One-Wave Optical Phase Conjugation Mirror by Actively Coupling Arbitrary Light Fields into a Single-Mode Reflector

Lee, KyeoReh; Lee, Junsung; Park, Jung Hoon; Park, Ji-Ho; Park, Yong Keun

doi:10.1103/physrevlett.115.153902

Cited by 38 publications

(23 citation statements)

References 41 publications

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“…The maximum EF in our study is comparable to the state-of-art result of 120,000 exhibited by the DOPC system [35]. Furthermore, the proposed approach can also be implemented in phase conjugation experiments [14]. A possible further improvement in the proposed system would be to increase the speed of optimization.…”

Section: Discussionsupporting

confidence: 75%

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Ultrahigh enhancement of light focusing through disordered media controlled by mega-pixel modes

Yu¹,

Lee²,

Park³

2017

Opt. Express

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We propose and demonstrate a system for wavefront shaping, which generates optical foci through complex disordered media and achieves an enhancement factor of greater than 100,000. To exploit the 1 megapixel capacity of a digital micro-mirror device and its fast frame rate, we developed a fast and efficient method to handle the heavy matrix algebra computation involved in optimizing the focus. We achieved an average enhancement factor of 101,391 within an optimization time of 73 minutes with amplitude control. This unprecedented enhancement factor may open new possibilities for realistic image projection and the efficient delivery of energy through scattering media.

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Section: Discussionsupporting

confidence: 75%

“…Deformable mirrors (DM) also provide phase modulation at fast frame rates. However, the total number of pixels in the DM is limited to thousands [14,32,33]. While commercially available LCoS SLMs and DMDs provide 0.4 to 12.0 megapixels, only a small portion of the pixels were used in previous experiments.…”

Section: Principlesmentioning

confidence: 99%

Ultrahigh enhancement of light focusing through disordered media controlled by mega-pixel modes

Yu¹,

Lee²,

Park³

2017

Opt. Express

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“…It implies that the mesenteric adipose tissue in the present research suffers at least 2−3 light scattering events. For thicker tissues in which multiple light scattering events can occur 26 , we expect that the transmission matrixes (TMs) [51][52][53] or optical phase conjugation approaches [54][55][56] need to be utilized. This may further expand the applications of QPI to intravital imaging fields including tumour biology, neurovascular, and cardiovascular biology.…”

Section: Discussionmentioning

confidence: 99%

Holographic intravital microscopy for 2-D and 3-D imaging intact circulating blood cells in microcapillaries of live mice

Choe

Park

et al. 2016

Sci Rep

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Intravital microscopy is an essential tool that reveals behaviours of live cells under conditions close to natural physiological states. So far, although various approaches for imaging cells in vivo have been proposed, most require the use of labelling and also provide only qualitative imaging information. Holographic imaging approach based on measuring the refractive index distributions of cells, however, circumvent these problems and offer quantitative and label-free imaging capability. Here, we demonstrate in vivo two- and three-dimensional holographic imaging of circulating blood cells in intact microcapillaries of live mice. The measured refractive index distributions of blood cells provide morphological and biochemical properties including three-dimensional cell shape, haemoglobin concentration, and haemoglobin contents at the individual cell level. With the present method, alterations in blood flow dynamics in live healthy and sepsis-model mice were also investigated.

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“…[23][24][25] Once the optimal wavefront is found, it can be recorded to a holographic film in order to be used as a stand-alone optical element.…”

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confidence: 99%

Scattering Optical Elements: Stand-Alone Optical Elements Exploiting Multiple Light Scattering

Park¹,

Cho

Park³

et al. 2016

ACS Nano

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Optical design and fabrication techniques are crucial for making optical elements. From conventional lenses to diffractive optical elements and to recent metasurfaces, various types of optical elements have been proposed to manipulate light where optical materials are fabricated into desired structures. Here, we propose a scattering optical element (SOE) that exploits multiple light scattering and wavefront shaping. Instead of fabricating optical materials, the SOE consists of a disordered medium and a photopolymer-based wavefront recorder, with shapes impinging on light on demand. With the proposed stand-alone SOEs, we experimentally demonstrate control of various properties of light, including intensity, polarization, spectral frequency, and near field. Due to the tremendous freedom brought about by disordered media, the proposed approach will provide unexplored routes to manipulate arbitrary optical fields in stand-alone optical elements.

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One-Wave Optical Phase Conjugation Mirror by Actively Coupling Arbitrary Light Fields into a Single-Mode Reflector

Cited by 38 publications

References 41 publications

Ultrahigh enhancement of light focusing through disordered media controlled by mega-pixel modes

Ultrahigh enhancement of light focusing through disordered media controlled by mega-pixel modes

Holographic intravital microscopy for 2-D and 3-D imaging intact circulating blood cells in microcapillaries of live mice

Scattering Optical Elements: Stand-Alone Optical Elements Exploiting Multiple Light Scattering

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