High-efficiency light modulator using guided-to-radiation mode coupling in a graded-index waveguide

1986 ◽  
Vol 25 (13) ◽  
pp. 2175 ◽  
Author(s):  
Hidetoshi Onodera ◽  
Masamitsu Nakajima
Keyword(s):  
Mode Coupling ◽  
High Efficiency ◽  
Light Modulator ◽  
Radiation Mode ◽  
Graded Index

High-efficiency light modulator using guided-to-radiation mode coupling: a proposal

1981 ◽  
Vol 20 (14) ◽  
pp. 2439 ◽  
Author(s):  
Masamitsu Nakajima ◽  
Hidetoshi Onodera ◽  
Ikuo Awai ◽  
Jun-ichi Ikenoue
Keyword(s):  
Mode Coupling ◽  
High Efficiency ◽  
Light Modulator ◽  
Radiation Mode

scholarly journals Direct evidence of tilted Bragg grating azimuthal radiation mode coupling mechanisms

2009 ◽  
Vol 17 (16) ◽  
pp. 14075 ◽  
Author(s):  
Robert B. Walker ◽  
Stephen J. Mihailov ◽  
Dan Grobnic ◽  
Ping Lu ◽  
Xiaoyi Bao
Keyword(s):  
Mode Coupling ◽  
Direct Evidence ◽  
Bragg Grating ◽  
Radiation Mode ◽  
Coupling Mechanisms

Light intensity modulation based on guided-to-radiation mode coupling in heterostructure waveguides

1984 ◽  
Vol 23 (1) ◽  
pp. 118 ◽  
Author(s):  
Hidetoshi Onodera ◽  
Ikuo Awai ◽  
Masamitsu Nakajima ◽  
Junichi Ikenoue
Keyword(s):  
Light Intensity ◽  
Mode Coupling ◽  
Intensity Modulation ◽  
Radiation Mode

scholarly journals Principal Modes in Graded-Index Multimode Fiber in Presence of Spatial- and Polarization-Mode Coupling

2009 ◽  
Vol 27 (10) ◽  
pp. 1248-1261 ◽  
Author(s):  
Mahdieh B. Shemirani ◽  
Wei Mao ◽  
Rahul Alex Panicker ◽  
Joseph M. Kahn
Keyword(s):  
Mode Coupling ◽  
Polarization Mode ◽  
Multimode Fiber ◽  
Graded Index

scholarly journals Off-Resonant Absorption Enhancement in Single Nanowires via Graded Dual-Shell Design

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1740 ◽  
Author(s):  
Wenfu Liu ◽  
Xiaolei Guo ◽  
Shule Xing ◽  
Haizi Yao ◽  
Yinling Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Efficiency ◽  
Light Trapping ◽  
Resonant Absorption ◽  
Photocurrent Density ◽  
Absorption Enhancement ◽  
Graded Index ◽  
Shell Design ◽  
Transition Modes ◽  
Single Nanowires

Single nanowires (NWs) are of great importance for optoelectronic applications, especially solar cells serving as powering nanoscale devices. However, weak off-resonant absorption can limit its light-harvesting capability. Here, we propose a single NW coated with the graded-index dual shells (DSNW). We demonstrate that, with appropriate thickness and refractive index of the inner shell, the DSNW exhibits significantly enhanced light trapping compared with the bare NW (BNW) and the NW only coated with the outer shell (OSNW) and the inner shell (ISNW), which can be attributed to the optimal off-resonant absorption mode profiles due to the improved coupling between the reemitted light of the transition modes of the leak mode resonances of the Si core and the nanofocusing light from the dual shells with the graded refractive index. We found that the light absorption can be engineered via tuning the thickness and the refractive index of the inner shell, the photocurrent density is significantly enhanced by 134% (56%, 12%) in comparison with that of the BNW (OSNW, ISNW). This work advances our understanding of how to improve off-resonant absorption by applying graded dual-shell design and provides a new choice for designing high-efficiency single NW photovoltaic devices.

scholarly journals Characterization of a high efficiency, ultrashort pulse shaper incorporating a reflective 4096-element spatial light modulator

2007 ◽  
Vol 278 (2) ◽  
pp. 368-376 ◽  
Author(s):  
Jeffrey J. Field ◽  
Thomas A. Planchon ◽  
Wafa Amir ◽  
Charles G. Durfee ◽  
Jeff A. Squier
Keyword(s):  
Ultrashort Pulse ◽  
Spatial Light Modulator ◽  
High Efficiency ◽  
Pulse Shaper ◽  
Light Modulator

Radiation-mode coupling loss in tilted fiber phase gratings

1995 ◽  
Vol 20 (18) ◽  
pp. 1838 ◽  
Author(s):  
T. Erdogan ◽  
J. E. Sipe
Keyword(s):  
Mode Coupling ◽  
Coupling Loss ◽  
Radiation Mode
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