Electrically Tuning Quasi‐Bound States in the Continuum with Hybrid Graphene‐Silicon Metasurfaces DOI
Ziqiang Cai, X. Zhang, Tushar Sanjay Karnik

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Abstract Metasurfaces have become one of the most prominent research topics in field optics owing to their unprecedented properties and novel applications on an ultrathin platform. By combining graphene with metasurfaces, electrical tunable functions can be achieved fast tuning speed, large modulation depth, broad range. However, efficiency hybrid metasurfaces within short‐wavelength infrared (SWIR) spectrum is typically low because small resonance wavelength shift this In work, through integration silicon that support quasi‐bound states continuum (quasi‐BIC), critical coupling as well transmittance experimentally demonstrated. The substantial even less than 30 nm thanks high quality factor quasi‐BIC metasurfaces. measured using Fourier transform spectroscopy (FTIR) a modified reflective lens improve accuracy, realized utilizing “cut‐and‐stick” method ion gel. At 3.0 µm, change (Δ T = max − min ) depth / reach 22.2% 28.9%, respectively, under bias voltage ranging from −2 +2 V. This work demonstrates effective way SWIR spectrum, which has potential optical modulation, reconfigurable photonic devices, communications.

Language: Английский

Infrared upconversion detection based on two-dimensional material/silicon tunable metasurface heterostructures for telecommunication DOI

Yuyang Ye,

Xin Hu, Yiwei Li

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(11)

Published: March 1, 2025

We introduce a heterostructure integrating two-dimensional nonlinear GaSe film on silicon metasurface supporting quasi-bound states in the continuum (BIC) mode, to enhance sum-frequency generation (SFG) process film, where incoming shortwave infrared (SWIR) photons are upconverted visible photons. The wavelength selectivity corresponding different configurations enables film/silicon tunable have response range of 1500–1630 nm, covering telecommunication C and L bands. spectrum is derived from dual resonance structure, pump light signal correspond resonances structure. high quality-factor brought by greatly improves density electromagnetic field near thus improving conversion efficiency film. introduced designed band, while located that can be directly detected detector. low noise level detector guarantee sensitivity detection light. results indicate upconversion attained peak detectivity 1.4 × 1012 Jones at 1555.1 comparable commercial broadband InGaAs detectors (Thorlabs).

Language: Английский

Citations

0
Free-space high-Q nanophotonics DOI Creative Commons

Jianbo Yu,

Wenzhe Yao,

Min Qiu

et al.

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: April 27, 2025

Abstract High-Q nanophotonic devices hold great importance in both fundamental research and engineering applications. Their ability to provide high spectral resolution enhanced light-matter interactions makes them promising various fields such as sensing, filters, lasing, nonlinear optics, photodetection, coherent thermal emission, laser stealth. While Q-factors large 10 9 have been achieved experimentally on-chip microresonators, these modes are excited through near-field coupling of optical fibers. Exciting high-Q via free-space light presents a significant challenge primarily due the larger fabrication area more lossy channels associated with devices. This Review provides comprehensive overview methods employed achieve modes, highlights recent progress applications, discusses existing challenges well prospects field nanophotonics.

Language: Английский

Citations

0
Dynamic Tuning of High-Q quasi-Bound States in the Continuum Driven by Liquid Crystal DOI Open Access

YANG Fei,

ZHANG Binglin,

SHENG Miaomiao

et al.

Acta Physica Sinica, Journal Year: 2025, Volume and Issue: 74(14), P. 0 - 0

Published: Jan. 1, 2025

Optical systems based on Bound States in the Continuum (BIC) generally possess higher Quality Factors (<i>Q</i>) and narrower operational linewidths compared with traditional photonic crystals or metasurfaces. The <i>Q</i> values offer extensive possibilities for high-performance optoelectronic devices. However, often pose challenges practical applications, as fabrication errors during production inevitably lead to discrepancies between real optical devices their ideal designs, which resulting mismatches actual operating wavelengths. To address this issue, we explore dynamic tuning effect of liquid crystal (LC) quasi-Bound (q-BIC), aiming compensate wavelength shifts caused by errors. A slab cross-shaped holes serves platform generating q-BIC. Compared modulation induced tilt angles incident light q-BIC, LC has a lesser impact system's factor when shifting same wavelength. For instance, shift central <i>λ<sub>0</sub> </i>of q-BIC 5.32 nm using tilted angle results reduction up 75.84% (from 3809.05 920.28). Whereas <i>λ<sub>0</sub></i>by 5.63 through <i>θ</i> leads an increase 14.27% 4352.65). This demonstrates significant potential high-<i>Q</i> ultra-narrowband Finally, mechanism within system is discussed. smaller attributed its minimal disruption symmetry. Although also affects symmetry holes, after adjusting asymmetry parameters system, process can be well matched. our research provides valuable references related

Language: Английский

Citations

0
Electrically Tuning Quasi‐Bound States in the Continuum with Hybrid Graphene‐Silicon Metasurfaces DOI
Ziqiang Cai, X. Zhang, Tushar Sanjay Karnik

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Abstract Metasurfaces have become one of the most prominent research topics in field optics owing to their unprecedented properties and novel applications on an ultrathin platform. By combining graphene with metasurfaces, electrical tunable functions can be achieved fast tuning speed, large modulation depth, broad range. However, efficiency hybrid metasurfaces within short‐wavelength infrared (SWIR) spectrum is typically low because small resonance wavelength shift this In work, through integration silicon that support quasi‐bound states continuum (quasi‐BIC), critical coupling as well transmittance experimentally demonstrated. The substantial even less than 30 nm thanks high quality factor quasi‐BIC metasurfaces. measured using Fourier transform spectroscopy (FTIR) a modified reflective lens improve accuracy, realized utilizing “cut‐and‐stick” method ion gel. At 3.0 µm, change (Δ T = max − min ) depth / reach 22.2% 28.9%, respectively, under bias voltage ranging from −2 +2 V. This work demonstrates effective way SWIR spectrum, which has potential optical modulation, reconfigurable photonic devices, communications.

Language: Английский

Citations

1