Spin-Orbit Mapping of Light

Fang, Liang; Wang, Hongya; Liang, Yize; Cao, Han; Wang, Jian

doi:10.1103/physrevlett.127.233901

Cited by 27 publications

(11 citation statements)

References 58 publications

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“…This result might be induced by the plenty of spin-orbit interaction of light in the OF. [34] The AS-tuned random lasing is used as the illumination source to demonstrates their potential in microscopic imaging system for the biological sample including phloem, xylem, and pith. When the obtained random lasing (Mode 2) is used as an illumination source, clear images of the whole biology object with random phase modulation are obtained with sharp cell boundaries and detail information (Figure S6a-d, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Angular Spectra Tunable Random Lasing for High Contrast Imaging

Shen

Yuan

Bian

et al. 2023

Advanced Physics Research

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Random lasers with low spatial coherence have important potential applications in speckle‐free imaging and displaying. Here, an angular spectra (AS) tunable random laser is proposed through directly coupling a microcavity with a commercial optical fiber. The local in‐plane AS distributions of the random lasing can be separately tuned by selectively using coupling filtering, free transmission, and intensity modulation. The obtained random lasing has the characteristics of non‐polarization and ring AS with distribution tunability. The unique properties endow the lasing as a promising illumination source for biological imaging. An excellent image with speckle‐free and high contrast is thus achieved with a maximal contrast improvement factor of 638% relative to that under the common white lighting. The results indicate that the designed AS‐tunable random laser has great application values in the fields of biological imaging, display, integration optics, and optical physics.

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Section: Resultsmentioning

confidence: 99%

Angular Spectra Tunable Random Lasing for High Contrast Imaging

Shen

Yuan

Bian

et al. 2023

Advanced Physics Research

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“…Equation (8) indicates that the transmitted transverse shift might be zero and polarization-independent, irrespective of the incident angle. Such an exotic transmitted phenomenon of the photonic spin Hall effect has never been reported before, partly because the transverse shift for the photonic spin Hall effect is small but generally nonzero in previous works.…”

Section: Exotic Transmitted Transverse Shiftmentioning

confidence: 99%

“…The photonic spin Hall effect originates from the spin–orbit coupling of light. [ 1–10 ] This effect can be quantitatively characterized by a spin‐dependent transverse shift, namely, the transverse splitting of left‐ and right‐handed circularly polarized components of the light beam during the reflection and transmission processes. [ 11–17 ] The measurement of this spin‐dependent transverse shift is of fundamental importance to many applications, including spin‐based nanophotonic devices, [ 1,18–23 ] on‐chip information processing, [ 2,14 ] precision metrology, [ 24–27 ] and optical sensing.…”

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confidence: 99%

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Exotic Photonic Spin Hall Effect from a Chiral Interface

Sheng

Zhou

Zhong

et al. 2022

Laser & Photonics Reviews

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The photonic spin Hall effect provides a quantitative way to characterize the spin–orbit interaction of light and enables many applications, such as the precise metrology, since this effect is featured with a spin‐dependent transverse shift of the light beam. This transverse shift is generally nonzero during the reflection/transmission process, and it is sensitive to the polarization and the incident angle of the light beam. By contrast, here it is revealed that for the transmitted light, the transverse shift can be always zero and polarization‐independent, irrespective of the incident angle. The underlying mechanism is that the conversion between the spin and orbit angular momenta of light is fully suppressed during the transmission process. Such an exotic photonic spin Hall effect occurs, if tpp=tss${t^{{\rm{pp}}}} = {t^{{\rm{ss}}}}$, tps=−tsp${t^{{\rm{ps}}}} = - {t^{{\rm{sp}}}}$, and θt=θi${\theta _t} = {\theta _i}$, where t stands for the transmission coefficient and its first (second) superscript represents the polarization of the transmitted (incident) light, and θt${\theta _t}$ (θi${\theta _i}$) is the transmitted (incident) angle. These transmission conditions are achievable, e.g., by exploiting an interface only with a chiral surface conductivity. Similarly, a polarization‐independent photonic spin Hall effect is revealed for the reflected light.

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“…Thirty years have passed since they were recognized in light waves, [ 1 ] meantime, they have undergone a fast development to serve as a useful tool in science and engineering. [ 2–23 ] The OAM is of great interest in optical communications, [ 12–23 ] because different OAM modes with different topological charges l can serve as a set of orthogonal bases for multiplexing communications, which are also perfectly stackable with well‐established wavelength‐division multiplexing (WDM) and polarization‐division multiplexing (PDM) techniques. As a result, using OAM modes can greatly enhance the channel capacity of communication systems.…”

Section: Introductionmentioning

confidence: 99%

Efficient Dense Orbital Angular Momentum Demultiplexing Enabled by Quasi‐Wavelet Conformal Mapping

Cao

Liang

Wang

et al. 2023

Laser & Photonics Reviews

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Orbital angular momentum (OAM) has recently attracted increasing interest in optical communications for capacity scaling by OAM mode‐division multiplexing (MDM). OAM (de)multiplexer is crucial to the success of OAM‐MDM communications. Scalable and efficient dense OAM demultiplexing is highly desired, but full of challenges. Here, a quasi‐wavelet conformal mapping method is proposed and demonstrated to implement scalable and efficient dense OAM demultiplexing. The OAM mode is divided at the input plane into multiple concentric rings, which are mapped to multiple tilted plane waves and arranged side by side in a line. The engineered transformed light beams with periodic extension and increased length enable narrow focused spot width, reduced beam overlap, and suppressed demultiplexing crosstalk. The quasi‐wavelet conformal mapping method is compared with conventional log‐polar transformation scheme and hybrid log‐polar and fan‐out technique, and the crosstalk matrix for OAM demultiplexing is measured. Efficient OAM demultiplexing is demonstrated for 15 OAM modes (OAM−7 to OAM+7) with a maximum crosstalk of −12.1 dB in the experiment. Moreover, the method is also applied to system‐level data‐carrying OAM‐MDM communications with favorable performance. The demonstrated quasi‐wavelet conformal mapping method may pave the way for future ultrahigh capacity dense OAM‐MDM communications with a large number of OAM modes.

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Spin-Orbit Mapping of Light

Cited by 27 publications

References 58 publications

Angular Spectra Tunable Random Lasing for High Contrast Imaging

Angular Spectra Tunable Random Lasing for High Contrast Imaging

Exotic Photonic Spin Hall Effect from a Chiral Interface

Efficient Dense Orbital Angular Momentum Demultiplexing Enabled by Quasi‐Wavelet Conformal Mapping

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