Dr. Ankitha E. Bangera Profile

Dr. Ankitha E. Bangera

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 | 1 March 2019 Presentation + Paper

Surface engineering using compounds of titanium nanocoatings for silicon-based optical devices

Ankitha Bangera, Kumar Appaiah, Subhananda Chakrabarti

Proceedings Volume 10919, 1091926 (2019) https://doi.org/10.1117/12.2506678

KEYWORDS: Silicon, Titanium, Silicon films, Annealing, Reflectivity, Thin films, Reflection, Transmittance, Absorbance, Absorption

Read Abstract +

Most silicon based detectors are sensitive predominantly in the visible region. To extend their sensitivity further into the UV and IR regions, surface modification techniques can be employed. In addition, there is always a need for biocompatible, eco-friendly, and cost effective devices for bio-medical applications. Therefore, devices fabricated using silicon and titanium can enable the fabrication of affordable health care devices. Another critical factor that plays a major role in controlling the device performance is its surface wettability. Tuning the surface energy and thus its wettability can improve the stability, passivation, self-cleaning, and anti-aging properties of device surfaces. In this paper, we present a method for tuning the surface wettability with enhanced optical absorption in the UV-Vis-NIR regions. We optimize the titanium coatings on silicon substrates and demonstrate how the controlled deposition of film thickness and annealing temperature or time can affect the self-cleaning behavior and light localization with anti-reflection properties of surfaces. We take the combined advantage of the anti-reflective properties of anatase or rutile phases of oxides of titanium (TiO_x) and the nature of opto-semiconductor Schottky barrier Ti-O-Si formed at the titanium and silicon interface for the improved absorption in a wide spectral range of radiation ranging from 200 nm (UV) to 3000 nm (short-wavelength infrared) wavelengths. An average optical reflectance tuned to less than 10% and absorbance greater than 70% can be obtained. Further, these coatings act as a protective encapsulation by possessing a hydrophobic surface with water contact angles < 100°.

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