Adventures in THz

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The THz portion of the electromagnetic spectrum presents notable challenges for technological development. This band straddles the domains of classical electromagnetics and photonics, creating a philosophical and practical conflict due to the dual nature of light. This dilemma has historically been termed the "THz gap," characterized by difficulties in generation and propagation. In an AFIT dissertation, research will be conducted to address these issues. The Center for Technical Intelligence Studies and Research (CTISR) has conducted preliminary research using superconductors to transmit THz waves. This dissertation will extend that work by fully characterizing antenna pattern characteristics within the confines of current measurement capabilities and will look to inform future designs for the THz regime. Additionally, THz wave propagation through the atmosphere is significantly attenuated by water vapor absorption in certain sub-bands. The AFIT Center for Directed Energy's HELEEOS code will be examined to potentially refine the prediction of THz propagation characteristics. Time-Domain Spectroscopy (TDS) will be employed to validate these models.


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  • Date: 05 Apr 2024
  • Time: 03:00 PM to 04:00 PM
  • All times are (UTC-04:00) Eastern Time (US & Canada)
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  • Contact Event Hosts

  • timothy.wolfe@afit.edu

    tswolfe@ieee.org

  • Co-sponsored by Wright-Patt Multi-Intelligence Development Consortium (WPMDC), The DOD & DOE Communities

  Speakers

Nathan of AFIT

Topic:

Adventures in THz

The THz portion of the electromagnetic spectrum presents notable challenges for technological development. This band straddles the domains of classical electromagnetics and photonics, creating a philosophical and practical conflict due to the dual nature of light. This dilemma has historically been termed the "THz gap," characterized by difficulties in generation and propagation. In an AFIT dissertation, research will be conducted to address these issues. The Center for Technical Intelligence Studies and Research (CTISR) has conducted preliminary research using superconductors to transmit THz waves. This dissertation will extend that work by fully characterizing antenna pattern characteristics within the confines of current measurement capabilities and will look to inform future designs for the THz regime. Additionally, THz wave propagation through the atmosphere is significantly attenuated by water vapor absorption in certain sub-bands. The AFIT Center for Directed Energy's HELEEOS code will be examined to potentially refine the prediction of THz propagation characteristics. Time-Domain Spectroscopy (TDS) will be employed to validate these models.

Biography:

Lt Col Lehman is a current AFIT EE PhD student, being advised by Maj Wolfe.  Nate received his BSEE from the University of Nevada, Las Vegas (2008) and MSEE from AFIT (2013).  His military career has included being an Operations Engineer for the Airborne Laser Program (Edwards AFB, CA), a Program Manager at The Air Force Research Laboratory Systems Technology Office (WPAFB, OH), an FMS Training Manager for the Security Assistance Office at Resolute Support HQ (Kabul, Afghanistan), the Special Programs Science and Technology Lead for Air Force Space Command (Peterson AFB, CO), and the Program Element Monitor (PEM) for Advanced Space Capabilities at SAF/AQL (Pentagon, VA).  His expected graduation date is August of 2025 and will be returning to AFRL/STO as a follow-on assignment.   




Agenda

The THz portion of the electromagnetic spectrum presents notable challenges for technological development. This band straddles the domains of classical electromagnetics and photonics, creating a philosophical and practical conflict due to the dual nature of light. This dilemma has historically been termed the "THz gap," characterized by difficulties in generation and propagation. In an AFIT dissertation, research will be conducted to address these issues. The Center for Technical Intelligence Studies and Research (CTISR) has conducted preliminary research using superconductors to transmit THz waves. This dissertation will extend that work by fully characterizing antenna pattern characteristics within the confines of current measurement capabilities and will look to inform future designs for the THz regime. Additionally, THz wave propagation through the atmosphere is significantly attenuated by water vapor absorption in certain sub-bands. The AFIT Center for Directed Energy's HELEEOS code will be examined to potentially refine the prediction of THz propagation characteristics. Time-Domain Spectroscopy (TDS) will be employed to validate these models.


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