HOME > プロフィール > アフシャン ベガム アフシャン ベガム
- Address
- 305-0044 茨城県つくば市並木1-1 [アクセス]
研究内容
- Keywords
Topological Photonics, Photonic Crystals, Optical waveguides, Silicon & GaAs material, FEM computation
My technical interests in very wide terms is Topological Photonics, creating a one-way photonic waveguide paving way to a secure quantum network for communication & monetary transaction. It includes study of photons, their chiral nature, one-way waveguides & its fabrication. I focus on realizing Photonic Crystal Dirac cones in Silicon and Gallium Arsenide. Dirac cones are known for their linear dispersion, which will aid in creating lossless waveguides by exploring topological aspects. My analysis methodology includes semi-analytical modelling of secular equations for dispersion in waveguides, mathematical analysis by FEM & MATLAB. I have fabricated Photonic Crystal arrays, grating couplers & line-defect waveguides by CMOS-compatible techniques in SOI. Currently, I am learning thin film deposition & analysis techniques for Silicon Dioxide, to enhance light coupling to waveguides.
Grating in Silicon wafer, aspect ratio of 60 nm / 60 nm.
Fabrication date 08 January 2021
出版物2004年以降のNIMS所属における研究成果や出版物を表示しています。
論文
- Afshan Begum, Yuanzhao Yao, Takashi Kuroda, Eiichiro Watanabe, Naoki Ikeda, Yoshimasa Sugimoto, Yoshihiko Takeda, Kazuaki Sakoda. Observation of Two-dimensional Isotropic Double Dirac Cones in the Electromagnetic Dispersion Relation. Journal of the Physical Society of Japan. 91 [8] (2022) 10.7566/jpsj.91.084401
口頭発表
- AFSHAN BEGUM, Afshan Begum, YAO, Yuanzhao, KURODA, Takashi, WATANABE, Eiichiro, SUGIMOTO, Yoshimasa, TAKEDA, Yoshihiko, SAKODA, Kazuaki. Angle-resolved reflection spectra of double Dirac-cone materialized in SOI photonic crystal slabs by accidental degeneracy. 日本物理学会第77回年次大会 https://jps.or.jp/activities/meetings/annual/annual-index.php. 2022
- AFSHAN BEGUM, Afshan Begum, YAO, Yuanzhao, KURODA, Takashi, WATANABE, Eiichiro, SUGIMOTO, Yoshimasa, TAKEDA, Yoshihiko, SAKODA, Kazuaki. Observation of photonic band dispersion with high angle-resolution reflection measurements. NIMS先端計測シンポジウム2022 https://www.nims.go.jp/research/materials-analysis/events/amcp_sympo2022.html. 2022
- シティ ハリマ シティ ハリマ, 姚 遠昭, 池田 直樹, アフシャン ベガム アフシャン ベガム, Kei Kaneko, Rei Hashimoto, Tsutomu Kakuno, Shinji Saito, 黒田 隆, 杉本 喜正, 迫田 和彰. Midinfrared angle-resolved reflection measurement of two-dimensional photonic crystal slabs for their application to surface emitting quantum cascade lasers. The 13th International Symposium on Modern Optics and Its Applications (ISMOA 2021) / https://ismoa.indonesianoptics.org . 2021
所属学会
Japan Physical Society, SPIE, OSA - The Optical Society, Institute of Electrical and Electronics Engineers, Optical Society of India, American Physical Society
受賞履歴
- NIMS Student Seminar Award, Doctoral course, year 2. Title, "Scheme to utilize Photonic Crystal Dirac Cone for waveguiding & lasing demonstration" (2020)
- NIMS Student Seminar Award, Doctoral course, year 1. Title, "Topological Waveguide for Entangled Photon Pair Dissociation" (2019)