Dr. Joseph L. Lawson Profile

Dr. Joseph L. Lawson

SPIE Involvement:

Author

Publications (2)

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 | 9 March 2013 Paper

Design of microcantilever sensors using SLM based holographic lithography

Joseph Lawson, Nathan Jenness, Robert Clark

Proceedings Volume 8612, 861203 (2013) https://doi.org/10.1117/12.2003206

KEYWORDS: Spatial light modulators, Sensors, Lithography, Holography, Microscopes, Holograms, Data acquisition, Modulation, Proteins, Phase shift keying

Read Abstract +

A holographic multiphoton fabrication technique is applied to the development of a microcantilever based analyte sensor. Holograms generated using a spatial light modulator (SLM) initiate the fabrication of sub-micron three-dimensional structures. Chemically functional microstructures are patterned onto the surface of commercially available piezoelectric microcantilevers using this holographic lithography technique. Controlling the form and location of the added structure enables the resonant frequency of the cantilever to be regulated with a higher accuracy than is currently available using bulk lithography techniques and without the inclusion of additional electronic feedback control components. A potential analyte sensor is then developed by patterning on an array of multiple piezoelectric microcantilevers, which are initially identical within manufacturing tolerances. The resonant frequency, was adjusted such that cantilevers, which were initially separated by 2.82 kHz, are tuned to be within 0.13 kHz of each other. Connecting the piezoelectric microcantilevers in series enables the response of each sensor element to be measured simultaneously using a single frequency based data acquisition system and allowing rapid data collection.

Proceedings Article | 9 March 2013 Paper

Method of creating microscale rapid prototypes using SLM based holographic lithography

Joseph Lawson, Nathan Jenness, Scott Wilson, Robert Clark

Proceedings Volume 8612, 86120L (2013) https://doi.org/10.1117/12.2003164

KEYWORDS: Computer aided design, Spatial light modulators, Holograms, Holography, Lithography, Phase shift keying, 3D modeling, Photomasks, Optical design, Modulation

Read Abstract +

A method of generating arbitrary structures using spatial light modulator (SLM) based holograms with multiphoton absorption is presented. Current methodologies for designing 3D prototyping, such as G-code, are not ideally suited for holographic lithography and therefore limit its functionality or requires additional complex processing. The process outlined here allows a microstructure to be fabricated based on designs from commercially available CAD software. CAD software enables the microstructures to be designed and then realized using dynamic holographic lithography methods enabling designers a simple, quick, and robust method of fabricating novel microstructures. Holographic patterning routines such as raster scans of one or multiple focal points, holograms encoded with two or three dimensional spatial information, or a combination of both techniques may be utilized with this methodology. The process described allows for the development of complex structures that would be difficult to otherwise program using traditional methods. No limitations are placed on the form or function of the designed components, enabling undercut and interlocking features to be fabricated. This methodology also enables the location and orientation of the structures to be controlled dynamically simplifying the process of creating multi-scaled structures or complex arrays of arbitrary structures. As a proof of concept demonstration, a simple cantilever beam was modeled and fabricated.

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