Dr. Christian Heyn Profile

Dr. Christian Heyn

at Univ of Hamburg

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 21 February 2018 Presentation + Paper

Droplet etching during semiconductor epitaxy for single and coupled quantum structures

Ch. Heyn, M. Zocher, A. Küster, W. Hansen

Proceedings Volume 10543, 105430K (2018) https://doi.org/10.1117/12.2295829

KEYWORDS: Gallium arsenide, Excitons, Etching, Nanostructures, Aluminum, Atomic force microscopy, Semiconductors, Quantum dots

Read Abstract +

We give an overview on the present status of self-assembled quantum structure fabrication by using the local droplet etching (LDE) technique during semiconductor molecular-beam epitaxy (MBE). LDE functionalizes nanodroplets to drill spatially well separated nanoholes into semiconductor surfaces. The mechanisms, the influence of substrate and droplet materials, and the control of the nanohole shape and size by the process parameters is discussed. LDE nanoholes in AlGaAs are filled for the creation of strain-free GaAs quantum dots (QDs). LDE QDs demonstrate a tunable emission wavelength, narrow exciton peaks, a low exciton fine-structure splitting, and single-photon emission which suggests them for applications in quantum information processing. The QD shape can be varied by the process parameters from cone-like to a shape where the probability distributions of the charge carriers are concentrated on a cone shell. For the cone-shell QDs, we predict the controlled transformation of either the electron or the hole from a quasi zero-dimensional dot into a one-dimensional quantum ring by a gate-voltage. Furthermore, also coupled quantum systems can be fabricated by a self-aligned vertical stacking into a LDE nanohole. A first example are GaAs quantum dot molecules (QDMs) which are formed from two QDs. LDE QDMs exhibit indirect excitons and anti-crossings which indicates strong coupling. A second example are hybrids composed of a single QD and a plasmonic nanostructure. Here, first results establish that self-assembled metallic nanostructures can be filled into nanoholes and that LDE QDs can be located very close to metallic structures clearly within their optical near-field.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

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

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years