Low-Loss Photonic Integrated Elements Based on Bound Bloch Surface Wave in the Continuum

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Haoqi Luo ◽  
Xi Tang ◽  
Yonghua Lu ◽  
Pei Wang
Keyword(s):  
Surface Wave ◽  
Low Loss ◽  
Bloch Surface Wave ◽  
The Continuum

scholarly journals Sensitive THz sensing based on Fano resonance in all-polymeric Bloch surface wave structure

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Chi Zhang ◽  
Qiang Liu ◽  
Xiao Peng ◽  
Zhengbiao Ouyang ◽  
Suling Shen
Keyword(s):  
Surface Wave ◽  
Quality Factor ◽  
Fano Resonance ◽  
Bound States ◽  
High Sensitivity ◽  
Influential Factors ◽  
Destructive Interference ◽  
Optimized Design ◽  
Bloch Surface Wave ◽  
The Continuum

Abstract Simultaneous realization of high quality factor (Q), sensitivity, and figure of merit (FOM) play a pivotal role in building the THz sensor. For such purpose, we propose an all-polymeric Bloch surface wave (BSW) structure that supports a bright BSW mode and a dark surface Fano state that is embedded in the continuum, both of which coupled to the same radiation channels. The existence of the sharp dip with a maximum depth of Fano line could be interpreted with the physics of Friedrich–Wintgen bound states in the continuum (FW-BICs), because of the destructive interference between bright BSW and dark surface Fano modes. A strong angular- and frequency-dependent Q was found. Related influential factors to Q value may also include an asymmetric arrangement of top and grating layers, together with the weak coupling provided by photonic crystals. One numerically optimized design shows a quality factor Q of the Fano mode as 23,670, which is almost two orders higher than that in conventional metallic-metamaterial-based designs. The optimized sensitivity can numerically reach 4.34 THz/RIU in the frequency domain, which is one order higher than that reported in all-dielectric metasurfaces. We infer the high sensitivity is related to the phase-matching condition provided by near-subwavelength gratings. The associated FOM can reach 8857/RIU. Besides, the proposed design also numerically demonstrates high sensitivity in the angular domain ∼125.5°/RIU. Considering it poses no specific requirement for materials that own high contrast of permittivity in the THz regime, large interfacing area, the mechanical and chemical robustness offered by polymers and low cost in fabrication, such all-polymeric BSW structure that supports novel Fano resonance in THz window may give access to rich applications in hazardous gas detection and label-free bio-sensing.

scholarly journals Integrated diffraction gratings on the Bloch surface wave platform supporting bound states in the continuum

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Evgeni A. Bezus ◽  
Dmitry A. Bykov ◽  
Leonid L. Doskolovich
Keyword(s):  
Surface Wave ◽  
Bound States ◽  
Transverse Electric ◽  
Diffraction Gratings ◽  
Incidence Geometry ◽  
Spectral Filters ◽  
Beam Splitters ◽  
High Q ◽  
Bloch Surface Wave ◽  
The Continuum

Abstract We propose and theoretically and numerically investigate integrated diffraction gratings for the Bloch surface wave (BSW) platform, which have subwavelength or near-subwavelength period. We demonstrate that, in the oblique incidence geometry of a transverse-electric polarized BSW and with a properly chosen band gap configuration of the photonic crystal supporting the surface waves, the proposed structures operate in the scattering-free regime, when the energy of the incident BSW is divided between the reflected and transmitted BSWs with the same polarization corresponding to the propagating diffraction orders of the grating, and not scattered away from the propagation surface. In this regime, the studied integrated gratings support high-Q resonances and bound states in the continuum not only in the subwavelength case when only the specular (zeroth) diffraction orders propagate, but also in the case when non-evanescent zeroth and −1st diffraction orders satisfy the so-called Littrow mounting condition. The proposed integrated gratings on the BSW platform can be used as efficient narrowband spatial or spectral filters operating in reflection, or as BSW beam splitters or deflectors operating in transmission. The obtained results may find application in two-dimensional photonic circuits for steering the BSW propagation.

Bloch surface wave-enhanced fluorescence biosensor

2013 ◽  
Vol 43 ◽  
pp. 108-114 ◽  
Author(s):  
Koji Toma ◽  
Emiliano Descrovi ◽  
Mana Toma ◽  
Mirko Ballarini ◽  
Pietro Mandracci ◽  
...  
Keyword(s):  
Surface Wave ◽  
Enhanced Fluorescence ◽  
Bloch Surface Wave ◽  
Fluorescence Biosensor

scholarly journals High performance liquid analyte sensing based on Bloch surface wave resonances in the spectral domain

2022 ◽  
Vol 145 ◽  
pp. 107492
Author(s):  
P. Hlubina ◽  
M. Gryga ◽  
D. Ciprian ◽  
P. Pokorny ◽  
L. Gembalova ◽  
...  
Keyword(s):  
Surface Wave ◽  
High Performance ◽  
Spectral Domain ◽  
Bloch Surface Wave

scholarly journals Bloch Surface Wave Resonance Based Sensors as an Alternative to Surface Plasmon Resonance Sensors

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5119 ◽  
Author(s):  
Michal Gryga ◽  
Dalibor Ciprian ◽  
Petr Hlubina
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Wave ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Moist Air ◽  
Polarized Waves ◽  
Wave Resonance ◽  
Highly Sensitive ◽  
Bloch Surface Wave ◽  
Spr Effect

We report on a highly sensitive measurement of the relative humidity (RH) of moist air using both the surface plasmon resonance (SPR) and Bloch surface wave resonance (BSWR). Both resonances are resolved in the Kretschmann configuration when the wavelength interrogation method is utilized. The SPR is revealed for a multilayer plasmonic structure of SF10/Cr/Au, while the BSWR is resolved for a multilayer dielectric structure (MDS) comprising four bilayers of TiO2/SiO2 with a rough termination layer of TiO2. The SPR effect is manifested by a dip in the reflectance of a p-polarized wave, and a shift of the dip with the change in the RH, or equivalently with the change in the refractive index of moist air is revealed, giving a sensitivity in a range of 0.042–0.072 nm/%RH. The BSWR effect is manifested by a dip in the reflectance of the spectral interference of s- and p-polarized waves, which represents an effective approach in resolving the resonance with maximum depth. For the MDS under study, the BSWRs were resolved within two band gaps, and for moist air we obtained sensitivities of 0.021–0.038 nm/%RH and 0.046–0.065 nm/%RH, respectively. We also revealed that the SPR based RH measurement is with the figure of merit (FOM) up to 4.7 × 10−4 %RH−1, while BSWR based measurements have FOMs as high as 3.0 × 10−3 %RH−1 and 1.1 × 10−3 %RH−1, respectively. The obtained spectral interferometry based results demonstrate that the BSWR based sensor employing the available MDS has a similar sensitivity as the SPR based sensor, but outperforms it in the FOM. BSW based sensors employing dielectrics thus represent an effective alternative with a number of advantages, including better mechanical and chemical stability than metal films used in SPR sensing.

scholarly journals Unidirectional propagation of the Bloch surface wave excited by the spinning magnetic dipole in two-dimensional photonic crystal slab

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Li-Ming Zhao ◽  
Yun-Song Zhou
Keyword(s):  
Photonic Crystal ◽  
Surface Wave ◽  
Magnetic Dipole ◽  
Incident Light ◽  
Polarization State ◽  
Oscillation Period ◽  
Unit Cell ◽  
Average Spin ◽  
Component Wave ◽  
Bloch Surface Wave

AbstractThe photonic spin Hall effect (PSHE) can be realized in a photonic crystal (PC) slab, that is, the unidirectional Bloch surface wave can propagate along the surface of the PC slab under the excitation of elliptical polarized magnetic dipole. It is further proved that PSHE is caused by the interference of the component surface waves excited by the different components of the incident light, which is the so called component wave interference (CWI) theory. In addition, we also find that the spin of the surface wave oscillates periodically in space, and the oscillation period is a unit cell. In a unit cell, the average spin keeps the spin orbit locked. The results show that the spin separation can also be modulated by the position and the polarization state of the magnetic dipole.

Combining label-free and fluorescence operation of Bloch surface wave optical sensors

2014 ◽  
Vol 39 (10) ◽  
pp. 2947 ◽  
Author(s):  
Alberto Sinibaldi ◽  
Antonio Fieramosca ◽  
Riccardo Rizzo ◽  
Aleksei Anopchenko ◽  
Norbert Danz ◽  
...  
Keyword(s):  
Surface Wave ◽  
Optical Sensors ◽  
Label Free ◽  
Bloch Surface Wave

Phase-sensitive Bloch Surface Wave sensing

2014 ◽  
Author(s):  
Yuhang Wan ◽  
Liya Shu ◽  
Xuekun Zhu ◽  
Zheng Zheng
Keyword(s):  
Surface Wave ◽  
Phase Sensitive ◽  
Bloch Surface Wave

High-Sensitivity Bloch Surface Wave Sensor with Fano Resonance in Grating-coupled Multilayer Structures

2021 ◽  
Author(s):  
Daohan Ge ◽  
Yujie Zhou ◽  
Mengcheng Lv ◽  
Jiakang Shi ◽  
Abubakar A. Babangida ◽  
...  
Keyword(s):  
Surface Wave ◽  
Fano Resonance ◽  
High Sensitivity ◽  
Multilayer Structures ◽  
Bloch Surface Wave

scholarly journals Bloch surface wave-coupled emission from quantum dots by ensemble and single molecule spectroscopy

RSC Advances ◽  
2015 ◽  
Vol 5 (67) ◽  
pp. 54403-54411 ◽  
Author(s):  
Krishanu Ray ◽  
Ramachandram Badugu ◽  
Joseph R. Lakowicz
Keyword(s):  
Quantum Dots ◽  
Photonic Crystal ◽  
Surface Wave ◽  
Single Molecule ◽  
Single Molecule Spectroscopy ◽  
One Dimensional ◽  
Fluorescence Studies ◽  
Emission Lifetime ◽  
Crystal Substrate ◽  
Bloch Surface Wave

Single particle fluorescence studies demonstrate increased brightness and reduced emission lifetime of individual QD575 on one-dimensional photonic crystal substrate.

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