Time-dependent Magneto-Optical System for Simultaneously Investigating Optic, Electric, and Magnetic Properties in Excited States in Organic Functional Materials at Different Length and Time Scales
Abstract
Motivated by the success of using steady-state magneto-optical studies in AFOSR projects, this DURIP project proposes to establish time-dependent magneto-optical system by integrating picosecond time-resolved light-emission spectrometer, pump-probe Faraday rotation, impedance spectrometer (110 MHz), altogether connected with electrical magnet, low temperature cryostat, and optical/electrical excitation sources. The proposed time-dependent magneto-optical system will simultaneously characterize (i) dynamic light-tunable magnetic properties in excited states, magneto-photoluminescence, (ii) magneto-photocurrent, magneto-resistance, (iii) magneto-dielectrics from picoseconds to seconds for functional materials ranging from bulk to nanoscale and atomic levels. The goal of this DURIP project is to provide a new leading-edge platform for making revolutionary breakthroughs in current AFOSR projects by simultaneously characterizing time-dependent coupling mechanisms between optic, electric, and magnetic parameters in excited states, charge transport, and electrical polarization in sensing, detecting, renewable-energy, and lasing materials. Magneto-optical properties in excited states are critically important for revealing the deeper mechanisms in controlling useful and non-useful optic, electric, and magnetic processes in sensing, detecting, renewable-energy, and lasing materials relevant to Air Force applications. Steady-state measurements have been playing a leading role in magneto-optical studies to successfully explore light-tunable magnetic properties, magneto-photoluminescence, magneto-photovoltaics, magneto-current and -dielectrics. However, time-dependent magneto-optical measurements have become an urgent demand to explore innovative mechanisms for developing spin-controllable electro-optics, magnetically controllable optoelectronics, and optically controllable magnetics by using time-dependent coupling behaviors in excited states.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 28, 2018
- Source ID
- FA95501810472
Entities
People
- Bin Hu
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Tennessee