Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • JSAP-OSA Joint Symposia 2019 Abstracts
  • OSA Technical Digest (Optica Publishing Group, 2019),
  • paper 19p_E215_10

Photoconductivity in LT-GaAs-on-Si studied by optical pump terahertz probe

Not Accessible

Your library or personal account may give you access


Low temperature grown GaAs (LT-GaAs) has become the choice material for THz photoconductive antennas (PCA) designed for 800 nm applications. Its ultrafast response, high carrier mobility, and high resistivity make it ideal for THz applications. Motivated by the possibility of widening the detection bandwidth and reducing production cost, we explore the use of LT-GaAs grown on Silicon substrates as a material for THz PCAs [1]. Silicon is less absorbing in the THz region compared to GaAs, and can thus reduce THz absorption by the substrate material. Growing GaAs on Si substrates is difficult. Often the GaAs layers grown are riddled with defects such as dislocations, anti-phase boundaries, among others [2]. However, for THz applications, the photoconductive material does not have to be pristine. In this work, optical pump terahertz probe technique was used to measure the complex conductivities of LT-GaAs-on-Si to understand its conduction mechanism and ultimately its suitability as photoconductive material.

© 2019 Japan Society of Applied Physics, The Optical Society (OSA)

PDF Article
More Like This
Ultrafast Dynamics of SI-GaAs and LT-GaAs by Degenerate Pump-Probe Studies

P. T. Anusha, Surya P. Tewari, and S. Venugopal Rao
LW5I.3 Laser Science (LS) 2013

Ultrafast Degenerate Pump-Probe Studies of SI-GaAs and LT-GaAs

P. T. Anusha, Surya P. Tewari, and S. Venugopal Rao
TPo.5 International Conference on Fibre Optics and Photonics (Photonics) 2012

LT-GaAs carrier lifetime evaluation using THz and optical probe techniques at different carrier injection levels

Jessica Pauline Afalla, Valynn Katrine Mag-usara, Takeshi Moriyasu, Hideaki Kitahara, and Masahiko Tani
7a_A409_8 JSAP-OSA Joint Symposia (JSAP) 2017


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access Optica Member Subscription

Select as filters

Select Topics Cancel
© Copyright 2022 | Optica Publishing Group. All Rights Reserved