Acousto–optical interaction in fishbone-like one-dimensional phoxonic crystal nanobeam

Hsiao, Fu‐Li; Hsieh, Hao Yu; Hsieh, Cheng Yi; Chiu, Chien Chao

doi:10.1007/s00339-014-8456-6

Cited by 4 publications

(1 citation statement)

References 28 publications

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“…Such values of the geometric parameters are chosen to keep the wavelength of the sound waves within the micrometer level to further use them in the acousto-optic coupling. Structures with these parameters have been studied in our past studies [24,40,41]. Figure 1b shows the band structure of a standard unit cell (i.e., dw = 0) with one mode marked in red circles.…”

Section: Structuresmentioning

confidence: 99%

High-Q Slow Sound Mode in a Phononic Fishbone Nanobeam Using an Acoustic Potential Well Cavity

2023

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Phononic crystals and phononic metamaterials are popular structures for manipulating acoustic waves with artificially arranged units that have different elastic constants. These structures are also used in acousto-optic coupling and optomechanical structures. In such research, a 1-D nanobeam containing a cavity region sandwiched by two mirror regions is one of the most common designs. However, searching bandgaps for suitable operation modes and the need for the mirror region are limitations in the device design. Therefore, we introduce the slow sound mode as the operating acoustic mode and use an acoustic potential well to further trap the phonons in the cavity. Three types of structures are introduced to investigate the effect of the potential well. The products of the mode frequencies and the quality factors of the modes are used to demonstrate the performance of the structures. The displacement field and the strain field show the concentrated slow sound modes of the potential wells and produce high quality factors.

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Section: Structuresmentioning

confidence: 99%

High-Q Slow Sound Mode in a Phononic Fishbone Nanobeam Using an Acoustic Potential Well Cavity

2023

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Compact nanocavity with elliptical slot inside photonic wire bandgap materials including sidewalls gratings for biosensing

Daraei

2016

Appl. Phys. A

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Optomechanical coupling in phoxonic–plasmonic slab cavities with periodic metal strips

Lin

Huang

Hsu

2015

Journal of Applied Physics

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We theoretically investigate the optomechanical (OM) coupling of submicron cavities formed in one-dimensional phoxonic–plasmonic slabs. The phoxonic–plasmonic slabs are structured by depositing periodic Ag strips onto the top surfaces of dielectric GaAs slabs to produce dual band gaps for both electromagnetic and acoustic waves, thereby inducing the coupling of surface plasmons with photons for tailoring the OM coupling. We quantify the OM coupling by calculating the temporal modulation of the optical resonance wavelength with the acoustic phonon-induced photoelastic (PE) and moving-boundary (MB) effects. We also consider the appearance of a uniform Ag layer on the bottom surface of the slabs to modulate the photonic–plasmonic coupling. The results show that the PE and MB effects can be constructive or destructive in the overall OM coupling, and their magnitudes depend not only on the quality factors of the resonant modes but also on the mode area, mode overlap, and individual symmetries of the photonic–phononic mode pairs. Lowering the mode area could be effective for enhancing the OM coupling of subwavelength photons and phonons. This study introduces possible engineering applications to achieve enhanced interaction between photons and phonons in nanoscale OM devices.

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Acousto–optical interaction in fishbone-like one-dimensional phoxonic crystal nanobeam

Cited by 4 publications

References 28 publications

High-Q Slow Sound Mode in a Phononic Fishbone Nanobeam Using an Acoustic Potential Well Cavity

High-Q Slow Sound Mode in a Phononic Fishbone Nanobeam Using an Acoustic Potential Well Cavity

Compact nanocavity with elliptical slot inside photonic wire bandgap materials including sidewalls gratings for biosensing

Optomechanical coupling in phoxonic–plasmonic slab cavities with periodic metal strips

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