Optical microcavities with tubular geometry: properties and applications

Wang, Jiao; Zhan, Tianrong; Huang, Gaoshan; Chu, Paul K.; Mei, Yongfeng

doi:10.1002/lpor.201300040

Cited by 102 publications

(99 citation statements)

References 190 publications

(494 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

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%

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

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%

mentioning

confidence: 99%

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

Wang

Yin

et al. 2017

Advanced Optical Materials

View full text Add to dashboard Cite

show abstract

“…A variety of rotationally symmetric WGMR with high Qvalue have been fabricated, including microsphere [13], microdisk [14], microtoroid [15], and microtubular [16]. With rapid development of preparation technology, a wide varieties of different shaped resonators are now available.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and spectral characterizations of high Q asymmetric resonant cavities

Tang

Liu

Shang

et al. 2015

Optics Communications

View full text Add to dashboard Cite

“…Common WGM resonators include spheres [1,2], disks and toroids [3,4], optical fibers [5][6][7], and capillaries [8,9]. WGM resonators have attracted considerable interest within the sensing community largely due to their potential use in refractometry-based fluid sensing and labelfree biosensing applications [10].…”

Section: Introductionmentioning

confidence: 99%

“…(1)(2)(3)(4)(5) It becomes apparent that there is a tradeoff in achieving lasing in optofluidic capillaries. A thicker polymer coating is required to sustain the high Q factors necessary to achieve lasing and to also minimize photobleaching by ensuring a low lasing threshold.…”

mentioning

confidence: 99%

Lasing of whispering gallery modes in optofluidic microcapillaries

et al. 2016

View full text Add to dashboard Cite

This paper demonstrates lasing of the whispering gallery modes in polymer coated optofluidic capillaries and their application to refractive index sensing. The laser gain medium used here is fluorescent Nile Red dye, which is embedded inside the high refractive index polymer coating. We investigate the refractometric sensing properties of these devices for different coating thicknesses, revealing that the high Q factors required to achieve low lasing thresholds can only be realized for relatively thick polymer coatings (in this case ≥ 800 nm). Lasing capillaries therefore tend to have a lower refractive index sensitivity, compared to non-lasing capillaries which can have a thinner polymer coating, due to the stronger WGM confinement within the polymer layer. However we find that the large improvement in signal-to-noise ratio realized for lasing capillaries more than compensates for the decreased sensitivity and results in an order-of-magnitude improvement in the detection limit for refractive index sensing.

show abstract

Optical microcavities with tubular geometry: properties and applications

Cited by 102 publications

References 190 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

Fabrication and spectral characterizations of high Q asymmetric resonant cavities

Lasing of whispering gallery modes in optofluidic microcapillaries

Contact Info

Product

Resources

About