Lithography-free IR polarization converters via orthogonal in-plane phonons in α-MoO3 flakes

AbstractExploiting polaritons in natural vdW materials has been successful in achieving extreme light confinement and low-loss optical devices and enabling simplified device integration. Recently, α-MoO3 has been reported as a semiconducting biaxial vdW material capable of sustaining naturally orthogonal in-plane phonon polariton modes in IR. In this study, we investigate the polarization-dependent optical characteristics of cavities formed using α-MoO3 to extend the degrees of freedom in the design of IR photonic components exploiting the in-plane anisotropy of this material. Polarization-dependent absorption over 80% in a multilayer Fabry-Perot structure with α-MoO3 is reported without the need for nanoscale fabrication on the α-MoO3. We observe coupling between the α-MoO3 optical phonons and the Fabry-Perot cavity resonances. Using cross-polarized reflectance spectroscopy we show that the strong birefringence results in 15% of the total power converted into the orthogonal polarization with respect to incident wave. These findings can open new avenues in the quest for polarization filters and low-loss, integrated planar IR photonics and in dictating polarization control.

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Edge-oriented and steerable hyperbolic polaritons in anisotropic van der Waals nanocavities

Nature Communications ◽

10.1038/s41467-020-19913-4 ◽

2020 ◽

Vol 11 (1) ◽

Author(s):

Zhigao Dai ◽

Guangwei Hu ◽

Guangyuan Si ◽

Qingdong Ou ◽

Qing Zhang ◽

...

Keyword(s):

Figure Of Merit ◽

Degrees Of Freedom ◽

Optical Axis ◽

Hexagonal Boron Nitride ◽

Van Der Waals ◽

Real Space ◽

Crystallographic Direction ◽

Tuning Parameter ◽

Low Loss ◽

Plane Anisotropy

AbstractHighly confined and low-loss polaritons are known to propagate isotropically over graphene and hexagonal boron nitride in the plane, leaving limited degrees of freedom in manipulating light at the nanoscale. The emerging family of biaxial van der Waals materials, such as α-MoO3 and V2O5, support exotic polariton propagation, as their auxiliary optical axis is in the plane. Here, exploiting this strong in-plane anisotropy, we report edge-tailored hyperbolic polaritons in patterned α-MoO3 nanocavities via real-space nanoimaging. We find that the angle between the edge orientation and the crystallographic direction significantly affects the optical response, and can serve as a key tuning parameter in tailoring the polaritonic patterns. By shaping α-MoO3 nanocavities with different geometries, we observe edge-oriented and steerable hyperbolic polaritons as well as forbidden zones where the polaritons detour. The lifetime and figure of merit of the hyperbolic polaritons can be regulated by the edge aspect ratio of nanocavity.

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Interference and Coherence

Modern Optics Simplified ◽

10.1093/oso/9780198842859.003.0004 ◽

2019 ◽

pp. 92-158

Author(s):

B. D. Guenther

Keyword(s):

Optical Feedback ◽

Superposition Principle ◽

Michelson Interferometer ◽

Orthogonal Polarization ◽

Antireflection Coatings ◽

Multiple Reflections ◽

Optical Coherence Imaging ◽

Fabry Perot ◽

Coherence Imaging ◽

The Waves

The superposition principle states that the sum of solutions of the wave equation is also a solution. Linearity forbids scattering of one photon by another and waves with orthogonal polarization will not interfer and if no interference is observed the light is said to be incoherent. There is no record carried by any of the waves to indicate outside of the overlap region that the waves ever commingled. Interference involve dielectric layers can produce antireflection coatings. Michelson interferometer, temporal coherence and its use in spectroscopy. The interferometer coupled with a light source with well defined coherence properties are currently used in optical coherence imaging. With multiple reflections a Fabry Perot interferometer can be created to provide optical feedback in a laser. Young’s two slits interferometer can be used to measure the size of distant stars.

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W-band measurements of low-loss dielectrics with a Fabry-Perot Open Resonator

2019 IEEE MTT-S International Microwave Symposium (IMS) ◽

10.1109/mwsym.2019.8700981 ◽

2019 ◽

Cited By ~ 2

Author(s):

T. Karpisz ◽

B. Salski ◽

P. Kopyt ◽

J. Krupka

Keyword(s):

Open Resonator ◽

Low Loss ◽

W Band ◽

Fabry Perot

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A Simple and Reliable Dye Laser System for Spectroscopic Investigations

Zeitschrift für Naturforschung A ◽

10.1515/zna-1972-0410 ◽

1972 ◽

Vol 27 (4) ◽

pp. 601-604b ◽

Cited By ~ 24

Author(s):

J. Kühl ◽

G. Marowksy ◽

P. Kunstmann ◽

W. Schmidt

Keyword(s):

Spectral Density ◽

Narrow Band ◽

Laser System ◽

Interference Filter ◽

Dye Laser ◽

Quartz Plate ◽

Simple System ◽

Low Loss ◽

Spectral Narrowing ◽

Fabry Perot

Abstract Efficient spectral narrowing and accurately reproducible tuning of a dye laser has been achieved by the combination of a low-loss narrow-band interference filter and a solid-quartz-plate-Fabry-Perot-etalon. Bandwidths as small as 5-10-3 Å were obtained by this simple system increasing the spectral density by a factor of at least 2 · 103.

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Large-area, flexible, full-color printings based on asymmetry Fabry–Perot cavity resonances

Optics Communications ◽

10.1016/j.optcom.2020.125483 ◽

2020 ◽

Vol 464 ◽

pp. 125483

Author(s):

Yanfeng Su ◽

Xinyue Tang ◽

Guanhua Huang ◽

Peng Zhang

Keyword(s):

Large Area ◽

Full Color ◽

Fabry Perot ◽

Cavity Resonances

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A Study of Control Strategies for the Reduction of Structural Vibration Transmission

Journal of Vibration and Acoustics ◽

10.1115/1.2894006 ◽

1999 ◽

Vol 121 (4) ◽

pp. 482-487 ◽

Cited By ~ 4

Author(s):

P. Gardonio ◽

S. J. Elliott

Keyword(s):

Kinetic Energy ◽

Degrees Of Freedom ◽

Control Strategies ◽

Structural Vibration ◽

Total Power ◽

Vibration Transmission ◽

Active Isolation ◽

Axial Forces ◽

Common Framework ◽

Base Structure

A theoretical study of the active control of structural vibration transmission in a multiple isolator system comprising a piece of equipment mounted on a base structure via active mounts is presented. Two types of problem have been studied with a common framework: first, the active isolation of vibration transmission from the equipment to the base structure and, second, the active isolation of vibration transmission from the base structure to the equipment. Four different control strategies using the measured axial velocity or/and axial force underneath or at the top of the mounts have been investigated and compared with the effectiveness of the reference control approaches of minimizing the total power transmitted from the equipment to the flexible base structure or minimizing the total kinetic energy of the suspended rigid equipment when driven by the base structure. For the first type of isolation problem the best control is achieved when a cost function which minimizes the weighted mm of the square values of the axial velocities and axial forces is implemented. For the second isolation problem the best control performance is given by the minimization of an estimate of the kinetic energy of the suspended equipment related to the translational degrees of freedom.

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Metallic Carbon Nanotube Nanocavities as Ultracompact and Low-loss Fabry–Perot Plasmonic Resonators

Nano Letters ◽

10.1021/acs.nanolett.0c00315 ◽

2020 ◽

Vol 20 (4) ◽

pp. 2695-2702 ◽

Cited By ~ 1

Author(s):

Sheng Wang ◽

Fanqi Wu ◽

Kenji Watanabe ◽

Takashi Taniguchi ◽

Chongwu Zhou ◽

...

Keyword(s):

Carbon Nanotube ◽

Low Loss ◽

Fabry Perot

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Effect of orthogonal polarization control plate on polarization property of focus speckle

High Power Laser and Particle Beams ◽

10.3788/hplpb20142603.32008 ◽

2014 ◽

Vol 26 (3) ◽

pp. 32008

Author(s):

李泽龙 Li Zelong ◽

钟哲强 Zhong Zheqiang ◽

张彬 Zhang Bin

Keyword(s):

Polarization Property ◽

Orthogonal Polarization ◽

Polarization Control ◽

Control Plate

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CONTROL OF THE ENERGY TRANSFER WITH THE OPTICAL MICROCAVITY

International Journal of Modern Physics B ◽

10.1142/s0217979201008470 ◽

2001 ◽

Vol 15 (28n30) ◽

pp. 3704-3708 ◽

Cited By ~ 3

Author(s):

M. HOPMEIER ◽

W. GUSS ◽

M. DEUSSEN ◽

E. O. GÖBEL ◽

R. F. MAHRT

Keyword(s):

Energy Transfer ◽

Excitation Energy Transfer ◽

Interaction Strength ◽

Dipole Interaction ◽

Resonant Mode ◽

Phenylene Vinylene ◽

Spectral Position ◽

Optical Microcavity ◽

Fabry Perot ◽

Cavity Resonances

We present the first experimental observation that dipole-dipole interaction can be strongly enhanced by placing the system in a microcavity. We have studied the excitation energy transfer in poly(phenyl-p-phenylene vinylene) (PPPV) doped with DCM molecules, placed within a Fabry-Perot resonator. As the spectral position of the cavity resonant mode in tuned across the DCM absorption profile, the transfer efficiency from PPPV to DCM changes dramatically as revealed by photoluminescence (PL) spectra. This behavior is clear evidence for the increase of the dipole-dipole interaction strength at the cavity resonances mediated by propagating modes emitted from the excited dipoles.

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