TITLE

Aspheric silicon lenses for terahertz photoconductive antennas

AUTHOR(S)
Formanek, Florian; Brun, Marc-Aurèle; Umetsu, Tomoyuki; Omori, Shinji; Yasuda, Akio
PUB. DATE
January 2009
SOURCE
Applied Physics Letters;1/12/2009, Vol. 94 Issue 2, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report on the design and characterization of aspheric focusing silicon lenses for terahertz photoconductive antennas. The lenses are engineered using ray-tracing software and characterized using an optical fiber terahertz time-domain spectroscopy system. We find that using aspheric lenses improves terahertz radiation coupling from the emitter and enables improved collection by the detector. The signal-to-noise ratio and the cutoff frequency of measured terahertz spectra are improved. Minimized aberrations also reduce the focal spot size. Simulations based on Fresnel–Kirchhoff diffraction theory, taking into account the radiation pattern of the emitter and aberrations of the lenses, show good agreement with our measurements.
ACCESSION #
36258468

 

Related Articles

  • Age-related small pupil size may impact effectiveness of aspheric lenses.  // Ocular Surgery News Europe;Apr2011, Vol. 22 Issue 4, p14 

    The article focuses on the relevance of age-based pupil size towards the efficacy of aspheric lenses, which was proved through research done at St. Tomas Hospital in Great Britain.

  • Aspheric waveguide lenses for photonic integrated circuits. Verdiell, J.-M.; Newkirk, M.A.; Koch, T.L.; Gnall, R.P.; Koren, U.; Miller, B.I.; Buhl, L.L. // Applied Physics Letters;2/22/1993, Vol. 62 Issue 8, p808 

    Fabricates an aspheric waveguide lens on the indium phosphide/indium gallium arsenic phosphide material system. Application of chemical wet etching using a photolithogrpahic masking step; Characteristics of the lens; Viability for indium phosphide-based photonic integrated circuit application.

  • Multifocal IOL with add power performs well at all distances, study shows. Cimberle, Michela // Ocular Surgery News Europe/Asia-Pacific Edition;May2009, Vol. 20 Issue 5, p9 

    The article discusses a study on the use of aspheric lens implantation for patients with eye diseases.

  • Semiflexible tools remove ripples. Wallance, John // Laser Focus World;Nov2002, Vol. 38 Issue 11, p17 

    Focuses on the use semiflexible tools to remove ripples in the fabrication of aspheres in optoelectronics. Automatic fabrication of aspheres by magnetorheological finishing; Replacement of standard rigid polishing tool with a semiflexible tool; Use of engineering mechanics analysis.

  • Aspheric optics enhance overall quality of vision. Vasta, Stephanie // Primary Care Optometry News;Mar2010, Vol. 15 Issue 3, p8 

    The article discusses the role of aspheric optics in correcting visual aberrations and enhancing overall quality of vision.

  • Nonrotationally symmetric mirrors provide even light. Derlofske, John Van // Laser Focus World;Jul99, Vol. 35 Issue 7, pS23 

    Discusses the asymmetric design of aspheric mirrors for lightpipes in interior display lighting of automobiles. Illumination of the light pipes; Comparison with planar mirrors; Drawbacks of the design.

  • Aberrations and allowances for errors in a hemisphere solid immersion lens for... Baba, Motoyoshi; Sasaki, Takeaki // Journal of Applied Physics;5/1/1999, Vol. 85 Issue 9, p6923 

    Focuses on a study which presented the aberrations and allowances of hemisphere solid immersion lens (SIL) with typical possible errors. Information on aspheric error, thickness error and an air gap; Conditions on allowances for aberrations; Applications of SIL.

  • Automating aspheric optics manufacturing. Pollicove; Ruckman, Harvey // Ceramic Industry;Dec99, Vol. 149 Issue 13, p57 

    Reports on the performance advantages of aspheric lenses in optical systems. Use of aspheric lenses by military infrared systems; Barriers to the application of aspheres in visible systems; Introduction of computer-controlled machining and microgrinding; Magnetorheological finishing.

  • Numbers put a shine on lens making.  // Professional Engineering;10/07/98, Vol. 11 Issue 18, p66 

    Focuses on the benefits of aspheric mirror and lens profiles, highlighting the development of a polishing machine simply to produce small aspherics ranging from 10mm to 600mm in diameter discovered by researchers. Examination of the polishing machine; Requirement of the machine; Sale of a...

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