Resonant Tunneling with an externally applied voltage

1
Resonant Tunneling with an externally applied
voltage

• Development and Applications EEE434 Final
  ProjectT. Jordan DavisWill Crosby

2
Elusive Engineering Topic
HUMOR
3
Resonant What???

• RTDs Resonant Tunneling Diode Structures
• - Proposed in 1969 by Esaki and Tsu
• - Possible to design and produce controllable
  structures
• - Common Materials are GaAs and Ga1-xAlxAs
• - Its a quantum sandwich! YUM

Kesan, Miller
4
What a recipe
Eaves
5
What we learned in class

• Transmission coefficient can be at or near one
  with the right energy.
• Good generalization
• Not reality, free charge likes to ride the edge
• If you cant take the charge carriers to resonant
  energy, then take the resonant energy to the
  charge carriers

Schubert
Schubert
6
The External Potential to the rescue

• Band bending at
• its best
• Well, well, well...
• ok so theres only
• two wells.

Eaves
7
Mathematical Development...Run for your lives!!!
8
Applications

• Superior to Conventional Devices
• High Speed
• Low Power
• Capabilities
• Amplifiers
• Oscillators
• Wave Detectors
• Frequency Converters

Eaves
9
The Past

• Proof of Concept
• Late 60s
• Theory experiments
• Problems
• Lack of knowledge
• GaAs operates below room temperature

10
The Future

• Moores Law

11
The Present

• Realization
• Silicon based
• Millimeter-Wave Sensor
• 3.2mm wavelength
• Intel's avalanche photodiode

LCSI
12
References

• V.P. Kesan, D. R. Miller. "nfluence of Space
  Charge and Quantum Well Negative Resistances on
  Resonant Tunneling Diodes." Microelectronics
  Research Center
• Schubert, "Resonant tunneling diode (RTD)
  structures." Rensselaer Polytechnic Institute. 9
  Dec 2008 lthttp//www.ecse.rpi.edu/schubert/Course
  -ECSE-629020SDM-2/120Resonant20tunneling20stru
  ctures.pdfgt.
• L. Eaves, T.J. Foster. "Charge Buildup, Intrinsic
  Bistability and energy relaxation in resonant
  tunneling structures." Resonant Tunneling in
  Semiconductors B277(1991) 229-242.
• Laboratory of Chemistry of Surfaces and
  Interfaces, "Resonant tunneling diodes on
  silicon." Saclay Institute of Matter and
  Radiation. 19 July 2005. Saclay Institute of
  Matter and Radiation. 10 Dec 2008
  lthttp//iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/
  ast_visu.php?id_ast321gt.
• Hogan, Hank. "Millimeter-Wave Sensor." Photonics
  Online 20052005 09 Dec 2008 lthttp//www.photonics.
  com/Content/ReadArticle.aspx?ArticleID23055gt.
• Intel, "SiliconPhotonics." Intel.com. 07 December
  2008. Intel Corporation. 10 Dec 2008
  lthttp//www.intel.com/pressroom/kits/photonics2008
  /animation/SiliconPhotonics_html/SiliconPhotonics.
  htmlgt.
• Chudobiak, Michael J. . "A Review of the State of
  the Art in Resonant Tunneling Diodes." AVTECH. 04
  Dec 1995. AVTECH. 09 Dec 2008 lthttp//www.avtechpu
  lse.com/faq.html/IV.32/rtd.htmlgt.
• Crispin, Xavier. "Quantum theory techniques and
  applications." Xavier Crispin. 04 Oct 2000.
  Linköping University. 09 Dec 2008
  lthttp//webstaff.itn.liu.se/xavcr/TNE024/2_Quantu
  m theory_ techniques and applications.pptgt.