Luminescent nanoparticles embedded in TiO2microtube cavities for the activation of whispering-gallery-modes extending from the visible to the near infrared

Nanoscale ◽  
2016 ◽  
Vol 8 (18) ◽  
pp. 9498-9503 ◽  
Author(s):  
Abbas Madani ◽  
Libo Ma ◽  
Shading Miao ◽  
Matthew R. Jorgensen ◽  
Oliver G. Schmidt
Keyword(s):  
Near Infrared ◽  
Whispering Gallery Modes ◽  
Whispering Gallery ◽  
Luminescent Nanoparticles

scholarly journals Liquid Droplet Microresonators

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 473 ◽  
Author(s):  
Antonio Giorgini ◽  
Saverio Avino ◽  
Pietro Malara ◽  
Paolo De Natale ◽  
Gianluca Gagliardi
Keyword(s):  
Acoustic Waves ◽  
Near Infrared ◽  
Liquid Droplet ◽  
Scattered Light ◽  
Surface Acoustic Waves ◽  
Optical Quality ◽  
Whispering Gallery Modes ◽  
New Paradigm ◽  
Frequency Locking ◽  
Whispering Gallery

We provide here an overview of passive optical micro-cavities made of droplets in the liquid phase. We focus on resonators that are naturally created and suspended under gravity thanks to interfacial forces, illustrating simple ways to excite whispering-gallery modes in various slow-evaporation liquids using free-space optics. Similar to solid resonators, frequency locking of near-infrared and visible lasers to resonant modes is performed exploiting either phase-sensitive detection of the leakage cavity field or multiple interference between whispering-gallery modes in the scattered light. As opposed to conventional micro-cavity sensors, each droplet acts simultaneously as the sensor and the sample, whereby the internal light can detect dissolved compounds and particles. Optical quality factors up to 107–108 are observed in liquid-polymer droplets through photon lifetime measurements. First attempts in using single water droplets are also reported. These achievements point out their huge potential for direct spectroscopy and bio-chemical sensing in liquid environments. Finally, the first experiments of cavity optomechanics with surface acoustic waves in nanolitre droplets are presented. The possibility to perform studies of viscous-elastic properties points to a new paradigm: a droplet device as an opto-fluid-mechanics laboratory on table-top scale under controlled environmental conditions.

scholarly journals Nonlinear imaging of whispering gallery modes in GaN microwires

2021 ◽  
Vol 2015 (1) ◽  
pp. 012015
Author(s):  
Yury Berdnikov ◽  
Igor Shtrom ◽  
Maria Rozhavskaya ◽  
Wsevolod Lundin ◽  
Nicholas Hendricks ◽  
...  
Keyword(s):  
Optical Microscopy ◽  
Nonlinear Optical ◽  
Near Infrared ◽  
Whispering Gallery Modes ◽  
Far Field ◽  
Green Luminescence ◽  
Nonlinear Optical Microscopy ◽  
Whispering Gallery ◽  
Infrared Excitation ◽  
Nonlinear Imaging

Abstract In this work non-scanning far-field nonlinear optical microscopy is employed to study the whispering gallery modes in tapered GaN microwire resonators. We demonstrate the confinement of whispering gallery modes under near-infrared excitation with the photon energy close to half of GaN bandgap. Our results indicate the enhancement of yellow-green luminescence by whispering gallery modes in GaN microwires.

Whispering gallery modes enhance the near-infrared photoresponse of hourglass-shaped silicon nanowire photodiodes

2019 ◽  
Vol 2 (12) ◽  
pp. 572-579 ◽  
Author(s):  
Kihyun Kim ◽  
Sol Yoon ◽  
Myunghae Seo ◽  
Seungho Lee ◽  
Hyeonsu Cho ◽  
...  
Keyword(s):  
Near Infrared ◽  
Silicon Nanowire ◽  
Whispering Gallery Modes ◽  
Whispering Gallery

scholarly journals FRET-mediated near infrared whispering gallery modes: studies on the relevance of intracavity energy transfer with Q-factors

2018 ◽  
Vol 2 (2) ◽  
pp. 270-274 ◽  
Author(s):  
Osamu Oki ◽  
Soh Kushida ◽  
Annabel Mikosch ◽  
Kota Hatanaka ◽  
Youhei Takeda ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Conjugated Polymers ◽  
Near Infrared ◽  
Whispering Gallery Modes ◽  
Whispering Gallery ◽  
Q Factors ◽  
Wgm Resonators

NIR WGM resonators are fabricated from energy-donating and accepting conjugated polymers.

High-Q whispering gallery modes in pillar microcavities

2007 ◽  
Vol 32 (2-3) ◽  
pp. 123-126
Author(s):  
Y.-R. Nowicki-Bringuier ◽  
J. Claudon ◽  
C. Böckler ◽  
S. Reitzenstein ◽  
M. Kamp ◽  
...  
Keyword(s):  
Whispering Gallery Modes ◽  
High Q ◽  
Whispering Gallery

An electrically driven whispering gallery polariton microlaser

Nanoscale ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 5448-5459
Author(s):  
Mingming Jiang ◽  
Peng Wan ◽  
Kai Tang ◽  
Maosheng Liu ◽  
Caixia Kan
Keyword(s):  
Infrared Spectrum ◽  
Near Infrared ◽  
Whispering Gallery ◽  
Near Infrared Spectrum

An electrically driven whispering gallery polariton microlaser composed of a ZnO:Ga microwire and a p-GaAs template was fabricated. Its working characteristics of polariton lasing in the near-infrared spectrum were demonstrated.

Size-dependent whispering gallery modes in Au-coated ZnO microrods

2021 ◽  
Author(s):  
F. Bellarmine ◽  
Senthil Kumar Eswaran ◽  
Ramanjaneyulu Mannam ◽  
M. S. Ramachandra Rao
Keyword(s):  
Whispering Gallery Modes ◽  
Whispering Gallery ◽  
Size Dependent

On the Abramov approach for the approximation of whispering gallery modes in prolate spheroids

2020 ◽  
pp. 125599
Author(s):  
Pierluigi Amodio ◽  
Anton Arnold ◽  
Tatiana Levitina ◽  
Giuseppina Settanni ◽  
Ewa B. Weinmüller
Keyword(s):  
Whispering Gallery Modes ◽  
Whispering Gallery ◽  
Prolate Spheroids

All-optical tunable whispering gallery modes in a polymer bottle micro-resonator

2020 ◽  
pp. 1-1
Author(s):  
Hongxia Wang ◽  
Miaomiao Liao ◽  
Huifu Xiao ◽  
Zhenfu Zhang ◽  
Junbo Yang ◽  
...  
Keyword(s):  
Whispering Gallery Modes ◽  
Whispering Gallery ◽  
All Optical ◽  
Micro Resonator
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