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Optics Letters

Optics Letters


  • Vol. 27, Iss. 8 — Apr. 15, 2002
  • pp: 661–663

Whispering-gallery mode terahertz pulses

Jiangquan Zhang and D. Grischkowsky  »View Author Affiliations

Optics Letters, Vol. 27, Issue 8, pp. 661-663 (2002)

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We report what is to our knowledge the first observation of a subpicosecond terahertz (THz) pulse propagating as a superposition of the whispering-gallery modes (WGMs) of a dielectric cylinder. The WGM THz pulses are coupled into and out of a 5-mm-diameter silicon cylinder via a 100-μm -thick, single-mode silicon slab waveguide. We observed two round-trip cylindrical cavity pulses from this coupling structure, which cover a continuous frequency range from 0.4 to 1.8 THz. The coupled-mode equations are used to analyze this system and give reasonably good agreement with the experiment in both the frequency and the time domains.

© 2002 Optical Society of America

OCIS Codes
(230.0230) Optical devices : Optical devices
(250.0250) Optoelectronics : Optoelectronics

Jiangquan Zhang and D. Grischkowsky, "Whispering-gallery mode terahertz pulses," Opt. Lett. 27, 661-663 (2002)

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