Results 21 to 30 of about 1,794 (182)

Investigation on the Crack Effect in the Cylinder and Matrix on the Backscattering Field Frequency Specifications using the Finite Element Method [PDF]

Journal of Applied and Computational Mechanics, 2022
A novel method to determine the health of the industrial parts is using the ultrasound scattering waves. Any changes in the structure of the scattering object or in the boundary conditions will cause a change in the scattering field.
Omid Noormohammadi Arani, Amin Yaghootian, Sina Sodagar   +2 more
doaj   +1 more source

Review of biosensing with whispering-gallery mode lasers [PDF]

Light: Science & Applications, 2021
AbstractLasers are the pillars of modern optics and sensing. Microlasers based on whispering-gallery modes (WGMs) are miniature in size and have excellent lasing characteristics suitable for biosensing. WGM lasers have been used for label-free detection of single virus particles, detection of molecular electrostatic changes at biointerfaces, and ...
N. A. Toropov, Gema Cabello, Mariana P. Serrano, Rithvik R. Gutha, Matías Rafti, Frank Vollmer   +5 more
openaire   +6 more sources

Aptasensors Based on Whispering Gallery Mode Resonators [PDF]

Biosensors, 2016
In this paper, we review the literature on optical evanescent field sensing in resonant cavities where aptamers are used as biochemical receptors. The combined advantages of highly sensitive whispering gallery mode resonator (WGMR)-based transducers, and of the unique properties of aptamers make this approach extremely interesting in the medical field,
Gualtiero Nunzi Conti, Simome Berneschi, Silvia Soria   +2 more
openaire   +4 more sources

Er3+ doped tellurite whispering gallery mode microlasers in 1.5 μm–1.61 μm wavelength region generated by 0.98 μm and 1.48 μm pump lasers

Optical Materials: X, 2023
In this paper, we demonstrate Er3+ doped tellurite single and multi-mode microlasers in 1.5 μm–1.6 μm wavelength range fabricated via the plasma torch method.
Snigdha Thekke Thalakkal, Davor Ristić, Gualtiero Nunzi Conti, Stefano Pelli, Gabriele Frigenti, Hrvoje Gebavi, Alessandro Chiasera, Mile Ivanda   +7 more
doaj   +1 more source

Carrier-induced refractive index change observed by a whispering gallery mode shift in GaN microrods

New Journal of Physics, 2015
Vertical oriented GaN microrods were grown by metal-organic vapor phase epitaxy with four different n-type carrier concentration sections above 10 ^19 cm ^−3 along the c -axis.
C Tessarek, R Goldhahn, G Sarau, M Heilmann, S Christiansen   +4 more
doaj   +1 more source

Effect of tapering diameters with microbottle resonator for formaldehyde (CH2O) liquid sensing

Sensing and Bio-Sensing Research, 2019
In this study, we demonstrate the effect of the microbottle resonator (MBR) based on whispering gallery modes (WGMs) with two different diameters of tapered microfibre and its experiment with the formaldehyde (CH2O) liquid sensor. The MBR with the bottle
Md Ashadi Md Johari, Muhammad Imran Mustafa Abdul Khudus, Mohd Hafiz Bin Jali, M.S. Maslinda, Ummu Umairah Mohamad Ali, Sulaiman Wadi Harun, A.H. Zaidan, R. Apsari, M. Yasin   +8 more
doaj   +1 more source

Reconfigurable Liquid Whispering Gallery Mode Microlasers [PDF]

Scientific Reports, 2016
AbstractEngineering photonic devices from liquid has been emerging as a fascinating research avenue. Reconfigurably tuning liquid optical micro-devices are highly desirable but remain extremely challenging because of the fluidic nature. In this article we demonstrate an all-liquid tunable whispering gallery mode microlaser floating on a liquid surface ...
Yang S., Ta V.D., Wang Y., Chen R., He T., Demir H.V., Sun H.   +6 more
openaire   +5 more sources

Spherical whispering‐gallery‐mode microresonators

Laser & Photonics Reviews, 2010
AbstractWhispering‐gallery modes (WGM) on a spherical surface were first described by Lord Rayleigh at the beginning of the last century, but only after the invention of laser did they start to have some scientific relevance and only during the last two decades there has been a substantial move towards real devices and practical applications.
A Chiasera, Y Dumeige, P Féron, M Ferrari, Y Jestin, G Nunzi Conti, S Pelli, S Soria, GC Righini   +8 more
openaire   +2 more sources

Acoustic whispering-gallery modes in optomechanical shells

New Journal of Physics, 2012
We numerically calculate the forms and frequencies of mechanical whispering-gallery modes in silica shells. Such modes were recently experimentally observed in water-filled optomechanical resonators, which constitute a bridge between optomechanics and ...
Gaurav Bahl, Xudong Fan, Tal Carmon
doaj   +1 more source

Luminescent Donor‐Acceptor Radical With Propeller Chirality: Bright and Photostable Red Circularly Polarized Luminescence and Whispering Gallery Mode Resonance

Angewandte Chemie, EarlyView.
A series of donor‐attached brominated chiral luminescent radicals (CzTTBrM, 2CzTTBrM, and 3CzTTBrM) was synthesized, showing red to near‐infrared (NIR) circularly polarized luminescence (CPL) with exceptionally high PLQY of up to 76% and markedly enhanced CPL brightness (BCPL). Doping into polystyrene microspheres further yields whispering gallery mode
Kazuhiro Nakamura, Kenshiro Matsuda, Kosuke Anraku, Keiko Yamaoka, Taisuke Matsumoto, Fumitaka Ishiwari, Takeaki Zaima, Wataru Ota, Emiko Fujiwara, Tohru Sato, Yoshitaka Inoue, Soh Kushida, Yohei Yamamoto, Takuya Hosokai, Ken Albrecht   +14 more
wiley   +2 more sources