Russell Battle

Large Resonant Third-order Optical Nonlinearity of CdSe Nanocrystal Quantum Dots

Resonant third-order nonlinear optical susceptibility and hyperpolarizability of CdSe nanocrystal quantum dots were revealed to be ~2.6×10 -20 - 2.7×10 -19 m 2 /V 2 and ~2.2×10 -40 m 5 /V 2 by using nanosecond degenerate four-wave mixing at 532 nm. The large nonlinearity of the CdSe nanocrystals is attributed to the resonant excitation and multiple nonlinear optical processes.

Third-order Optical Nonlinearities of Singlewall Carbon Nanotubes for Nonlinear Transmission Limiting Application

Third-order nonlinear susceptibility of single wall carbon nanotubes thin film was measured to be ~1.4u10 -16 m 2 /V 2 . The nonlinear transmission limiting threshold of carbon SWNT was ~20 MW/cm 2 with visible and nanosecond laser excitation.

Design validation of an eye-safe scanning aerosol lidar with the Center for Lidar and Atmospheric Sciences Students (CLASS) at Hampton University

ITTs Advanced Engineering and Sciences Division and the Hampton University Center for Lidar and Atmospheric Sciences Students (CLASS) team have worked closely to design, fabricate and test an eye-safe, scanning aerosol-lidar system that can be safely deployed and used by students form a variety of disciplines. CLASS is a 5-year undergraduate- research training program funded by NASA to provide hands-on atmospheric-science and lidar-technology education. The system is based on a 1.5 micron, 125 mJ, 20 Hz eye-safe optical parametric oscillator (OPO) and will be used by the HU researchers and students to evaluate the biological impact of aerosols, clouds, and pollution a variety of systems issues. The system design tasks we addressed include the development of software to calculate eye-safety levels and to model lidar performance, implementation of eye-safety features in the lidar transmitter, optimization of the receiver using optical ray tracing software, evaluation of detectors and amplifiers in the near RI, test of OPO and receiver technology, development of hardware and software for laser and scanner control and video display of the scan region.

A portable eye-safe scanning aerosol lidar of the Hampton University Center for Lidar and Atmospheric Sciences Students

Summary from only given. Hampton University Center for Lidar and Atmospheric Sciences Students (CLASS) team and ITTs Advanced Engineering & Sciences Division have worked together to develop a portable, eyesafe and scanning aerosol lidar system, the system is based on a 1.5 micron, 125 mJ, 20 Hz eye-safe optical parametric oscillator (OPO). Its purpose is to remotely detect aerosols, clouds, and pollution in the lower atmosphere.

A portable scanning lidar system used for aerosol detection

In this paper, a 1.5 micron, 3-D scanning, portable and eyesafe aerosol lidar system is presented. The design, testing and field measurements of this lidar are introduced. An aerosol lidar model is used to evaluate lidar systems performance. At the end, the experimental and theoretic atmospheric detection results are presented and compared.

Cubic nonlinearity and hyperpolarizability of gold nanometals

The hyperpolarizabilities of Au nanoparticles and Au/Ag coreshells were estimated to be ~2times10^-41- ~2times10^-40 m⁵/V² with large electronic polarization processes.

Polarization-resolved cubic nonlinearity and optical power limiting of highly porous silica nanoaerogels

A highly porous silica nanoaerogel has a strong optical power limiting behavior with a negative nonlinear property. The third-order nonlinear susceptibility of silica nanoaerogels was estimated to be ~9.6 x 10^-19 m² / V² (~6.9 x 10^-11 esu) from DFWM measurements.

Nonlinear Optical Properties of Nanostructured Supramolecular Organic Semiconductor

Resonant third-order optical susceptibility and hyperpolarizability of donor polymer in chloroform were revealed to be ~2.5 − 9.1 × 10−20 m2/V2 and ~8.6 × 10−42 m5/V2 by degenerate four-wave mixing in nanosecond scale at 532 nm, which was attributed to the resonant enhancement.

The Hampton University Center for Lidar and Atmospheric Sciences Students

A portable, eyesafe, 125 mJ, 20Hz, 1.5 micron scanning aerosol lidar is currently being tested by students and faculty in the Center for Lidar and Atmospheric Sciences in conjunction with ITT and NASA.