Mr. Qi Zhang Profile

Qi Zhang

at National Univ of Defense Technology

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 | 24 November 2021 Paper

Rapid local modulation of VO2 phase transition by graphene heater

Qi Zhang, Yansong Fan, Feng Xiong, Xi Yang, Zhihong Zhu

Proceedings Volume 12066, 120661Q (2021) https://doi.org/10.1117/12.2607299

KEYWORDS: Vanadium, Graphene, Resistance, Modulation, Raman spectroscopy, Thin films, Structural design

Read Abstract +

Vanadium dioxide (VO₂), a thermochromic material with a low phase transition temperature at 68℃ and the magical hysteresis property near the phase transition temperature, has been widely investigated because of its potential application as infrared detector, optical switch, memristor, and ‘smart window’. Graphene, due to its special electrical, optical and thermal properties, has been extensively studied in recent years with layered hybrid structures of other materials. In this paper, to realize flexible manipulation of VO₂ phase transition, we co-designed a graphene heater to locally modulate temperature of VO₂. Typical thermal induced phase transition by temperature control stage has been achieved through electrical measurements, which shows the resistance of VO₂ has gone through a dramatical change over 3 order of magnitude around the critical temperature (68℃). As for the in situ heating manipulation, we applied current to the graphene to generate joule heating, which would result in a hot-spot to locally modulate the temperature of VO₂ to reach the phase transition point. Meanwhile, the electrical current of graphene that results in the structural phase transition of VO₂ could be smaller by inserting Al₂O₃ capping layer between graphene and VO₂. Compared with the traditional macroscale VO₂ device, our nanosized co-designed structure shows both low power consumption and fast response, which would benefit a lot in exploring VO₂ based on-chip electronic applications. In addition, we believe that the designed composite structure has a wide range of research significance in optoelectronic devices.

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