Bulletin of the American Physical Society
2018 Annual Meeting of the APS Mid-Atlantic Section
Volume 63, Number 20
Friday–Sunday, November 9–11, 2018; College Park, Maryland
Session B01: Poster Session (Day 1)
8:00 PM,
Friday, November 9, 2018
Edward St. John
Room: Lounge
Chair: Wendell T. Hill, III, University of Maryland, College Park
Abstract ID: BAPS.2018.MAS.B01.37
Abstract: B01.00037 : Determination of the Nonlinear Photocurrent Response of AlGaN via 2-Beam Action Spectroscopy
Presenter:
Daniel Jovinelli
(University of Maryland, College Park)
Authors:
Daniel Jovinelli
(University of Maryland, College Park)
Nikolaos Liaros
(University of Maryland, College Park)
John T. Fourkas
(University of Maryland, College Park)
Despite the increasingly growing demand for materials able to undergo multiphoton absorption, the accurate characterization of the nonlinear responses of such materials remains challenging. We employ 2-beam constant-amplitude photocurrent (2-BCAmP) spectroscopy to study nonlinear photocurrent generation in the wide band gap semiconductor AlGaN. Through the use of 2-BCAmP, the nonlinear photocurrent response of the AlGaN photodiodes was studied at a wavelength range of 740-840nm using a mode locked, Ti:sapphire excitation source. The 2-BCAmP experiments reveal the presence of two different orders of absorption in the photodiode. 2-BCAmP experiments at different photocurrents further show that the contributing mechanism is a combination of 2-photon absorption and linear absorption.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAS.B01.37
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