Continuous-relief diffractive microlenses for laser beam focusing

被引：6

作者：

Day, Matthew ^{[1
,2
,3
]}

Choonee, Kaushal ^{[1
]}

Cox, David ^{[1
,4
]}

Thompson, Mark ^{[2
]}

Marshall, Graham ^{[2
]}

Sinclair, Alastair G. ^{[1
]}

机构：

[1] Natl Phys Lab, Teddington TW11 0LW, Middx, England

[2] Univ Bristol, Quantum Engn Technol Labs, Bristol BS8 1FD, Avon, England

[3] Univ Bristol, Quantum Engn Ctr Doctoral Training, Bristol BS8 1FD, Avon, England

[4] Univ Surrey, Adv Technol Inst, Guildford GU2 7XH, Surrey, England

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 22期

基金：

英国工程与自然科学研究理事会;

关键词：

OPTICAL-ELEMENTS; MONOLITHIC ARRAY; TRAPPED IONS; LENS; LITHOGRAPHY; FABRICATION; INTEGRATION; CHIP; TECHNOLOGY; PROFILE;

D O I：

10.1364/OE.25.026987

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Microscale, continuous-profile, diffractive lenses have been fabricated and characterized. Lenses designed to operate at lambda(0) = 405 nm were created by focused ion beam milling of a glass substrate. The micro-structured profile was analysed by confocal microscopy and optical performance was quantified by measurements of the transmitted laser beam profile. Lenses of size 125 mu m x 125 mu m, containing up to 18 annuli and focusing at 400 mu m, 450 mu m and 500 mu m have been made. Measured focused beams were in excellent agreement with the predicted performance. A maximum diffraction efficiency of 84 % and side-lobe suppression down to the 10(-4) level can be achieved. The suitability of the lenses for interfacing with trapped-ion systems is outlined. (C) 2017 Optical Society of America

引用

页码：26987 / 26999

页数：13

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