Design and fabrication of capacitive micromachined optical focusing deformable MEMS mirrors for ultrafast tunable focusing (Conference Presentation)

2018 ◽  
Author(s):  
Afshin Kashani Ilkhechi ◽  
Benjamin Greenlay ◽  
Christopher Ceroici ◽  
Mohammad Maadi ◽  
Parsin Hajireza ◽  
...  
Keyword(s):  
Optical Focusing

Bironchigram processing method for quantitative evaluation of optical focusing mirrors

2019 ◽  
Vol 113 ◽  
pp. 47-54
Author(s):  
Gustavo Rodríguez ◽  
Jesús Villa ◽  
Rumen Ivanov ◽  
Ismael de la Rosa ◽  
Jorge Luis Flores
Keyword(s):  
Quantitative Evaluation ◽  
Processing Method ◽  
Optical Focusing

scholarly journals Plasmonics in semiconductors and in Ag submicron wires and graphene

2016 ◽  
Vol 55 (4) ◽  
Author(s):  
Hans Hartnagel ◽  
Shihab Al-Daffaie ◽  
Oktay Yilmazoglu
Keyword(s):  
Continuous Wave ◽  
Silver Nanowires ◽  
Field Enhancement ◽  
New Device ◽  
Domain Structures ◽  
New Concepts ◽  
Metal Nanostructure ◽  
Thz Sources ◽  
Nitrogen Ion ◽  
Optical Focusing

Some 50 years ago discussions of plasmonics in semiconductors lead to many new concepts such as travelling domain structures with applications leading even to logic systems. Now plasmonics of submicron wires of Ag and graphene bring new device concepts for the fabrication of compact THz sources and optical focusing of the beat signal into the active area. Here as an experimental example such new opportunities are involved with compact THz sources based on optical laser mixing. They include resonant plasmonic structures at THz and optical frequencies to locally enhance the electromagnetic fields at THz as well as optical frequencies by the combination of semiconductor-graphene plasmons respectively by the semiconductor-metal-nanostructure plasmons. Of particular interest is the usage of graphene, which is optically transmitting and which is either a semimetal or can be transformed into a semiconductor by reducing the width of its strips to about 30 nm, opening a band gap in the meV to tens of the meV range. A successful experimental structure for continuous-wave THz photomixing is fabricated using 1D and 2D nanocontacts either on low-temperature-grown (LTG) GaAs or on nitrogen ion-implanted (N+i) GaAs and graphene sheets. The overlaying 1D and 2D nanocontacts were formed by silver nanowires with a diameter of 60 or 120 nm. They can handle currents of >10 and >30 mA, respectively, without electromigration enabling reliably high photocurrents and field enhancement at THz frequencies by plasmonic effects. The nanomaterial structurization in connection with present-day plasmonic applications is now to be discussed in a similar manner as past opportunities with semiconductor plasmonics.

scholarly journals Time-reversed magnetically controlled perturbation (TRMCP) optical focusing inside scattering media

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Zhipeng Yu ◽  
Jiangtao Huangfu ◽  
Fangyuan Zhao ◽  
Meiyun Xia ◽  
Xi Wu ◽  
...  
Keyword(s):  
Scattering Media ◽  
Optical Focusing

Laser Breakdown-Generated Sound in Different Optical Focusing Lens Systems

2009 ◽  
Vol 29 (5) ◽  
pp. 1384-1390
Author(s):  
宗思光 Zong Siguang ◽  
王江安 Wang Jiangan
Keyword(s):  
Laser Breakdown ◽  
Optical Focusing ◽  
Focusing Lens

Simplified optical focusing design method applied to laser micro ablation

2018 ◽  
Vol 47 (9) ◽  
pp. 906007
Author(s):  
常 浩 Chang Hao ◽  
叶继飞 Ye Jifei ◽  
李南雷 Li Nanlei ◽  
周伟静 Zhou Weijing
Keyword(s):  
Design Method ◽  
Optical Focusing

scholarly journals High-speed single-shot optical focusing through dynamic scattering media with full-phase wavefront shaping

2017 ◽  
Vol 111 (22) ◽  
pp. 221109 ◽  
Author(s):  
Ashton S. Hemphill ◽  
Yuecheng Shen ◽  
Yan Liu ◽  
Lihong V. Wang
Keyword(s):  
High Speed ◽  
Single Shot ◽  
Scattering Media ◽  
Wavefront Shaping ◽  
Optical Focusing ◽  
Dynamic Scattering
Sign in / Sign up

Export Citation Format

Share Document