The Electro-Optic Effect in Uniaxial Crystals of the Type X H2PO4. I. Theoretical

Billings, Bruce H.

doi:10.1016/b978-0-12-395050-5.50011-8

Cited by 5 publications

(5 citation statements)

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“…The experimentally obtained MM elements, given in Fig. 6(a) and (b) clearly indicate the appearance of biaxiality in the KDP crystal, a hitherto less known and investigated crystal structure to be reported at room temperature 38 , 39 . We identify from the MM elements that the KDP crystal for and respectively belong to the orthorhombic and monoclinic biaxial crystal structures of lower symmetry 40 .…”

Section: Resultsmentioning

confidence: 68%

“…These results are considered as strong evidence for the presence of circular birefringence in the biaxial crystal and hence the SHEL, in response to the symmetry-breaking due to the applied electric field. An overall tilt of 45° in the pattern may be attributed to the electro-gyration effect 38 , 41 arising due to the field induced crystal asymmetry and will be detailed elsewhere.…”

Section: Resultsmentioning

confidence: 95%

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Field-controllable Spin-Hall Effect of Light in Optical Crystals: A Conoscopic Mueller Matrix Analysis

Samlan

Viswanathan

2018

Sci Rep

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Electric-field applied perpendicular to the direction of propagation of paraxial beam through an optical crystal dynamically modifies the spin-orbit interaction (SOI), leading to the demonstration of controllable spin-Hall effect of light (SHEL). The electro- and piezo-optic effects of the crystal modifies the radially symmetric spatial variation in the fast-axis orientation of the crystal, resulting in a complex pattern with different topologies due to the symmetry-breaking effect of the applied field. This introduces spatially-varying Pancharatnam-Berry type geometric phase on to the paraxial beam of light, leading to the observation of SHEL in addition to the spin-to-vortex conversion. A wave-vector resolved conoscopic Mueller matrix measurement and analysis provides a first glimpse of the SHEL in the biaxial crystal, identified via the appearance of weak circular birefringence. The emergence of field-controllable fast-axis orientation of the crystal and the resulting SHEL provides a new degree of freedom for affecting and controlling the spin and orbital angular momentum of photons to unravel the rich underlying physics of optical crystals and aid in the development of active photonic spin-Hall devices.

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Section: Resultsmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 95%

Field-controllable Spin-Hall Effect of Light in Optical Crystals: A Conoscopic Mueller Matrix Analysis

Samlan

Viswanathan

2018

Sci Rep

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“…It is important to point out here that the change in induced birefringence due to transverse electrooptic effect in KDP crystal is orders of magnitude smaller than its longitudinal counterpart 45 . Nevertheless, our CFFA technique is sufficiently sensitive to map the crystal’s transition from uniaxial-to-biaxial and rotation of the singularity axes plane by 45° due to associated optical activity 45 46 . The crystal is uniaxial, with zero retardation, only for light traveling along the OA and when the applied voltage is zero.…”

Section: Resultsmentioning

confidence: 92%

Isogyres – Manifestation of Spin-orbit interaction in uniaxial crystal: A closed-fringe Fourier analysis of conoscopic interference

Samlan

Naik

Viswanathan

2016

Sci Rep

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Discovered in 1813, the conoscopic interference pattern observed due to light propagating through a crystal, kept between crossed polarizers, shows isochromates and isogyres, respectively containing information about the dynamic and geometric phase acquired by the beam. We propose and demonstrate a closed-fringe Fourier analysis method to disentangle the isogyres from the isochromates, leading us to the azimuthally varying geometric phase and its manifestation as isogyres. This azimuthally varying geometric phase is shown to be the underlying mechanism for the spin-to-orbital angular momentum conversion observed in a diverging optical field propagating through a z-cut uniaxial crystal. We extend the formalism to study the optical activity mediated uniaxial-to-biaxial transformation due to a weak transverse electric field applied across the crystal. Closely associated with the phase and polarization singularities of the optical field, the formalism enables us to understand crystal optics in a new way, paving the way to anticipate several emerging phenomena.

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“…crystal is a tetragonal crystal with 42 m symmetry, uniaxial with the optical axis along the axis, z, of the tetragon. 34 When an electric field || E is applied along the crystallographic axis z, the symmetry of the crystal is …”

Section: The Kdp Longitudinal Electrooptic Modulator Its Device Omentioning

confidence: 99%

Time-varying polarization devices: vectorial Pauli algebraic approach

Tudor

2009

SPIE Proceedings

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The Electro-Optic Effect in Uniaxial Crystals of the Type X H2PO4. I. Theoretical

Cited by 5 publications

References 0 publications

Field-controllable Spin-Hall Effect of Light in Optical Crystals: A Conoscopic Mueller Matrix Analysis

Field-controllable Spin-Hall Effect of Light in Optical Crystals: A Conoscopic Mueller Matrix Analysis

Isogyres – Manifestation of Spin-orbit interaction in uniaxial crystal: A closed-fringe Fourier analysis of conoscopic interference

Time-varying polarization devices: vectorial Pauli algebraic approach

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