PhD Theses

PhD Thesis Defense by Yu Chen on 14 November 2019 at 11:30 am

The PhD Researcher Yu Chen from the Laboratory of Multifunctional Thin Films and Complex Structures (MULFOX) Group at ICMAB will defend his PhD thesis on Thursday, 14 November 2019, at 11:30 am at the ICMAB
icmab
Oct 23, 2019

Artificial Synapses based on the Photoconductance of LaAlO3/SrTiO3 Quantum Wells

by Yu Chen, Laboratory of Multifunctional Thin Films and Complex Structures (MULFOX) Group at ICMAB-CSIC

Date: Thursday, 14 November 2019
Time: 11:30 am
Venue: ICMAB - Sala d'Actes Carles Miravitlles

Abstract: 
Inspired by neurobiology, neuromorphic computing is proposed to cope with complex cognitional tasks through emulating spiking neural networks consisting of artificial synapses, aiming at overcoming the von Neumann bottleneck in conventional computational paradigms. In this Thesis, we have investigated the optical properties of the LaAlO3/SrTiO3 interfaces, which can be exploited as artificial optical synapses due to their wavelength-dependent time-correlated photoconductance.

We discuss the physical origin of the observed correlated photoresponse in epitaxial LaAlO3/SrTiO3 interface. Additionally, we have explored the photoconductance of amorphous LaAlO3/SrTiO3 interfaces, where the conductance is sensitive to illumination conditions in well-lighted environments. We include a discussion about the perspective of using the persistent photoconductance of LaAlO3/SrTiO3 quantum wells to applications in neuromorphic vision.   


Supervisors:

  • Dr. Gervasi Herranz, ICMAB-CSIC
PhD Committee:
  • President: Dr. Jean Fompeyrine,  IBM Research GmbH, Zurich Research Laboratory, Departament of  Neuromorphic Devices & Systems, Switzerland
  • Secretary: Prof. Valerio Pruneri, Institut de Ciències Fotòniques (ICFO) , Departament of Optoelectronics, Spain
  • Vocal:  Dr. María Teresa Gotarredona Serrano, Consejo Superior de Investigaciones Científicas, Instituto de Microelectronica de Sevilla, Spain
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