title: Slow light for deep tissue imaging with ultrasound modulation.
abstract: Slow light has been extensively studied for applications ranging from optical delay lines to single photon quantum storage. Here, we show that the time delay of slow-light significantly improves the performance of the narrowband spectral filters needed to optically detect ultrasound from deep inside highly scattering tissue. We demonstrate this capability with a 9 cm thick tissue phantom, having 10 cm(-1) reduced scattering coefficient, and achieve an unprecedented background-free signal. Based on the data, we project real time imaging at video rates in even thicker phantoms and possibly deep enough into real tissue for clinical applications like early cancer detection.
authors.forename: Huiliang
authors.initials: H
authors.lastname: Zhang
authors.forename: Mahmood
authors.initials: M
authors.lastname: Sabooni
authors.forename: Lars
authors.initials: L
authors.lastname: Rippe
authors.forename: Chulhong
authors.initials: C
authors.lastname: Kim
authors.forename: Stefan
authors.initials: S
authors.lastname: Kröll
authors.forename: Lihong V
authors.initials: LV
authors.lastname: Wang
authors.forename: Philip R
authors.initials: PR
authors.lastname: Hemmer