BYU

Abstract by Megan Nielson

Personal Infomation


Presenter's Name

Megan Nielson

Degree Level

Undergraduate

Co-Authors

Brittany Knighton
Tanner Hardy
Lauren Rawlings
Aldair Alexander

Abstract Infomation


Department

Chemistry and Biochemistry

Faculty Advisor

Jeremy Johnson

Title

Analysis of Terahertz Phonon Modes in beta-Barium Borate

Abstract

Terahertz (THz) radiation can excite specific, frequency-dependent, vibrations in crystals and sufficiently strong radiation can drive those vibrations nonlinearly. Previous work in the Johnson Lab showed that different nonlinear responses (such as two-photon absorption and anharmonic phonon coupling) can be differentiated via 2D spectroscopy. We are currently studying beta-barium borate (BBO) using THz pump-probe measurements to analyze the nonlinear response, better understand ultrafast energy flow, and characterize the nonlinear energy flow as phononic or photonic.