Mr. Fengling Tang Profile

Fengling Tang

at BUPT

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 | 4 November 2016 Paper

Purcell enhancement of emitting from the quantum-dot-in-nanowire structure surrounded by Au

Fengling Tang, Xin Yan, Xia Zhang, Xiaomin Ren

Proceedings Volume 10027, 100271E (2016) https://doi.org/10.1117/12.2245852

KEYWORDS: Gold, Single photon, Finite-difference time-domain method, Gallium arsenide, Quantum efficiency, Quantum communications, Quantum computing, Nanowires, Photonics, Quantum dots

Read Abstract +

Single photon sources are key devices for quantum communication and quantum computation. Recently, photonic nanowires with an embedded quantum dot have demonstrated to provide remarkable extraction efficiency due to the axial waveguide configuration and nanocavity function of nanowire. However, for thin nanowires, stable modes cannot be supported, resulting in very poor Purcell factor which is an important parameter of single photon sources. In this paper, a novel single photon source structure with a high Purcell factor is proposed and simulated. The structure consists of a GaAs nanowire embedded with an InAs quantum dot surrounded by Au. The enhancement of the Purcell factor is simulated by finite difference time domain (FDTD) method. Without Au shell, the Purcell factor quickly drops as the diameter of nanowire decreases. When the diameter is decreased to 50 nm, the nanowire cannot support any stable modes, resulting in a rather low Purcell factor of 0.009. After the Au shell is introduced, the Purcell factor is dramatically enhanced, and the enhancement ratio increases as the nanowire diameter decreases. The highest enhancement ratio of 1028 can be obtained at a nanowire diameter of 25 nm and Au shell thickness of 75 nm. The enhancement of the Purcell factor is attributed to the decrease of the cavity effective mode volume, which is inversely proportion to the Purcell factor. This work may offer a way to achieve single photon sources with an ultra-small size and ultrahigh Purcell factor.

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