| Autor: |
Nixon, Micha, Katz, Ori, Small, Eran, Bromberg, Yaron, Friesem, Asher A., Silberberg, Yaron, Davidson, Nir |
| Rok vydání: |
2013 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/nphoton.2013.248 |
| Popis: |
Focusing light through dynamically varying heterogeneous media is a sought-after goal with important applications ranging from free-space communication to nano-surgery. The underlying challenge is to control the optical wavefront with a large number of degrees-of-freedom (DOF) at timescales shorter than the medium dynamics. Recently, many advancements have been reported following the demonstration of focusing through turbid samples by wavefront-shaping, using spatial light modulators (SLMs) having >1000 DOF. Unfortunately, SLM-based wavefront-shaping requires feedback from a detector/camera and is limited to slowly-varying samples. Here, we demonstrate a novel approach for wavefront-shaping using all-optical feedback. We show that the complex wavefront required to focus through highly scattering samples, including thin biological tissues, can be generated at sub-microsecond timescales by the process of field self-organization inside a multimode laser cavity, without requiring electronic feedback or SLMs. This wavefront-shaping mechanism is more than five orders of magnitude faster than state-of-the-art, reaching the timescales required in many applications. |
| Databáze: |
arXiv |
| Externí odkaz: |
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