. The detector mass related background was 0.345 C/kg s. The 511 keV annihilation line was reduced by the factor of 7...

  • Cauchois-type Compton Spectrometer Using X-ray Image Intensifier. Itou, M.; Sakurai, Y.; Warwick, T. // AIP Conference Proceedings;2004, Vol. 705 Issue 1, p901 

    A new setup of the Cauchois-type x-ray spectrometer for Compton scattering experiments at SPring-8 is described. The new setup employs an x-ray image intensifier (X-II) as a position sensitive detector (PSD). The X-II can detect a single photon, which leads to improvements in both background...

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