Dynamic Molecular Processes Detected by Microtubular Opto‐chemical Sensors Self‐Assembled from Prestrained Nanomembranes

Ma, Libo; Li, Shilong; Quiñones, Vladimir A. Bolaños; Yang, Lichun; Xi, Wang; Jorgensen, Matthew R.; Baunack, S.; Mei, Yongfeng; Kiravittaya, Suwit; Schmidt, Oliver G.

doi:10.1002/adma.201204065

Cited by 45 publications

(46 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[24][25][26][27] These key merits enable extensive applications ranging from optofluidic sensing, [28][29][30][31] single cell analysis, [32] dynamic molecular process detection, [33] photon plasmon coupling, [34] to optical spin-orbit coupling. [35] To combine with other media/objects, luminescent quantum dots, [36,37] quantum wells, [38] and organic molecules [39] have been enwrapped into the microtube wall by the rolling up process, which couple photoluminescence (PL) light to the microtube cavities to support whisperinggallery mode (WGM) resonances.…”

Section: Strong Coupling In a Photonic Molecule Formed By Trapping A mentioning

confidence: 99%

“…[11,41] In our micro spheretube system, the n eff of the microtube can be changed by releasing water molecule layers adsorbed on the tube sur face. [33] To gradually release the water nanolayer, the laser pump power is increased step by step from 1% to 50%, and the resonant spectra were recorded accordingly, as shown in Figure 5a. The release of water nanolayer from the ultrathin tube wall leads to a slightly reduced n eff of the tube wall.…”

Section: Anticrossing Behavior Of Coupled Modesmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Strong Coupling in a Photonic Molecule Formed by Trapping a Microsphere in a Microtube Cavity

Wang

Yin

et al. 2017

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

role for the efficient intercavity coupling. However, the evanescent field is relatively weak in the reported photonic mole cules because most of the optical field is strongly confined within the coupled cavities (e.g., microdisks, [4,8,11,18] micro toroids, [19] microspheres, [3] microrods, [5,20] and microfibers [7] ). As such, one needs a deliberate control on both the cavity geometries and the intercavity coupling gap to ensure a good spectral match and efficient evanescent coupling between the coupled cavities. [18] Moreover, dynamic tuning of the intercavity coupling strength has been investigated in recent years, which were carried out by advanced and sophisticated techniques such as strain tuning, [21,22] acoustooptic control, [23] and precise micromanipulation techniques. [3] To extend and promote the research in the field of photonic molecules, it is of high interest to design novel photonic molecules extending from adjacent solid microcavities to thinwalled hollow cavities which possess intense evanescent field facilitating intercavity coupling and provide novel strategy for tuning of the coupling strength.Microtube cavities, which are formed by selfrolling of pre strained nanomembranes, feature unique properties such as hollowcore structures and ultrathin cavity walls (≈100-300 nm) for the study of lightmatter interactions and the integration of "labinatube" systems. [24][25][26][27] These key merits enable extensive applications ranging from optofluidic sensing, [28][29][30][31] single cell analysis, [32] dynamic molecular process detection, [33] photon plasmon coupling, [34] to optical spin-orbit coupling.[35] To combine with other media/objects, luminescent quantum dots, [36,37] quantum wells, [38] and organic molecules [39] have been enwrapped into the microtube wall by the rolling up process, which couple photoluminescence (PL) light to the microtube cavities to support whisperinggallery mode (WGM) resonances. [37,40] In this context, a design and demonstration of photonic molecule based on microtube cavity is of fundamental interest for the study of strong optical coupling and the promo tion of its potential applications.Herein, we report a novel design of photonic molecule by trapping a microsphere cavity into the hollow core of a rolled up microtube cavity. We focus on studying the WGM coupling between the trapped microsphere and microtube cavity with a significant difference of cavity sizes, which is in contrast to pre vious reports where the two externally adjacent microcavities possess highly similar sizes [11,12,41] or slightly mismatched sizes (less than two times). [4][5][6][7]18,[42][43][44] Periodic modulations on A photonic molecule formed by trapping a microsphere cavity into a hollow microtube cavity is demonstrated, which provides a novel design over conventional photonic molecules comprised of solid-core whispering gallery mode microcavities with externally tangent configuration. Periodic spectral modulations of mode intensity, resonant mode shift, and quality factor are observed...

show abstract

Section: Strong Coupling In a Photonic Molecule Formed By Trapping A mentioning

confidence: 99%

Section: Anticrossing Behavior Of Coupled Modesmentioning

confidence: 99%

See 1 more Smart Citation

Strong Coupling in a Photonic Molecule Formed by Trapping a Microsphere in a Microtube Cavity

Wang

Yin

et al. 2017

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…3a and c. The calculated results agree well with the measured optical modes for both microcavities. The tuning of the optical modes in rolled-up microcavities by post-deposition of thin films has been discussed in previous works [32,33], and can be incorporated in the equations by modifying the quasi-potential k circ (z) employing perturbation theory [34,35]. The variation of k circ (z) (=ω/c) caused by the thin film deposition is determined by and E 5 exhibit a larger blueshift in comparison to the even order axial modes E 2 , E 4 and E 6 .…”

mentioning

confidence: 99%

Localized Surface Plasmons Selectively Coupled to Resonant Light in Tubular Microcavities

Yin

Böttner

et al. 2016

Phys. Rev. Lett.

Self Cite

View full text Add to dashboard Cite

Vertical gold-nanogaps are created on microtubular cavities to explore the coupling between resonant light supported by the microcavities and surface plasmons localized at the nanogaps. Selective coupling of optical axial modes and localized surface plasmons critically depends on the exact location of the gold-nanogap on the microcavities which is conveniently achieved by rolling-up specially designed thin dielectric films into three dimensional microtube ring resonators. The coupling phenomenon is explained by a modified quasi-potential model based on perturbation theory. Our work reveals the coupling of surface plasmon resonances localized at the nanoscale to optical resonances confined in microtubular cavities at the microscale, implying a promising strategy for the investigation of light-matter interactions.

show abstract

“…Particles with a size less than 300 nm in air can penetrate the lung and sequentially enter the blood, causing severe organ damage. Optical microcavities featuring high-Q factors and small mode volumes, such as Fabry-Perot cavities [3], photonic crystals [4,5], microspheres [6][7][8][9], microrings [10][11][12][13][14], microtoroids [15][16][17], microbubbles [18][19][20], and microtubes [21,22] have been widely investigated in sensing applications. In general, the microcavity sensing depends mainly on reactive (i.e., dispersive) interactions, resulting in a resonance wavelength shift [23][24][25][26] or mode splitting [26,27], which essentially responds to the real part of the polarizability of the targets.…”

Section: Introductionmentioning

confidence: 99%

Detection of Single Nanoparticles Using the Dissipative Interaction in a High-QMicrocavity

Shen

Zhi

et al. 2016

Phys. Rev. Applied

View full text Add to dashboard Cite

Ultrasensitive optical detection of nanometer-scaled particles is highly desirable for applications in early-stage diagnosis of human diseases, environmental monitoring, and homeland security, but remains extremely difficult due to ultralow polarizabilities of small-sized, low-index particles. Optical whispering-gallery-mode microcavities, which can enhance significantly the light-matter interaction, have emerged as promising platforms for label-free detection of nanoscale objects. Different from the conventional whispering-gallery-mode sensing relying on the reactive (i.e., dispersive) interaction, here we propose and demonstrate to detect single lossy nanoparticles using the dissipative interaction in a high-Q toroidal microcavity. In the experiment, detection of single gold nanorods in an aqueous environment is realized by monitoring simultaneously the linewidth change and shift of the cavity mode. The experimental result falls within the theoretical prediction. Remarkably, the reactive and dissipative sensing methods are evaluated by setting the probe wavelength on and off the surface plasmon resonance to tune the absorption of nanorods, which demonstrates clearly the great potential of the dissipative sensing method to detect lossy nanoparticles. Future applications could also combine the dissipative and reactive sensing methods, which may provide better characterizations of nanoparticles.

show abstract

Dynamic Molecular Processes Detected by Microtubular Opto‐chemical Sensors Self‐Assembled from Prestrained Nanomembranes

Cited by 45 publications

References 42 publications

Strong Coupling in a Photonic Molecule Formed by Trapping a Microsphere in a Microtube Cavity

Strong Coupling in a Photonic Molecule Formed by Trapping a Microsphere in a Microtube Cavity

Localized Surface Plasmons Selectively Coupled to Resonant Light in Tubular Microcavities

Detection of Single Nanoparticles Using the Dissipative Interaction in a High-QMicrocavity

Contact Info

Product

Resources

About