Optical Microcavities of Spiral Shape: From Quantum Chaos to Directed Laser Emission

2009 ◽  
pp. 15-24
Author(s):  
M. Hentschel ◽  
T. -Y. Kwon
Keyword(s):  
Quantum Chaos ◽  
Laser Emission ◽  
Optical Microcavities ◽  
Spiral Shape

scholarly journals Temperature-tunable lasing from dye-doped chiral microdroplets encapsulated in a thin polymeric film

2018 ◽  
Vol 9 ◽  
pp. 379-383 ◽  
Author(s):  
Gia Petriashvili ◽  
Mauro Daniel Luigi Bruno ◽  
Maria Penelope De Santo ◽  
Riccardo Barberi
Keyword(s):  
Thin Film ◽  
Liquid Crystal ◽  
Polyvinyl Alcohol ◽  
Laser Emission ◽  
Laser Wavelength ◽  
Polymeric Film ◽  
Water Evaporation ◽  
Temperature Dependent ◽  
Free Standing ◽  
Optical Microcavities

In the last decade, much interest has grown around the possibility to use liquid-crystal droplets as optical microcavities and lasers. In particular, 3D laser emission from dye-doped cholesteric liquid crystals confined inside microdroplets paves the way for many applications in the field of sensors or tunable photonics. Several techniques can be used to obtain small microresonators as, for example, dispersing a liquid crystal inside an immiscible isotropic fluid to create an emulsion. Recently, the possibility to obtain a thin free-standing film starting from an emulsion having a mixture of water and polyvinyl alcohol as isotropic matrix has been reported. After the water evaporation, a polymeric film in which the microdroplets are encapsulated has been obtained. Bragg-type laser emission has been recorded from the emulsion as well as from the thin film. Here, we report on the possibility to tune the laser emission as a function of temperature. Using a chiral dopant with temperature dependent solubility, the emitted laser wavelength can be tuned in a range of 40 nm by a temperature variation of 18 °C. The proposed device can have applications in the field of sensors and for the development of anti-counterfeiting labels.

scholarly journals Direct observation of chaotic resonances in optical microcavities

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Shuai Wang ◽  
Shuai Liu ◽  
Yilin Liu ◽  
Shumin Xiao ◽  
Zi Wang ◽  
...  
Keyword(s):  
Quantum Chaos ◽  
Spectral Response ◽  
Internal Field ◽  
Internal Mode ◽  
Local Index ◽  
Wave Dynamics ◽  
Optical Microcavities ◽  
Chaotic Modes ◽  
Optical Domain ◽  
Assisted Tunneling

AbstractOptical microcavities play a significant role in the study of classical and quantum chaos. To date, most experimental explorations of their internal wave dynamics have focused on the properties of their inputs and outputs, without directly interrogating the dynamics and the associated mode patterns inside. As a result, this key information is rarely retrieved with certainty, which significantly restricts the verification and understanding of the actual chaotic motion. Here we demonstrate a simple and robust approach to directly and rapidly map the internal mode patterns in chaotic microcavities. By introducing a local index perturbation through a pump laser, we report a spectral response of optical microcavities that is proportional to the internal field distribution. With this technique, chaotic modes with staggered mode spacings can be distinguished. Consequently, a complete chaos assisted tunneling (CAT) and its time-reversed process are experimentally verified in the optical domain with unprecedented certainty.

Quantum Chaos

1999 ◽  
Author(s):  
Hans-Jürgen Stöckmann
Keyword(s):  
Quantum Chaos

Quantum chaos: diffusion photoeffect in hydrogen

1987 ◽  
Vol 152 (5) ◽  
pp. 168
Author(s):  
D.L. Shepelyanskii
Keyword(s):  
Quantum Chaos

Degradation of Compressive Properties of Composite Laminates Due to Spiral Shape Damage

2003 ◽  
Vol 51 (595) ◽  
pp. 457-458
Author(s):  
Hiroshi Suemasu ◽  
Kenji Nakamura ◽  
Takashi Ishikawa
Keyword(s):  
Composite Laminates ◽  
Compressive Properties ◽  
Spiral Shape

RECLAMATION AND CULVERT CROSSINGS MADE OF CORRUGATED PIPES ON SPAWNING STREAMS

2020 ◽  
pp. 68-77
Author(s):  
O.N. CHERNYKH ◽  
◽  
A.V. RBURLACHENKO
Keyword(s):  
Single Point ◽  
Experimental Studies ◽  
Fish Passage ◽  
Future Research ◽  
Fish Stocks ◽  
Metal Structures ◽  
Natural Reproduction ◽  
Spiral Shape ◽  
Corrugated Metal ◽  
Spawning Streams

Recommendations are presented for solving issues that arise in the design and operation of tubular transport crossings of corrugated metal structures through spawning streams while ensuring the safety and natural reproduction of fish stocks. There are discussed the results of experimental studies of culverts made of metal corrugated pipes with a normal and spiral shape of corrugation the bottom of which is buried and filled with suitable granular material to the level of the natural channel of a small watercourse. It is established that when 10% of the area of the corrugated pipe is occupied by stone filling, its throughput is reduced by about 10-12%. Based on the review of the existing literature and the results of laboratory experiments, data is provided to estimate the values of the roughness coefficients of the composite cross-section of a single-point junction and directions for future research on culvert reclamation are outlined. Studying of the structure of the velocity distribution in culverts can lead to the improved conditions for fish passage without installing special structural elements in the transit path of the fish passage structure.

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