Ultrafast Spectroscopic Noninvasive Probe of Vertical Carrier Transport in Heterostructure Devices (Second year of three year progress report)

Abstract

Optical-based approaches have the advantage of being noninvasive and nondestructive, and can usually be performed without modification to the sample. We propose to merge two ultrafast spectroscopy methods, pump-probe spectroscopy and time-domain THz spectroscopy (TDTS), to realize a femtosecond-resolution double-pump-probe spectroscopy technique tunable from the visible through long-wave infrared (LWIR) wavelength range. Our approach allows us to examine not only the transient concentration due to an appropriate pump pulse, but also the time-resolved THz radiation induced by the probe pulse. By analyzing the resulting kinetic profiles, one can obtain critical information about the internal electric fields, radiative and non-radiative recombination rates, carrier drift and diffusion times, and electron and hole velocities.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2014
Accession Number
AD1023969

Entities

People

  • Blair Connelly
  • Grace Metcalfe
  • Stefan P. Svensson

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Absorption
  • Band Gaps
  • Bulk Materials
  • Detection
  • Detectors
  • Electric Fields
  • Electro-Optics
  • Electronics Laboratories
  • Energy Bands
  • Heterojunctions
  • Long-Wavelength Infrared Radiation
  • Polarity
  • Quantum Electronics
  • Quantum Wells
  • Radiation
  • Semiconductors
  • Time Domain

Readers

  • Medical Imaging.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Microelectronics