Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1998-07-27
2000-11-28
Le, Que T.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
313537, 343721, H01J 4014
Patent
active
061538728
ABSTRACT:
An apparatus for high speed gating of electric current based on the resonant interaction of tunneling electrons with optical fields is disclosed. The present invention biases an electron-emitting tip with a DC voltage source and focuses an output from a laser on the electron-emitting tip to stimulate electron emission from the tip. The electron emission creates an electrical signal that is coupled to circuitry for further processing. In accordance with the present invention, various methods of coupling the electrical signal from the electron-emitting tip are disclosed, as are various methods of reducing the magnitude of the laser output needed to stimulate electron emission, and methods of enhancing the static current density.
REFERENCES:
patent: 5508627 (1996-04-01), Patterson
M. J. Hagmann, "Resonance due to the Interaction of Tunneling Particles with Modulation Quanta," Applied Physics Letters, vol. 66, Feb. 13, 1995, pp. 789-791.
M. J. Hagmann, "Calculations for an Experiment for Determining the Duration of Quantum Tunneling with a Laser-Illuminated Field Emitter," Journal of Vacuum Science and Technology B, vol. 13, Mar./Apr. 1995, pp. 403-406.
M. J. Hagmann, "Simulations of the Interaction of Tunneling Electrons with Optical Fields in Laser-Illuminated Field Emission," Journal of Vacuum Science and Technology B, vol. 13, May/Jun., 1995, pp. 1348-1352.
M. J. Hagmann, "Mechanism for Resonance in the Interaction of Tunneling Particles with Modulation Quanta," Journal of Applied Physics, vol. 78, Jul. 1, 1995, pp. 25-29.
M. J. Hagmann, "Efficient Numerical Methods for Solving the Schrodinger Equation with a Potential Varying Sinusoidally with Time," International Journal of Quantum Chemistry, vol. 56, Quantum Symposium Issue No. 29, 1995, pp. 289-295 month unknown.
M. J. Hagmann, "Microwave Tunneling Current from the Resonant Interaction of an Amplitude Modulated Laser with a Scanning Tunneling Microscope," Journal of Vacuum Science and Technology B, vol. 14, Mar./Apr., 1996, pp. 838-841.
M. J. Hagmann "Efficient Numerical Method for Finding the Initial Response of Quantum Processes to Changes in the Potential," International Journal of Quantum Chemistry, vol. 60, Quantum Symposium Issue No. 30, 1996, pp. 1231-1239 month unknown.
M. Brugat and M. J. Hagmann, "Measurements of Modulation of the Current in a Field Emitter Caused by a Laser," Journal de Physique IV, vol. 6, Colloque C5, Sep., 1996, pp. 147-151.
M. J. Hagmann, "Simulations of Modulation of the Current in a Field Emitter Caused by a CW or Pulsed Laser," Journal de Physique IV, vol. 6, Colloque C5, Sep., 1996, pp. 71-76.
M. J. Hagmann and M. Brugat, "Modulaton of the Current in a Field Emitter Caused by a Continuous Wave or Pulsed Laser: Simulations and Experimental Results," Journal of Vacuum Science and Technology B, vol. 15, Mar./Apr., 1997, pp. 405-409.
M. J. Hagmann, "Intensification of Optical Electric Fields Caused by the Interaction with a Metal Tip in Photofield Emission and Laser-Assisted Scanning Tunneling Microscopy," Journal of Vacuum Science and Technology B, vol. 15, May/Jun., 1997, pp. 597-601.
M. J. Hagmann, "Simulations of Laser-Assisted Field Emission within the Local Density Approximation of Kohn-Sham Density-Functional Theory," International Journal of Quantum Chemistry, vol. 65, Quantum Symposium Issue No. 31, 1997, pp. 857-865 month unknown.
M. J. Hagmann, "Simulations of the Generation of Broadband Signals from DC to 100 Thz by Photomixing in Laser-Assisted Field Emission," Ultramicroscopy (in press), Received Jul. 7, 1997.
M. J. Hagmann, Abstract of Presentation of "Design of an Experiment for Determining the Duration of Quantum Tunneling with a Laser-Illuminated Field Emitter," 7th International Vacuum Microelectronics Conference, Grenoble, France, Jul. 4-7, 1994.
M. J. Hagmann, Abstract of Presentation of "Design of an Experiment with a Laser-Illumitated Field Emitter in Order to Determine the Duration fo Quantum Tunneling," 41st International Field Emission Symposium, Rouen, France, Jul. 11-15, 1994.
M. J. Hagmann, Abstract of Presentation of "Experimental Design for Determining the Duration of Quantum Tunneling with Laser-Illuminated Field Emission," 41st National Symposium of the American Vacuum Society, Denver, Colorado, Oct. 24-28, 1994.
M. J. Hagmann, Abstract of presentation of "Efficient Numerical Methods for Solving the Schrodinger Equation with a Potential varying Sinusoidally with time," Sanibel Symposium, St. Augustine, Florida, Feb. 25-Mar. 4, 1995.
M. J. Hagmann, Abstract of presentation of "Microwave Generation due to the Resonant Interaction of Tunneling Particles with Modulation Quanta," STM'95, Eighth International Conference on Scanning Tunneling Microscopy/Spectroscopy, Snowmass Village, Colorado, Jul. 23-28, 1995.
M. J. Hagmann, Abstract of presentation of "Efficient Numerical Method for Finding the Initial Response of Quantum Processes to Changes in the Potential," Sanibel Symposium, St. Augustine, Florida, Feb. 24-Mar. 2, 1996.
M. J. Hagmann, Abstract of presentation of "Simulations of the Effect of an Intense Laser Pulse on the Tunneling Current in a Field Emitter," 24th Annual Symposium on Applied Vacuum Science & Technology, Orlando, Florida, Mar. 11-14, 1996.
M. Brugat and M. J. Hagmann, Abstract of Presentation of "Measurements of Modulation of Tunneling Current Caused by Laser Illumination of a Field Emitter," 24th Annual Symposium on Applied Vacuum Science & Technology, Orlando, Florida, Mar. 11-14, 1996.
M. J. Hagmann and M. Brugat, Abstract of Presentation of "Modulation of the Current in a Field Emitter Caused by a CW or Pulsed Laser-Simulations and Experimental Results," 9th International Vacuum Microelectronics Conference, St. Petersburg, Russia, Jul. 7-12, 1996.
M. J. Hagmann, Abstract of Presentation of "Simulations of Modulation of the Current in a Field Emitter Caused by a CW or Pulsed Laser," 43rd Intenational Field Emission Symposium, Moscow, Russia, Jul. 14-19, 1996.
M. Brugat and M. J. Hagmann, Abstract of Presentation of "Measurements of Modulation of the Current in a Field Emitter Caused by a Laser," 43rd International Field Emission Symposium, Moscow, Russia, Jul. 14-19, 1996.
M. J. Hagmann, Abstract of Presentation of "Use of Density Functional Theory to Simulate Laser-Assisted Field Emission with CW and Pulsed Lasers," 25th Annual Symposium on Applied Vacuum Science & Technology, Orlando, Florida, Feb. 17-20, 1997.
M. Brugat and M. J. Hagmann, Abstract of Presentation of "Measurements of Radio Frequencey Tunneling Current in Resonant Laser-Assisted Field Emission with an Amplitude Modulated Laser," 25th Annual Symposium on Applied Vacuum Science & Technology, Orlando, Florida, Feb. 17-20, 1997.
M. J. Hagmann, Abstract of Presentation of "Use of Density Functional Theory to Model the Effect of a CW or Pulsed Laser on Field Emission," Sanibel Symposium, St. Augustine, Florida, Mar. 1-7, 1997.
M. J. Hagmann, Abstract of Presentation of "Simulations of the Generation of Broadband Signals from DC to 100 THz by Photomixing in Laser-Assisted Field Emission," 44th International Field Emission Symposium, Tsukuba, Japan, Jul. 7-11, 1997.
Asakawa et al., "Use of Multiphoton Photoelectric Process to Generate a High Brightness Electron Beam for Free-Electron Lasers," Applied Physics Letters, vol. 64, No. 16, pp. 2056-2058, 1994 month unknown.
Hagmann, et al., "Modulation of the Current in a Field Emitter Caused by a Continuous Wave or Pulsed Laser: Simulations and Experimental Results," Jourhal of Vacuum Science and Technology: Part B, vol. 15, No. 2, pp. 405-409, 1997 month unknown.
Thomas et al., "Photosensitive Field Emission from Silicon Point Arrays," Applied Physics Letters, vol. 21, No. 8, pp.384-386, 1972 month unknown.
Radon et al., "Photofield Emission Spectroscopy of Ba on W," ACTA Physica Polonica A, vol. 87, No. 3, pp. 657-662, 1995 month unknown.
Radon, T., "PhotoField Emission Spectroscopy of Gamma-P and Gamma-<013> bands of tungsten," Surface Science, vol. 100, No. 2, pp. 353-367, 1980 month unknown.
PCT/US98/25072 International Se
Brugat Manuel
Hagmann Mark J.
Florida International University for and on behalf of the Board
Le Que T.
Luu Thanh X.
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