Computation and Modeling for Advanced Science and Technology

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國立成功大學「邁向頂尖大學計畫」

  延攬優秀人才工作報告表

Work Report Form for Distinguished Scholars □續聘continuation of employment ■離職resignation

100 年 7 月 13 日更新 受聘者姓名

Name of the Employee

Goncharenko, Anatolii ■男 �女 Male Female 聘 期 Period of Employment from 2016 年(y)10 月(m) 17 日(d) to 2016 年(y) 12 月(m) 31 日(d) 研究或教學或科技研發與 管理計畫名稱

The project title of research, teaching, technology development and management

Computation and Modeling for Advanced Science and Technology 計畫主持人 （申請單位主管） Project Investigator (Head of Department/Center) Yia-Chung Chang 補助延聘編號

Grant Number HUA 105- 3 - 2 -138

一、 研究、教學、科技研發與管理工作全程經過概述。（由受聘人填寫）

Please summarize the entire research, teaching, or science and technology R&D and management work process (To be

completed by the employee)

The work has dealt with computational design of one-dimensional nanostructures which are able to support both extraordinary high- and low-momentum lossless plasmonic modes. The solution of the Rytov dispersion equation, which corresponds to an unlimited wave vector and hence to an infinite refractive index, has been shown to occur for the TM polarization only. Two problems, which are especially important for the nanolaser design and sensor applications, have been dealt with: (i) how to get the effective permittivity as high as possible and (ii) how to get the full loss compensation with gain as small as possible. It has been shown that dealing with a semiconductor with a smaller background permittivity allows one to achieve the full loss compensation at a smaller gain coefficient, but this reduces the effective refractive index. Thus, the choice of the gain material can be seen as a trade-off between the conditions of the loss compensation and maximum refractive index.

The solution, which corresponds to the zero wave vector (ENZ regime), has been shown to occur for both the TE and TM polarizations. The TM polarized mode in this case is nothing but the so-called additional (extraordinary) wave, which results from strong nonlocality and cannot be excited at normal light incidence. At the same time, using an analog of electromagnetically induced transparency, the realization of the ENZ regime, as well as refractive-index-near-unity regime is shown to be feasible when dealing with the TE polarized modes after reducing the semiconductor background permittivity and enlarging the period of the lattice. These results are further supported by numerical simulations with the use of rigorous coupled wave analysis for the TE polarized normally incident radiation and a slab made of refractive-index-near-unity metamaterial. The reflectance close to zero and the transmittance close to unity have been obtained for such a slab independently of the slab thickness. Finally, an approximate analytical solution of the Rytov dispersion equation has been derived which is superior to earlier approximate solutions.

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二、研究或教學或科技研發與管理成效評估（由計畫主持人或單位主管填寫）

Please evaluate the performance of research, teaching or science and technology R&D and management Work: (To be completed

by Project Investigator or Head of Department/Center)

(1)是否達到延攬預期目標？

Has the expected goal of recruitment been achieved?

(2)研究或教學或科技研發與管理的方法、專業知識及進度如何？

What are the methods, professional knowledge, and progress of the research, teaching, or R&D and management work?

(3)受延攬人之研究或教學或科技研發與管理成果對該計畫(或貴單位)助益如何？

How have the research, teaching, or R&D and management results of the employed person given benefit to the project (or your unit)?

(4)受延攬人於補助期間對貴單位或國內相關學術科技領域助益如何？

How has the employed person, during his or her term of employment, benefited your unit or the relevant domestic academic field?

(5)具體工作績效或研究或教學或科技研發與管理成果：

Please describe the specific work performance, or the results of research, teaching, or R&D and management work:

(6)是否續聘受聘人? Will you continue hiring the employed person? □續聘Yes □不續聘No

※ 此報告表篇幅以三～四頁為原則。This report form should be limited to 3-4 pages in principle.

※ 此表格可上延攬優秀人才成果報告繳交說明網頁下載。