scholarly journals A Nanoscale Photonic Crystal Cavity Optomechanical System for Ultrasensitive Motion Sensing

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 462
Author(s):  
Ji Xia ◽  
Fuyin Wang ◽  
Chunyan Cao ◽  
Zhengliang Hu ◽  
Heng Yang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Cavity ◽  
Optical Quality ◽  
Optical Force ◽  
Mechanical Oscillator ◽  
Maximum Displacement ◽  
Optomechanical System ◽  
High Optical Quality ◽  
Hybrid Platform ◽  
Optomechanical Coupling

Optomechanical nanocavities open a new hybrid platform such that the interaction between an optical cavity and mechanical oscillator can be achieved on a nanophotonic scale. Owing to attractive advantages such as ultrasmall mass, high optical quality, small mode volume and flexible mechanics, a pair of coupled photonic crystal nanobeam (PCN) cavities are utilized in this paper to establish an optomechanical nanosystem, thus enabling strong optomechanical coupling effects. In coupled PCN cavities, one nanobeam with a mass meff~3 pg works as an in-plane movable mechanical oscillator at a fundamental frequency of . The other nanobeam couples light to excite optical fundamental supermodes at and 1554.464 nm with a larger than 4 × 104. Because of the optomechanical backaction arising from an optical force, abundant optomechanical phenomena in the unresolved sideband are observed in the movable nanobeam. Moreover, benefiting from the in-plane movement of the flexible nanobeam, we achieved a maximum displacement of the movable nanobeam as 1468 . These characteristics indicate that this optomechanical nanocavity is capable of ultrasensitive motion measurements.

scholarly journals Injection locking in an optomechanical coherent phonon source

Nanophotonics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 1319-1327
Author(s):  
Guillermo Arregui ◽  
Martín F. Colombano ◽  
Jeremie Maire ◽  
Alessandro Pitanti ◽  
Néstor E. Capuj ◽  
...  
Keyword(s):  
Optical Cavity ◽  
Single Layer ◽  
High Amplitude ◽  
Temperature Limit ◽  
Coherent Phonon ◽  
Mechanical Oscillator ◽  
Detection Scheme ◽  
Optomechanical System ◽  
Arnold Tongue ◽  
External Reference

Abstract Spontaneous locking of the phase of a coherent phonon source to an external reference is demonstrated in a deeply sideband-unresolved optomechanical system. The high-amplitude mechanical oscillations are driven by the anharmonic modulation of the radiation pressure force that result from an absorption-mediated free-carrier/temperature limit cycle, i.e., self-pulsing. Synchronization is observed when the pump laser driving the mechanical oscillator to a self-sustained state is modulated by a radiofrequency tone. We employ a pump-probe phonon detection scheme based on an independent optical cavity to observe only the mechanical oscillator dynamics. The lock range of the oscillation frequency, i.e., the Arnold tongue, is experimentally determined over a range of external reference strengths, evidencing the possibility to tune the oscillator frequency for a range up to 350 kHz. The stability of the coherent phonon source is evaluated via its phase noise, with a maximum achieved suppression of 44 dBc/Hz at 1 kHz offset for a 100 MHz mechanical resonator. Introducing a weak modulation in the excitation laser reveals as a further knob to trigger, control and stabilize the dynamical solutions of self-pulsing based optomechanical oscillators, thus enhancing their potential as acoustic wave sources in a single-layer silicon platform.

Three-Dimensional Photonic Crystals

2004 ◽  
Vol 99-100 ◽  
pp. 55-64 ◽  
Author(s):  
D.C. Meisel ◽  
M. Deubel ◽  
M. Hermatschweiler ◽  
K. Busch ◽  
W. Koch ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Optical Spectroscopy ◽  
Electron Micrographs ◽  
Near Infrared ◽  
Three Dimensional ◽  
Optical Quality ◽  
Direct Laser Writing ◽  
High Optical Quality ◽  
Direct Laser

We review our work on two complementary and compatible techniques, namely direct laser writing and holographic lithography which are suitable for fabricating three-dimensional Photonic Crystal templates for the visible and near-infrared. The structures are characterized by electron micrographs and by optical spectroscopy, revealing their high optical quality.

Reactive ion etching of high optical quality GaN∕sapphire photonic crystal slab using CH4–H2 chemistry

2007 ◽  
Vol 101 (4) ◽  
pp. 043103 ◽  
Author(s):  
S. Bouchoule ◽  
S. Boubanga-Tombet ◽  
L. Le Gratiet ◽  
M. Le Vassor d’Yerville ◽  
J. Torres ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Reactive Ion Etching ◽  
Optical Quality ◽  
Ion Etching ◽  
High Optical Quality ◽  
Photonic Crystal Slab

High optical quality GaN nanopillar arrays

2005 ◽  
Vol 86 (7) ◽  
pp. 071917 ◽  
Author(s):  
Y. D. Wang ◽  
S. J. Chua ◽  
S. Tripathy ◽  
M. S. Sander ◽  
P. Chen ◽  
...  
Keyword(s):  
Optical Quality ◽  
High Optical Quality ◽  
Nanopillar Arrays

Fabrication of ALF3-Based Glass Fibers

1989 ◽  
Vol 172 ◽  
Author(s):  
Mahmoud R. Shahriari ◽  
Tariq Iqbal ◽  
Paul R. Foy ◽  
Steve J. Saggese ◽  
G. H. Sigel
Keyword(s):  
Thermal Properties ◽  
Laser Power ◽  
Short Range ◽  
Glass Fibers ◽  
Optical Quality ◽  
Chemical Durability ◽  
Power Delivery ◽  
Mechanical And Thermal Properties ◽  
High Optical Quality ◽  
Remote Spectroscopy

AbstractSeveral glass systems based on AIF3 have been synthesized and fabricated into preforms by controlled melting and rotational casting. High optical quality preforms have been drawn into fibers using a specially modified drawing facility. The drawing tower is enclosed with a vertical glove box in which the levels of both moisture and oxygen are kept below 1 ppm during the drawing. The AIF3 -based fibers have shown dramatically superior chemical durability relative to the ZrF4 -based glass fibers. Selected optical, mechanical and thermal properties of these fibers will be presented. AIF3 -based glass fibers offer interesting opportunities for short range applications in the 2–4 micron region of the infrared such as sensing, remote spectroscopy and laser power delivery.

Catalyst-free growth of high-optical quality GaN nanowires by metal-organic vapor phase epitaxy

2011 ◽  
Vol 99 (25) ◽  
pp. 251910 ◽  
Author(s):  
X. J. Chen ◽  
B. Gayral ◽  
D. Sam-Giao ◽  
C. Bougerol ◽  
C. Durand ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Optical Quality ◽  
Vapor Phase Epitaxy ◽  
High Optical Quality ◽  
Organic Vapor ◽  
Gan Nanowires ◽  
Catalyst Free ◽  
Metal Organic ◽  
Free Growth

MOVPE growth of high optical quality InGaPN layers on GaAs (001) substrates

2010 ◽  
Vol 7 (7-8) ◽  
pp. 2079-2081 ◽  
Author(s):  
Dares Kaewket ◽  
Sakuntam Sanorpim ◽  
Sukkaneste Tungasmita ◽  
Ryuji Katayama ◽  
Kentaro Onabe
Keyword(s):  
Optical Quality ◽  
High Optical Quality ◽  
Movpe Growth

scholarly journals Enhanced fluorescence emission using a photonic crystal coupled to an optical cavity

CLEO: 2013 ◽  
2013 ◽  
Author(s):  
Anusha Pokhriyal ◽  
Meng Lu ◽  
Vikram Chaudhery ◽  
Sherine George ◽  
Brian T. Cunningham
Keyword(s):  
Photonic Crystal ◽  
Optical Cavity ◽  
Fluorescence Emission ◽  
Enhanced Fluorescence
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