Nonlinear symmetry breaking in photometamaterials

Gorlach, Maxim A.; Dobrykh, Dmitry; Slobozhanyuk, Alexey P.; Belov, Pavel A.; Lapine, Mikhail

doi:10.1103/physrevb.97.115119

Cited by 7 publications

(6 citation statements)

References 27 publications

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“…Our argument was made for metasurfaces with just a few types of single particles in a unit cell. Extending this approach to previous discussions on other shapes or composite metaatoms [19][20][21][22][23][24][25][26] may help generalunderstanding of SHG in metaatoms.…”

Section: Discussionmentioning

confidence: 92%

The role of nonlocal response in second harmonic generation at metasurfaces with triangular metaatoms

Habibullah

Ishihara

2022

EPJ Appl. Metamat.

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Metasurface consisting of square array of obtuse isosceles triangle metaatoms is found to exhibit much more efficient second harmonic generation (SHG) compared to that of split ring resonators and its heptagonal modification, experimentally as well as numerically. All of them are designed to lack inversion symmetry in horizontal direction but to have vertical symmetry, and to meet the double resonance condition for vertically-polarized fundamental and horizontally-polarized SHG waves. SHG efficiencies were estimated numerically for each structure by evaluating an overlap integral of second order nonlinear polarization and field distribution at the SHG wavelength. The large overlap integral for the triangle metasurface is ascribed to the nonlocal response at the SHG wavelength. Current induced at the center of the triangle near the obtuse angle by horizontally polarized light at SHG wavelength flows toward two corners of acute angles. As a result, polarization charges oscillate in time at the surfaces of two acute corners, which results in strong field oscillation away from the center where the electric field is applied to majority of free electrons. Experimentally observed wavelength dependence of SHG efficiencies for the three metasurfaces are reasonably reproduced by a numerical estimation.

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Section: Discussionmentioning

confidence: 92%

The role of nonlocal response in second harmonic generation at metasurfaces with triangular metaatoms

Habibullah

Ishihara

2022

EPJ Appl. Metamat.

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“…In contrast to wired electrical control scheme, optical control is a non-contact remotely tuning method that provides more possibilities to release these limitations. [84][85][86][87][88][89][90][91][92][93][94][95] Figure 1 shows conceptually the light-controlled programmable metasurfaces, on which microwaves can be controlled and modulated by incident light in real time, offering a multiphysics interface to link light and microwave in space. [96][97][98][99][100][101][102][103][104][105][106][107][108][109][110] Light-microwave interaction is of fundamental important for some emerging fields including microwave photonics 111 and lightwave electronics.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, electrically‐controlled programmable metasurfaces are typically focused only on controlling and processing single‐domain signals (e.g., microwave signals), lacking of processing of multidomain signals across different frequency bands. In contrast to wired electrical control scheme, optical control is a non‐contact remotely tuning method that provides more possibilities to release these limitations 84‐95 . Figure 1 shows conceptually the light‐controlled programmable metasurfaces, on which microwaves can be controlled and modulated by incident light in real time, offering a multiphysics interface to link light and microwave in space 96‐110 .…”

Section: Introductionmentioning

confidence: 99%

A review of light‐controlled programmable metasurfaces for remote microwave control and hybrid signal processing

Zhang

Sun

Huang

et al. 2023

Engineering Reports

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Programmable metamaterials and metasurfaces have gained great interest due to real‐time electromagnetic control and digital information processing capabilities. Different from traditional electrically‐controlled programmable metasurfaces, recently, light‐controlled programmable metasurfaces have been presented, on which the microwaves can be manipulated and modulated wirelessly in the space domain or time domain by incident light. More importantly, such the metasurface platform offers an efficient interface to link directly light and microwave signals, showing huge potential to develop wave‐based optoelectronic hybrid devices and relevant applications. Here, we review some of these recent developments, focusing particularly on the mechanisms of light‐controlled programmable metasurfaces and their fascinating functions from remote microwave control to hybrid signal processing. We survey related implementation methods based on the hybrid integrations of microwave digital metasurfaces and different photoresponsive components including photodiodes, photoresistors, infrared modules, and light sensors, as well as discuss their unique advantages. In the summary, the perspective on the challenges and future directions of light‐controlled programmable metasurfaces are presented.

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“…The band gap in the nonlinear metamaterial can be tuned by a variable capacitance insertion [6]. A photometamaterial with meta-atoms containing both photodiodes and light emitting diodes can show breaking of inversion symmetry at a particular incident wave intensity, which results in the emergence of second harmonic generation [7]. Tunable chirality in photonic metamaterials can be obtained with meta-molecule containing nonlinear nano-Au:polycrystalline indium-tin oxide layer sandwiched between two L-shaped nano-antennas [8].…”

Section: Introductionmentioning

confidence: 99%