Optimal wave fields for micromanipulation in complex scattering environments

Horodynski, Michael; Kühmayer, Matthias; Brandstötter, André; Pichler, Kevin; Fyodorov, Yan V.; Kuhl, Ulrich; Rotter, Stefan

doi:10.1038/s41566-019-0550-z

Cited by 63 publications

(59 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Beyond imaging, the information-rich nature of the high-dimensional TM is finding applications in a growing number of areas. Examples include the identification of the principal modes of MMFs to maximise spatial coherence for high-capacity telecom applications 14 , the optimisation of energy delivery inside scattering materials 15 , 16 , the design of optimised optical trapping fields through random scattering systems 17 , 18 , and the creation of new forms of all-optical classical 19 and quantum 20 information processing.…”

Section: Introductionmentioning

confidence: 99%

Compressively sampling the optical transmission matrix of a multimode fibre

Saunders

Lum

et al. 2021

Light Sci Appl

View full text Add to dashboard Cite

The measurement of the optical transmission matrix (TM) of an opaque material is an advanced form of space-variant aberration correction. Beyond imaging, TM-based methods are emerging in a range of fields, including optical communications, micro-manipulation, and computing. In many cases, the TM is very sensitive to perturbations in the configuration of the scattering medium it represents. Therefore, applications often require an up-to-the-minute characterisation of the fragile TM, typically entailing hundreds to thousands of probe measurements. Here, we explore how these measurement requirements can be relaxed using the framework of compressive sensing, in which the incorporation of prior information enables accurate estimation from fewer measurements than the dimensionality of the TM we aim to reconstruct. Examples of such priors include knowledge of a memory effect linking the input and output fields, an approximate model of the optical system, or a recent but degraded TM measurement. We demonstrate this concept by reconstructing the full-size TM of a multimode fibre supporting 754 modes at compression ratios down to ∼5% with good fidelity. We show that in this case, imaging is still possible using TMs reconstructed at compression ratios down to ∼1% (eight probe measurements). This compressive TM sampling strategy is quite general and may be applied to a variety of other scattering samples, including diffusers, thin layers of tissue, fibre optics of any refractive profile, and reflections from opaque walls. These approaches offer a route towards the measurement of high-dimensional TMs either quickly or with access to limited numbers of measurements.

show abstract

Section: Introductionmentioning

confidence: 99%

Compressively sampling the optical transmission matrix of a multimode fibre

Saunders

Lum

et al. 2021

Light Sci Appl

View full text Add to dashboard Cite

show abstract

“…To circumvent the need for direct field measurements, a number of proposals indirectly obtain this information by implanting a guide‐star at the target location, [ 19,20 ] by creating a virtual guide‐star with multi‐wave approaches, [ 21,22 ] by relying on a non‐linear response at the target position [ 23,24 ] or on a parametric variation of the target. [ 25–28 ]…”

Section: Introductionmentioning

confidence: 99%

“…[ 4 ] Note that our blind and non‐invasive approach sharply differs from refs. [27, 28] which leverage a generalized version of the Wigner–Smith operator in which the frequency is replaced by a local parameter of the target (position, orientation, refractive index, …) that has to be altered in situ to determine the wavefront to be injected. Here, we begin by theoretically proving the optimality of injecting the first time‐delay eigenstate to couple waves to a resonator embedded within a scattering medium.…”

Section: Introductionmentioning

confidence: 99%

Experimental Realization of Optimal Energy Storage in Resonators Embedded in Scattering Media

Hougne

Sobry

Legrand

et al. 2021

Laser & Photonics Reviews

Self Cite

View full text Add to dashboard Cite

The ability to enhance light–matter interactions by increasing the energy stored in optical resonators is inherently dependent on the resonators' coupling to the incident wavefront. In practice, weak coupling may result from resonators' irregular shapes and/or the scrambling of waves in the surrounding scattering environment. Here, a blind and non‐invasive wavefront shaping technique providing optimal coupling to resonators is presented. The coherent control of the incident wavefront relies on the lengthening of delay times of waves efficiently exciting the resonator. Using a modal approach, the optimality of the proposed technique is proven and its limitations are quantified. The proposed concept is demonstrated in microwave experiments by injecting in situ optimal wavefronts that maximize the energy stored in high‐permittivity dielectric scatterers and extended leaky cavities embedded in a complex environment. The introduced framework is expected to find important applications in the enhancement of light–matter interactions in photonic materials as well as to enhance energy harvesting.

show abstract

“…All these beams are based on solutions of Helmholtz wave equation in different coordinates systems, respectively. Due to its intrinsic nature, the non-diffraction beams have many applications e.g., micro particles manipulating, optical tweezer [6,7], nonlinear optics [8,9], and communications [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Experimental Generation of Quasi-Zero-Order Mathieu-Gauss Beams via Diffractive Elements in THz Domain

et al. 2021

View full text Add to dashboard Cite

We first demonstrate the Terahertz quasi-zero-order Mathieu-Gaussian beams with a 0.1-THz continuous wave. To generate these beams, two diffractive elements, a cylindrical lens and an axicon bearing specific phases are fabricated via 3D printing technology. The related numerical simulations are conducted to study intensity distributions and properties on non-diffraction and self-healing of THz quasi-zero-order Mathieu beams in free space. Experimental results are in good agreement with numerical ones. Based on the characteristic of terahertz Mathieu beams, they can be applied to terahertz linear array imaging system and terahertz communication.

show abstract

Optimal wave fields for micromanipulation in complex scattering environments

Cited by 63 publications

References 42 publications

Compressively sampling the optical transmission matrix of a multimode fibre

Compressively sampling the optical transmission matrix of a multimode fibre

Experimental Realization of Optimal Energy Storage in Resonators Embedded in Scattering Media

Experimental Generation of Quasi-Zero-Order Mathieu-Gauss Beams via Diffractive Elements in THz Domain

Contact Info

Product

Resources

About