Light guiding with photoacoustically generated ultrasound

Mateu Colom; Pietro Ricci; Blanca Mestre-Torà; Martí Duocastella

doi:10.1117/12.3025218

19 June 2024 Light guiding with photoacoustically generated ultrasound

Mateu Colom, Pietro Ricci, Blanca Mestre-Torà, Martí Duocastella

Proceedings Volume PC13010, Tissue Optics and Photonics III; PC130100P (2024) https://doi.org/10.1117/12.3025218
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

The guiding or focusing of light, crucial in many applications, often relies on bulky optical elements that are difficult to place in delicate mediums like biological tissue. In current systems, the optical components are located outside the sample, limiting possibilities due to geometric constraints. Scattering further complicates the control of light within non-homogeneous media, restricting operating beyond 1 mm of depth. A promising solution involves shaped ultrasound to induce refractive index gradients within the tissue, acting as embedded lenses or waveguides. However, existing methods rely on bulky ultrasonic transducers, introducing invasiveness and fixing the ultrasound geometry. The proposed approach uses photoacoustic generation of pressure waves within the medium, allowing light guiding without geometrical constraints. As it is successfully demonstrated in tissue phantoms with different scattering coefficients, this method offers a promising solution in conditions not feasable with traditional external optical elements.

Citation Download Citation

Mateu Colom, Pietro Ricci, Blanca Mestre-Torà, and Martí Duocastella "Light guiding with photoacoustically generated ultrasound", Proc. SPIE PC13010, Tissue Optics and Photonics III, PC130100P (19 June 2024); https://doi.org/10.1117/12.3025218

ACCESS THE FULL ARTICLE

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