Resonantly Enhanced Infrared Up‐Conversion in Double‐Step Asymmetric Subwavelength Grating Structure

材料科学 红外线的 栅栏 光学 光电子学 衍射光栅 物理
作者
Lal Krishna Anitha Kumari Sreekantan Nair,Jyothsna Konkada Manattayil,Jayanta Deka,Rabindra Biswas,Varun Raghunathan
出处
期刊:Advanced Optical Materials [Wiley]
标识
DOI:10.1002/adom.202401070
摘要

Abstract The design and experimental demonstration of double‐step, 1D amorphous germanium grating structures supporting quasi bound‐states‐in‐continuum (quasi‐BIC) resonance at 3.2 µm wavelength and its application to third‐order sum‐frequency generation‐based up‐conversion are reported. Linear transmission measurements on the fabricated metasurface with loosely focussed excitation spanning 0–3° angles show very good agreement with ideal plane‐wave excitation of the periodic photonic structure. TSFG measurements performed on the same structures with tightly focusing mid‐infrared signal and pump beams using a reflective‐type objective with 15–40° angular excitation show ≈375 times enhancement with significant blue‐shift in the resonance feature by ≈300 nm. To understand this excitation angle dependence of the resonance characteristics, a generalized plane‐wave expansion (PWE) model is developed by considering varying excitation angle plane‐waves incident on the metasurface with a discretized angular spectrum representation used to coherently combine the resultant electric and magnetic fields to obtain the linear transmission characteristics and nonlinear TSFG spectra. The PWE method is found to be particularly effective in modeling linear and nonlinear responses under realistic illumination conditions while ensuring optimal utilization of computational resources. Good agreement is obtained between the PWE simulations, linear transmission, and nonlinear TSFG measurements by considering appropriate angular excitation.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
淡淡博完成签到 ,获得积分10
刚刚
wjxcl发布了新的文献求助10
刚刚
2秒前
sdl发布了新的文献求助10
2秒前
emmm完成签到 ,获得积分10
3秒前
十三发布了新的文献求助10
3秒前
4秒前
4秒前
liangmh完成签到,获得积分10
4秒前
一二不休完成签到,获得积分10
4秒前
123发布了新的文献求助10
5秒前
7秒前
ding应助黑熊安巴尼采纳,获得10
8秒前
Ava应助wjxcl采纳,获得10
8秒前
闪闪如南发布了新的文献求助10
8秒前
深情安青应助一二不休采纳,获得10
9秒前
11秒前
123完成签到,获得积分10
11秒前
不扯先生完成签到,获得积分10
12秒前
柳絮完成签到,获得积分20
13秒前
lll完成签到,获得积分10
13秒前
sdl完成签到,获得积分10
13秒前
Orange应助孟婆的碗采纳,获得10
14秒前
zhangmy1989发布了新的文献求助30
14秒前
14秒前
清秀的不言完成签到 ,获得积分10
14秒前
杂化轨道退役研究员完成签到,获得积分10
14秒前
FashionBoy应助tanglu采纳,获得10
15秒前
16秒前
闪闪如南完成签到,获得积分10
17秒前
wjxcl完成签到,获得积分10
18秒前
18秒前
18秒前
12233完成签到,获得积分10
19秒前
19秒前
洪武完成签到,获得积分20
19秒前
20秒前
Yuantian发布了新的文献求助10
21秒前
传奇3应助浪花淘尽英雄采纳,获得10
22秒前
流川枫完成签到,获得积分10
22秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038569
求助须知:如何正确求助?哪些是违规求助? 3576279
关于积分的说明 11374944
捐赠科研通 3305979
什么是DOI,文献DOI怎么找? 1819354
邀请新用户注册赠送积分活动 892698
科研通“疑难数据库(出版商)”最低求助积分说明 815048