scholarly journals Nanoscale field effect optical modulators based on depletion of epsilon-near-zero films

2016 ◽  
Vol 381 ◽  
pp. 18-23 ◽  
Author(s):  
Zhaolin Lu ◽  
Kaifeng Shi ◽  
Peichuan Yin
Keyword(s):  
Field Effect ◽  
Optical Modulators ◽  
Epsilon Near Zero

Field-Effect Tunable and Broadband Epsilon-Near-Zero Perfect Absorbers with Deep Subwavelength Thickness

ACS Photonics ◽  
2018 ◽  
Vol 5 (7) ◽  
pp. 2631-2637 ◽  
Author(s):  
Aleksei Anopchenko ◽  
Long Tao ◽  
Catherine Arndt ◽  
Ho Wai Howard Lee
Keyword(s):  
Field Effect ◽  
Perfect Absorbers ◽  
Epsilon Near Zero

Tunable magnetization of infrared epsilon-near-zero media via field-effect modulation

2018 ◽  
Vol 112 (18) ◽  
pp. 181104 ◽  
Author(s):  
Mohammad Mahdi Salary ◽  
Hossein Mosallaei
Keyword(s):  
Field Effect ◽  
Epsilon Near Zero

scholarly journals Measurements of electrically tunable refractive index of MoS2 monolayer and its usage in optical modulators

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Vasyl G. Kravets ◽  
Fan Wu ◽  
Gregory H. Auton ◽  
Tongcheng Yu ◽  
Shinji Imaizumi ◽  
...  
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Field Effect ◽  
Binding Energies ◽  
Great Promise ◽  
Electric Field Effect ◽  
Light Modulation ◽  
Molybdenum Disulphide ◽  
Optical Modulators ◽  
Mos2 Monolayer

Abstract Two-dimensional materials hold a great promise for developing extremely fast, compact and inexpensive optoelectronic devices. A molybdenum disulphide (MoS2) monolayer is an important example which shows strong, stable and gate tunable optical response even at room temperature near excitonic transitions. However, optical properties of a MoS2monolayer are not documented well. Here, we investigate the electric field effect on optical properties of a MoS2 monolayer and extract the dependence of MoS2 optical constants on gating voltage. The field effect is utilised to achieve ~10% visible light modulation for a hybrid electro-optical waveguide modulator based on MoS2. A suggested hybrid nanostructure consists of a CMOS compatible Si3N4 dielectric waveguide sandwiched between a thin gold film and a MoS2 monolayer which enables a selective enhancement of polarised electro-absorption in a narrow window of angles of incidence and a narrow wavelength range near MoS2 exciton binding energies. The possibility to modulate visible light with 2D materials and the robust nature of light modulation by MoS2 could be useful for creation of reliable ultra-compact electro-optical hybrid visible-light modulators.

New polarized-light microscope for fast and orientation independent measurement of birefringent fine structure

1993 ◽  
Vol 51 ◽  
pp. 82-83
Author(s):  
Rudolf Oldenbourg
Keyword(s):  
Light Microscope ◽  
Polarized Light ◽  
Video Camera ◽  
Limited Range ◽  
Image Point ◽  
Computer Assisted ◽  
Optical Modulators ◽  
Anisotropic Structures ◽  
Long Time ◽  
Computer Assisted Image

The polarized light microscope has the unique potential to measure submicroscopic molecular arrangements dynamically and non-destructively in living cells and other specimens. With the traditional pol-scope, however, single images display only those anisotropic structures that have a limited range of orientations with respect to the polarization axes of the microscope. Furthermore, rapid measurements are restricted to a single image point or single area that exhibits uniform birefringence or other form of optical anisotropy, while measurements comparing several image points take an inordinately long time.We are developing a new kind of polarized light microscope which combines speed and high resolution in its measurement of the specimen anisotropy, irrespective of its orientation. The design of the new pol-scope is based on the traditional polarized light microscope with two essential modifications: circular polarizers replace linear polarizers and two electro-optical modulators replace the traditional compensator. A video camera and computer assisted image analysis provide measurements of specimen anisotropy in rapid succession for all points of the image comprising the field of view.

Sign in / Sign up

Export Citation Format

Share Document