Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Broadband Spectral Splitting of Light Using Wavefront Shaping
Date
2018-09-12
Author
Gün, Berk Nezir
Yüce, Emre
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
157
views
0
downloads
Cite This
When the dimensions of a medium are comparable to wavelength of light, diffraction plays a major role in wave propagation and it differs by wavelength. Thus, it is possible to obtain intended phase difference for each frequency by changing the thickness or refractive index of the medium [1]. As a result, waves at a specific frequency can be controlled to constructively interfere at a desired point. Liquid crystal displays, which enable to control refractive indices of each pixels via modulating the amplitude of the applied electric field can be used to control diffraction. By this programmable control, the spatial phase of light can be changed between 0-2π and the phase pattern for spectral splitting can be determined [2]. Our theoretical results show that spectral splitting is achieved with total efficiency of more than 70% when we focus two different wavelengths to two different regions. In addition, for non-moving sources the total relative intensity of 400 nm light focuses properly to a region by 45%, and by 30% at 0.004° incidence angle [3].
URI
https://hdl.handle.net/11511/92404
Conference Name
20. Ulusal Optik, Elektro-Optik ve Fotonik Çalıştayı
Collections
Department of Physics, Conference / Seminar
Suggestions
OpenMETU
Core
Broadband Spectral Splitting of Light Using a Spatial Light Modulator
Gün, Berk Nezir; Yüce, Emre (2019-09-04)
Diffraction arises whenever the wavelength of light and dimensions of a medium show congruence in size. To control diffraction, one can arrange the thickness of the medium considering theoretical calculations or refractive index of the medium. Spatial Light Modulators (SLM) provide the means to control the refractive index of a liquid crystal media. The liquid crystal displays (LCD) in SLM have birefringence property that can alter the time inside the device to get constructive or destructive interferen...
Optical classification and reconstruction through multimode fibers
Kürekci, Şahin; Yüce, Emre; Department of Physics (2022-12)
When a light beam travels through a highly scattering medium, two-dimensional random intensity distributions (speckle patterns) are formed due to the complex scattering within the medium. Although they contain valuable information about the input signal and the characteristics of the propagation medium, the speckle patterns are difficult to unscramble, which makes imaging through scattering media an extremely challenging task. Multimode fibers behave similarly to scattering media since they scramble the inp...
Short term variations of total electron content (TEC) fitting to a regional GPS network over the Kingdom of Saudi Arabia (KSA)
Alothman, A. O.; Alsubaie, M. A.; Ayhan, M. E. (Elsevier BV, 2011-09-01)
The ionosphere is a dispersive medium for radio waves with the refractive index which is a function of frequency and total electron content (TEC). TEC has a strong diurnal variation in addition to monthly, seasonal and solar cycle variations and small and large scale irregularities. Dual frequency GPS observations can be utilized to obtain TEC and investigate its spatial and temporal variations. We here studied short term TEC variations over the Kingdom of Saudi Arabia (KSA). A regional GPS network is forme...
INFRARED REFLECTIVITY SPECTRA OF TLGAS2-TYPE LAYER CRYSTALS
Hasanlı, Nızamı; RAGIMOV, AS; TAGIROV, VI; GUSEINOV, RE (Elsevier BV, 1982-01-01)
Infrared reflectivity spectra of TIGaS2, TIGaSe2 and TlInS2 layer crystals are measured for the polarization directions perpendicular and parallel to the optical c-axis in the spectral range from 20 to 400 cm-1. The optical dispersion parameters are obtained for both polarization directions. Besides, normal coordinates and effective force constants are determined for high-frequency lattice vibrations.
Optical absorption and reflection studies of Tl4InGa3S8 layered single crystals
Goksen, K.; Hasanlı, Nızamı; Ozkan, H. (Institute of Physics, Polish Academy of Sciences, 2007-07-01)
The optical properties of Tl4InGa3S8 layered single crystals have been studied by means of transmission and reflection measurements in the wavelength region between 400 and 1100 nm. The analysis of the room temperature absorption data revealed the presence of both optical indirect and direct transitions with band gap energies of 2.40 and 2.61 eV, respectively. Transmission measurements carried out in the temperature range of 10-300 K revealed the rate of change of the indirect band gap with temperature as g...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
B. N. Gün and E. Yüce, “Broadband Spectral Splitting of Light Using Wavefront Shaping,” presented at the 20. Ulusal Optik, Elektro-Optik ve Fotonik Çalıştayı, Ankara, Türkiye, 2018, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/92404.