Applications of Photonic Technology最新文献_第5页

3D inverse photonic crystal structures made from latex polystyrene micro-spheres and barium titanate 由乳胶聚苯乙烯微球和钛酸钡制成的三维逆光子晶体结构

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473837

I. Aboudihab, A. Tork, R. Lessard

引用次数: 2

All-Optical Transistor Action in Photonic Band Gap Materials 全光晶体管在光子带隙材料中的作用

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474416

M. Florescu, S. John

{"title":"All-Optical Transistor Action in Photonic Band Gap Materials","authors":"M. Florescu, S. John","doi":"10.1117/12.474416","DOIUrl":"https://doi.org/10.1117/12.474416","url":null,"abstract":"We describe all-optical transistor action in photonic band gap materials doped with active atoms. In the presence of a photonic band gap (PBG) material, a coherent laser beam with the frequency slightly detuned from the resonant atomic transition frequency can drive a collection of two-level atoms to an almost totally inverted state, a phenomenon strictly forbidden in ordinary vacuum. By changing the laser field intensity in the neighborhood of a threshold value, it is possible to drive the atomic system through a transition from states in which the atoms populate preferentially the ground level to almost totally inverted states. In this process, the atomic system switches from a passive medium (highly absorptive) to a active medium (highly amplifying). The switching action in a PBG material is not associated with operating near a narrow cavity resonance with conventional trade-off between switching time and switching threshold intensity. Rather it is associated with an abrupt discontinuity in the engineered broad band electromagnetic density of states of the PBG material. We demonstrate all-optical transistor action in PBG materials by analyzing the absorption spectrum of a second probe laser beam and we show that the probe beam experience a substantial differential gain by slight intensity modulations in the control laser field.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123386602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photoinduced dichroism in amorphous As2S3 thin film 非晶As2S3薄膜的光致二色性

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.478298

Benoit Paquet, K. Asatryan, T. Galstian, R. Vallée

引用次数: 1

Investigation of structural properties of carbon-epoxy composites using fiber-Bragg gratings 基于光纤光栅的碳-环氧复合材料结构性能研究

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473813

J. Grant, R. Kaul, S. L. Taylor, K.V. Jackson, A. Osei, Anup Sharma

引用次数: 1

Bi-soliton propagation in dispersion-managed system and its application 色散管理系统中的双孤子传播及其应用

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474402

A. Maruta, Takashi Inoue, Y. Nonaka, Y. Yoshika

引用次数: 1

Synthetic aperture, a way to high resolution active imaging 合成孔径，是实现高分辨率主动成像的一种方式

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474741

R. Binet, J. Colineau, J. Lehureau

引用次数: 2

Toward realization of photonic bandgap materials with glancing angle deposition 掠角沉积光子带隙材料的实现

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474337

G. Beydaghyan, K. Kaminska, Tim Brown, K. Robbie

{"title":"Toward realization of photonic bandgap materials with glancing angle deposition","authors":"G. Beydaghyan, K. Kaminska, Tim Brown, K. Robbie","doi":"10.1117/12.474337","DOIUrl":"https://doi.org/10.1117/12.474337","url":null,"abstract":"A modern challenge of materials science and physics is the creation and understanding of photonic crystals. Glancing Angle Deposition (GLAD) enables the growth of thin film materials with designable morphological structure on the scale of tens of nanometers, similar to proposed geometries of photonic crystals. Here we present recent progress toward the realization of photonic crystals with GLAD. Square spiral films of silicon were fabricated with GLAD, and were analyzed with scanning electron microscopy (SEM) and spectroscopic ellipsometry. The SEM images clearly show a periodic and spiral structure, similar to that recently predicted to have a robust three-dimensional bandgap. Ellipsometric analysis is ongoing, with as yet no distinct features that might suggest photonic bandgaps. To measure and control the in-plane ordering of silicon thin films, we have deposited and characterized pillar microstructures, producing an indirect measurement of film porosity with varying flux incidence. Two dimensional Fourier transforms were applied to plan view SEM images of porous pillar microstructures, showing no regular lattice but a broad ring that suggests a short range average spacing. In-plane periodicities were observed up to 100nm. Ongoing research is toward fabricating and analyzing photonic crystal structures at visible and infrared wavelengths.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127664827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polarization independent grating-coupling in planar wave-guide using photo-induced birefringence 基于光致双折射的平面波导偏振无关光栅耦合

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473826

D. Peyrot, T. Galstian, R. Lessard

{"title":"Polarization independent grating-coupling in planar wave-guide using photo-induced birefringence","authors":"D. Peyrot, T. Galstian, R. Lessard","doi":"10.1117/12.473826","DOIUrl":"https://doi.org/10.1117/12.473826","url":null,"abstract":"The effective refractive index of a guided wave depends on its polarization due to the anisotropic phase shift during the total internal reflection. Thus the grating-coupling angle is in general different for TM and TE polarized light. The compensation of this anisotropy is a difficult task. Some optical materials may present a significant birefringence when exposed to a polarized light. We would like to compensate the optical anisotropy using this photo-induced birefringence phenomenon, which would allow us to bring back the TM grating-coupling angle to the TE one. During these studies, we have developed an optical material, which allows us the formation of a relief grating via traditional light exposure techniques. At the same time, this material exhibits a significant photo-induced birefringence. This takes place thanks to the molecular reorientation phenomena after that the recording of the grating coupler is over. It is important to note that this last process does not affect significantly the grating-coupler. Furthermore we have observed that photo-induced birefringence present a strong reminiscence after the pump beam deactivation. The grating coupling experiments with and without the photo-induced phenomena were conducted.","PeriodicalId":342015,"journal":{"name":"Applications of Photonic Technology","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127999045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Fabrication of a fiber-optic tilted Bragg grating filter in 40 nm range with a single phase mask 用单相掩模制作40 nm范围内的光纤倾斜布拉格光栅滤波器

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.473812

J. Grant, Y. Wang, Anup Sharma

引用次数: 1

Interface electromagnetic waves between Kronig-Penney photonic crystals Kronig-Penney光子晶体之间的界面电磁波

Applications of Photonic Technology Pub Date : 2003-02-01 DOI: 10.1117/12.474743

K. Mehrany, B. Momeni, S. Khorasani, B. Rashidian

引用次数: 7