Results 31 to 40 of about 19,826 (214)

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

Modal domains and selectivity in large square lasers

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
Modes in square resonators have C4v symmetry. A special set of modes in these resonators have odd parities and behave like whispering gallery modes. These quasi-whispering gallery modes have high quality factors and exhibit interesting features.
Liming Liu, Ziyuan Li, Haroldo T. Hattori   +2 more
doaj   +1 more source

Shaping Optical Microresonators on the Surface of Optical Fibers With Negative Effective Radius Variations

IEEE Photonics Journal, 2021
We examine moderate CO2 laser heating as a method of forming negative effective radius variations in conventional optical fiber. Fiber samples were subjected to focused CO2 laser radiation in the form of 100 ms pulses with power 0.36 to 1.3 W and ...
Dmitry V. Krisanov, Alexander S. Nesterok, Ilya D. Vatnik   +2 more
doaj   +1 more source

Whispering Gallery States of Antihydrogen

, 2012
We study theoretically interference of the long-living quasistationary quantum states of antihydrogen atoms, localized near a concave material surface.
A. Yu. Voronin, Baron J. W. Strutt Rayleigh, G. Mie, L. Rayleigh, S. Reynaud, V. V. Nesvizhevsky   +5 more
core   +3 more sources

Modal Spectroscopy of Optoexcited Vibrations of a Micron-Scale On-Chip Resonator at Greater than 1 GHz Frequency [PDF]

, 2007
We analyze experimentally and theoretically >1 GHz optoexcited mechanical vibration in an on-chip micron-scaled sphere. Different eigen-mechanical modes are excited upon demand by the centrifugal radiation pressure of the optical whispering-gallery-mode,
Carmon, Tal, Vahala, Kerry J.
core   +1 more source

Open whispering gallery mode resonators

Optics Letters
There are some issues with traditional whispering gallery mode (WGM) resonators such as poor light extraction and a dense mode spectrum. In this paper, we introduce a solution to these limitations by proposing open WGM (OWGM) resonators that effectively reduce the mode density and enable directional radiation through a connected waveguide at the ...
D. R. Kazanov, A. M. Monakhov
openaire   +3 more sources

Coupling coefficients of the Spherical dielectric microresonators with whispering gallery modes

Vìsnik Nacìonalʹnogo Tehnìčnogo Unìversitetu Ukraïni Kììvsʹkij Polìtehnìčnij Ìnstitut: Serìâ Radìotehnìka, Radìoaparatobuduvannâ, 2015
The calculation results of the Spherical dielectric microresonators coupling coefficients with whispering gallery modes are presented. Microresonator coupling coefficients as a functions of main parameters is considered. S-matrix frequency dependences of 
A. A. Trubin
doaj   +1 more source

TeraHz tuning of whispering gallery modes in a PDMS, stand-alone, stretchable microsphere

, 2012
We report on tuning the optical whispering gallery modes in a poly dimethyl siloxane-based (PDMS) microsphere resonator by more than a THz. The PDMS microsphere system consists of a solid spherical resonator directly formed with double stems on either ...
Andrea Finizio, Armani, Chau, Chiba, Dinyari, Ferraro, Grilli, Henze, Ioppolo, Ioppolo, Ioppolo, John Daniel Riordan, Jonathan M Ward, Kim, Louyer, Ma, Mayer Alegre, Pietro Ferraro, Ramgopal Madugani, Rezac, Sara Coppola, Schäffer, Simonetta Grilli, Sumetsky, Síle Nic Chormaic, Veronica Vespini, Vollmer, von Klitzing, Ward, Watkins, White, Wiederhecker, Yong Yang   +32 more
core   +1 more source