High power THz to IR Emission by Femtosecond Laser Irradiation of Random 2D Metallic Nanostructures

Abstract

Terahertz (THz) spectroscopic sensing and imaging has identified its potentials in a number of areas such as standoff security screening at portals, explosive detection at battle fields, bio-medical research, and so on. With these needs,the development of an intense and broadband THz source has been a focus of THz research. In this work, we report an intense (~10mW) and ultra-broadband (~150THz) THz to infrared (IR) source with a Gaussian wavefront,emitted from nano-pore-structured metallic thin films with femtosecond laser pulse excitation. The underlying mechanism has been proposed as thermal radiation. In addition, an intense coherent THz signal was generated through the optical rectification process simultaneously with the strong thermal signal. This unique feature opens upnew avenues in biomedical research

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Document Details

Document Type
Technical Report
Publication Date
Jul 24, 2015
Accession Number
AD1058094

Entities

People

  • Cunlin Zhang
  • Hai Wang
  • Kaijun Mu
  • Liangliang Zhang
  • Xiaoxuan Zhang
  • Yunsong Zhou

Organizations

  • University of Rochester

Tags

Communities of Interest

  • Biomedical
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Biomedical Research
  • Detection
  • Detectors
  • Electric Fields
  • Electromagnetic Radiation
  • Femtosecond Lasers
  • Films
  • Frequency
  • Laser Pulses
  • Materials
  • Materials Science
  • Measurement
  • Metal Films
  • Nanostructures
  • Surface Temperature
  • Thermal Radiation
  • Thin Films

Fields of Study

  • Physics

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Sensor Fusion and Tracking Systems.

Technology Areas

  • Biotechnology
  • Directed Energy
  • Microelectronics