High efficiency near-field electromagnetic probe having a bowtie

Details High efficiency near-field electromagnetic probe having a bowtie High efficiency near-field electromagnetic probe having a bowtie

1996-07-31

1997-12-09

Le, Que

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250308, 343795, H01J 314

Patent

active

056963726

ABSTRACT:
A near field electromagnetic probe converts an incident energy beam into an interrogating beam which exhibits, in the near field vicinity of the probe, a transverse dimension that is small in relation to the wavelength of the incident energy beam. The probe comprises an energy source for providing the incident energy beam with a wavelength .lambda.. An antenna is positioned in the path of the incident energy beam and comprises at least a first conductive region and a second conductive region, both of which have output ends that are electrically separated by a gap whose lateral dimension is substantially less than .lambda.. The electromagnetic system which produces the incident energy should preferably have its numerical aperture matched to the far-field beam pattern of the antenna. Further, the incident beam should have a direction of polarization which matches the preferred polarization of the antenna. The near field probe system of the invention can also sense fields in the near field gap and reradiate these to a far-field optical detector. Thus the probe can serve to both illuminate a sample in the near field gap, and to collect optical signals from an illuminated sample in the near field gap.

REFERENCES:
patent: 4814783 (1989-03-01), Shelton et al.
patent: 4994818 (1991-02-01), Keilmann
patent: 5004307 (1991-04-01), Kino et al.
patent: 5121256 (1992-06-01), Corle et al.
patent: 5125750 (1992-06-01), Corle et al.
patent: 5166697 (1992-11-01), Viladevall et al.
patent: 5272330 (1993-12-01), Betzig et al.
patent: 5286970 (1994-02-01), Betzig et al.
patent: 5286971 (1994-02-01), Betzig et al.
patent: 5288996 (1994-02-01), Betzig et al.
patent: 5288997 (1994-02-01), Betzig et al.
patent: 5288998 (1994-02-01), Betzig et al.
patent: 5354985 (1994-10-01), Quate
Article: New Form of Scanning Optical Microscopy by R.C. Reddick et al. as appeared in Rapid Communications, vol. 39, No. 1, Jan. 1, 1989, pp. 767-770.
Article: A Suggested Method for Extending Microscopic Resolution into the Ultra-Microscopic Region by E.H. Synge., May 25, 1928, pp. 356-362.
Article: Scanning Electromagnetic Transmission Line Microscope with Sub-wavelength Resolution by M. Fee et al. as appeared in Optics Communications, vol. 69, No. 3,4 on Jan. 1, 1989, pp. 219-224.
Article: Bow-tie Antennas on a Dielectric Half-Space Theory and Experiment by Richard C. Compton et al. as appeared in IEEE Transacations on Antennas and Propogation, vol. AP-35, pp. 622-631, Jan. 1987.
Article: Tailoring a High-transmission Fiber Probe for Photon Scanning Tunneling Microscope by T. Saiki et al. as appeared in Appl. Phys. Lett. 68(19) on May 6, 1996, pp. 2612-2614.
Article: Near-field Optics: Microscopy, Spectroscopy, and Surface Modification Beyond the Diffraction Limit by E. Betzig et al. as appeared in Science. Jul. 10, 1992, vol. 257 pp. 189-195.
Article: Extreme Sub-wavelength Resolution with a Scanning Radio-frequency Transmission Microscope by F. Keilmann et al. as appeared in Elsevier Science, Jan. 5, 1996, pp. 1-7.
Article: Super-resolution Fluorescence Near-field Scanning Optical Micrscopy by A. Harootinian et al. as published in Appl. Phys. Lett. 49(11) on Sep. 15, 1986, 3 pages.
Article: Scanning Optical Spectral Microscopy with 500A Spatial Resolution by A. Lewis et al. as appeared in Biophysical Journal vol. 41, p. 405a; W-AM-Pos25, Jan. 1983.
Article: Refractive Index Profile in a Goldfish Eye Lens by D. Lerner et al. as appeared in Biophysical Journal vol. 41, p. 405a; W-AM-Pos26, Jan. 1983.
Article: Near-field Optical-Scanning Microscopy by U. Durig, et al. as appeared in J. Appl. phys. 59(1) dated May 15, 1986, pp. 3318-3327.

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