scholarly journals Chiral modes near exceptional points in symmetry broken H1 photonic crystal cavities

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
C. F. Fong ◽  
Y. Ota ◽  
Y. Arakawa ◽  
S. Iwamoto ◽  
Y. K. Kato
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Cavities ◽  
Exceptional Points

Unidirectional reflectionlessness and nonreciprocal perfect absorption in optical waveguide system based on phase coupling between two photonic crystal cavities

2018 ◽  
Vol 27 (01) ◽  
pp. 1850004 ◽  
Author(s):  
Shu Jing Liu ◽  
Cong Zhang ◽  
Ruiping Bai ◽  
Xintong Gu ◽  
Hong Da Yin ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Waveguide ◽  
Quality Factors ◽  
Phase Coupling ◽  
High Quality ◽  
Perfect Absorption ◽  
Photonic Crystal Cavities ◽  
Exceptional Points ◽  
Waveguide System ◽  
Distance Formula

We demonstrate the unidirectional reflectionlessness at exceptional points (EPs) and nonreciprocal perfect absorption near EPs based on phase coupling between two photonic crystal cavities (PCCs) in optical waveguide. In our scheme, when distance [Formula: see text][Formula: see text]nm ([Formula: see text][Formula: see text]nm), the reflectivities for forward and backward (backward and forward) directions are closed to [Formula: see text] and [Formula: see text] ([Formula: see text] and [Formula: see text]), respectively, and absorptances of the nonreciprocal perfect absorptions for forward and backward directions are [Formula: see text] and [Formula: see text] with the high quality factors of [Formula: see text] and [Formula: see text], respectively.

scholarly journals Tunable non-Hermiticity in Coupled Photonic Crystal Cavities with Asymmetric Optical Gain

2020 ◽  
Vol 10 (22) ◽  
pp. 8074
Author(s):  
Kyoung-Ho Kim ◽  
Muhammad Sujak ◽  
Evan S. H. Kang ◽  
You-Shin No
Keyword(s):  
Optical Properties ◽  
Phase Transitions ◽  
Photonic Crystal ◽  
Coupling Strength ◽  
Optical Gain ◽  
Linear Defect ◽  
Photonic Crystal Cavities ◽  
Exceptional Points ◽  
Key Factor ◽  
Cavity System

We report a rationally designed coupled photonic crystal (PhC) cavity system that comprises two identical linear defect nanocavities, and we numerically investigate the controllable non-Hermitian optical properties of the eigenmodes of the nanocavities. Three different coupling schemes, namely, the tuning of the sizes of shared airholes, vertical shifting of one of the nanocavities, and lateral shifting of one of the nanocavities, are proposed. We examined the ability of these schemes to control the coupling strength between component cavities, which is a key factor that determines the non-Hermiticity of the system. Moreover, we introduce controlled levels of spatially asymmetric optical gain to the coupled PhC cavity by employing the vertical shifting scheme and independently tuning the gain and loss of individual nanocavities. Consequently, we successfully achieve the correspondingly tuned non-Hermitian behaviors of complex eigenfrequencies, such as the controlled emergence of phase transitions at exceptional points and the asymmetric development of amplified and decayed eigenmodes.

scholarly journals Spectroscopy of 1.55μm PbS quantum dots on Si photonic crystal cavities with a fiber taper waveguide

2010 ◽  
Vol 96 (16) ◽  
pp. 161108 ◽  
Author(s):  
M. T. Rakher ◽  
R. Bose ◽  
C. W. Wong ◽  
K. Srinivasan
Keyword(s):  
Quantum Dots ◽  
Photonic Crystal ◽  
Photonic Crystal Cavities ◽  
Fiber Taper ◽  
Pbs Quantum Dots

Analysis of Q-factors of structural imperfections in triangular cross-section nanobeam photonic crystal cavities

2015 ◽  
Vol 32 (9) ◽  
pp. 1792 ◽  
Author(s):  
Yuki Yamaguchi ◽  
Seung-Woo Jeon ◽  
Bong-Shik Song ◽  
Yoshinori Tanaka ◽  
Takashi Asano ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Cross Section ◽  
Photonic Crystal Cavities ◽  
Triangular Cross Section ◽  
Q Factors ◽  
Structural Imperfections

Out-of-plane nanomechanical tuning of double-coupled one-dimensional photonic crystal cavities

2013 ◽  
Vol 38 (12) ◽  
pp. 2005 ◽  
Author(s):  
Feng Tian ◽  
Guangya Zhou ◽  
Yu Du ◽  
Fook Siong Chau ◽  
Jie Deng ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Cavities ◽  
One Dimensional ◽  
Dimensional Photonic Crystal ◽  
Out Of Plane
Sign in / Sign up

Export Citation Format

Share Document