scholarly journals Vortex Laser Based on a Plasmonic Ring Cavity

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 901
Author(s):  
Xingyuan Wang ◽  
Xiaoyong Hu ◽  
Tianrui Zhai
Keyword(s):  
Standing Wave ◽  
Ring Cavity ◽  
Single Mode ◽  
Optical Devices ◽  
Whispering Gallery Modes ◽  
Basic Building Block ◽  
Whispering Gallery ◽  
On Demand ◽  
On Chip ◽  
Structure Light

The orbital angular momentum (OAM) of the structure light is viewed as a candidate for enhancing the capacity of information processing. Microring has advantages in realizing the compact lasers required for on-chip applications. However, as the clockwise and counterclockwise whispering gallery modes (WGM) appear simultaneously, the emitted light from the normal microring does not possess net OAM. Here, we propose an OAM laser based on the standing-wave WGMs containing clockwise and counterclockwise WGM components. Due to the inhomogeneous intensity distribution of the standing-wave WGM, the single-mode lasing for the OAM light can be realized. Besides, the OAM of the emitted light can be designed on demand. The principle and properties of the proposed laser are demonstrated by numerical simulations. This work paves the way for exploring a single-mode OAM laser based on the plasmonic standing-wave WGMs at the microscale, which can be served as a basic building block for on-chip optical devices.

On-chip single-mode high-Q terahertz whispering gallery mode resonator

2019 ◽  
Vol 44 (11) ◽  
pp. 2835 ◽  
Author(s):  
Ziwei Wang ◽  
Shixing Yuan ◽  
Gaoneng Dong ◽  
Ruolan Wang ◽  
Liao Chen ◽  
...  
Keyword(s):  
Single Mode ◽  
Whispering Gallery Mode ◽  
High Q ◽  
Whispering Gallery ◽  
On Chip ◽  
Whispering Gallery Mode Resonator ◽  
Mode Resonator

scholarly journals Nonstandard FDTD Simulation-Based Design of CROW Wavelength Splitters

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Naoki Okada ◽  
James B. Cole ◽  
Shigeki Yamada ◽  
Kensuke Ogawa ◽  
Yoshifumi Katayama
Keyword(s):  
Optical Waveguides ◽  
Optical Devices ◽  
Whispering Gallery Modes ◽  
Fdtd Simulation ◽  
High Q ◽  
Whispering Gallery ◽  
Simulation Based Design ◽  
Simulation Based ◽  
Fdtd Simulations ◽  
Difference Time

The finite-difference time-domain (FDTD) algorithm has been used in simulation-based designs of many optical devices, but it fails to reproduce high-Q whispering gallery modes (WGMs). On the other hand, the nonstandard (NS) FDTD algorithm can accurately compute WGMs and can be used to make simulation-based designs of WGM devices. Wavelength splitters using the coupled resonator optical waveguides (CROWs) based on WGM couplings have recently attracted attention because they are potentially ultracompact. In this paper, we design a CROW wavelength splitter using NS FDTD simulations and demonstrate high interchannel extinction ratios of over 20 dB.

scholarly journals Out-of-plane emission of trions in monolayer WSe2 revealed by whispering gallery modes of dielectric microresonators

2020 ◽  
Author(s):  
Daniel Andres-Penares ◽  
Mojtaba Karimi Hábil ◽  
Alejandro Molina-Sánchez ◽  
Carlos Zapata-Rodríguez ◽  
Juan Martinez-Pastor ◽  
...  
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Close Contact ◽  
Spectroscopic Method ◽  
Whispering Gallery Modes ◽  
Quantum Communications ◽  
Whispering Gallery ◽  
Plane Component ◽  
Out Of Plane ◽  
On Chip

Abstract The manipulation of light emitted by two-dimensional semiconductors grounds forthcoming technologies in the field of on-chip communications. However, these technologies require from the so elusive out-of-plane photon sources to achieve an efficient coupling of radiated light into planar devices. Here we propose a versatile spectroscopic method that enables the identification of the out-of-plane component of dipoles due to the selective coupling of light emitted by in-plane and out-of-plane dipoles to the whispering gallery modes of spherical dielectric microresonators, in close contact to them. We have applied this method to demonstrate the existence of dipoles with an out-of-plane orientation in monolayer WSe2 at room temperature, by means of micro-photoluminescent measurements, numerical simulations based on finite element methods, and ab-initio calculations. Experimental results and ab-initio calculations identify trions as the source responsible for this out-of-plane emission, opening new routes for realizing on-chip integrated systems with applications in information processing and quantum communications.

scholarly journals Out-of-plane trion emission in monolayer WSe2 revealed by whispering gallery modes of dielectric microresonators

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Daniel Andres-Penares ◽  
Mojtaba Karimi Habil ◽  
Alejandro Molina-Sánchez ◽  
Carlos J. Zapata-Rodríguez ◽  
Juan P. Martínez-Pastor ◽  
...  
Keyword(s):  
Room Temperature ◽  
Close Contact ◽  
Spectroscopic Method ◽  
Whispering Gallery Modes ◽  
Quantum Communications ◽  
Whispering Gallery ◽  
Plane Component ◽  
Out Of Plane ◽  
Efficient Coupling ◽  
On Chip

AbstractThe manipulation of light emitted by two-dimensional semiconductors grounds forthcoming technologies in the field of on-chip communications. However, these technologies require from the so elusive out-of-plane photon sources to achieve an efficient coupling of radiated light into planar devices. Here we propose a versatile spectroscopic method that enables the identification of the out-of-plane component of dipoles. The method is based on the selective coupling of light emitted by in-plane and out-of-plane dipoles to the whispering gallery modes of spherical dielectric microresonators, in close contact to them. We have applied this method to demonstrate the existence of dipoles with an out-of-plane orientation in monolayer WSe2 at room temperature. Micro-photoluminescent measurements, numerical simulations based on finite element methods, and ab-initio calculations have identified trions as the source responsible for this out-of-plane emission, opening new routes for realizing on-chip integrated systems with applications in information processing and quantum communications.

Fast, Slow, Stopping and Storing Light Simultaneously using a PANDA Ring On-Chip

2013 ◽  
Vol 02 (01) ◽  
pp. 37-39 ◽  
Author(s):  
N. Sarapat ◽  
W. Khunnam ◽  
S. Chiangga ◽  
N. Thammawongsa ◽  
M. A. Jalil ◽  
...  
Keyword(s):  
Slow Light ◽  
Research Work ◽  
Microring Resonator ◽  
Whispering Gallery Modes ◽  
Whispering Gallery ◽  
On Chip ◽  
Technological University ◽  
University Scientists ◽  
Light Beams ◽  
Molecule Trapping

Past and slow light behaviors are the interesting aspects of light which can be useful for many fundamental and applied researches. Pornsuwancharoen and Yupapin et al. [1] have proposed the use of a simple device called “microring resonator” to perform such behaviors. In this research work, the four different behaviors of light i.e., fast, slow, stopping and storing of light where investigated using a ring resonator. Nowadays, stopping or cooling light beam has become the promising technique for atom/molecule trapping investigations (using static or dynamic tweezers), especially, after the announcement of Nobel Prize 2012 in Physics on the whispering gallery modes [2, 3]. There are two more kinds of devices that can be used to trap light beams, the use of microcavity arrays performed by Yanik and Fan [4], and nonlinear microring resonator by Yupapin and Pornsuwancharoen [5] for stopping light (laser beam). Nanyang Technological University scientists have also done experiment to slowing the light in microresonators using a microring system recently [6]. This concept is a concrete backbone for many applications.

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