A microscopic approach to ultrafast near band gap photocurrents in bulk semiconductors

Reinold Podzimski; Huynh Thanh Duc; Torsten Meier

doi:10.1117/12.2250299

23 February 2017 A microscopic approach to ultrafast near band gap photocurrents in bulk semiconductors

Reinold Podzimski, Huynh Thanh Duc, Torsten Meier

Proceedings Volume 10102, Ultrafast Phenomena and Nanophotonics XXI; 101020P (2017) https://doi.org/10.1117/12.2250299
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

In unbiased non-centrosymmetric semiconductors electronic currents can be excited on ultrashort time scales using purely optical excitation. A combined approach of k.p-perturbation theory and the semiconductor Bloch equations can be used to theoretical describe these photocurrents in bulk and quantum well systems. Including the Coulomb interaction and resulting excitonic effects is a very challenging task due to the large numerical requirements. Here, we present a non-standard grid which significantly reduces the numerical requirements while still ensuring converged results. We analyze and compare the convergence behavior of standard Cartesian and geodesic grids for shift current simulations and present results on the enhancement of the shift current by the excitonic resonance in bulk GaAs which are based on an anisotropic three-dimensional k.p band structure.

Conference Presentation

Citation Download Citation

Reinold Podzimski, Huynh Thanh Duc, and Torsten Meier "A microscopic approach to ultrafast near band gap photocurrents in bulk semiconductors", Proc. SPIE 10102, Ultrafast Phenomena and Nanophotonics XXI, 101020P (23 February 2017); https://doi.org/10.1117/12.2250299

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available