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Precise photoelectrochemical tuning of semiconductor microdisk lasers 被引量:3
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作者 Debarghya Sarkar Paul HDannenberg +3 位作者 Nicola Martino Kwon-Hyeon Kim Yue Wu Seok-Hyun Yun 《Advanced Photonics》 SCIE EI CAS CSCD 2023年第5期68-76,共9页
Micro-and nanodisk lasers have emerged as promising optical sources and probes for on-chip and free-space applications.However,the randomness in disk diameter introduced by standard nanofabrication makes it challengin... Micro-and nanodisk lasers have emerged as promising optical sources and probes for on-chip and free-space applications.However,the randomness in disk diameter introduced by standard nanofabrication makes it challenging to obtain deterministic wavelengths.To address this,we developed a photoelectrochemical(PEC)etching-based technique that enables us to precisely tune the lasing wavelength with subnanometer accuracy.We examined the PEC mechanism and compound semiconductor etching rate in diluted sulfuric acid solution.Using this technique,we produced microlasers on a chip and isolated particles with distinct lasing wavelengths.These precisely tuned disk lasers were then used to tag cells in culture.Our results demonstrate that this scalable technique can be used to produce groups of lasers with precise emission wavelengths for various nanophotonic and biomedical applications. 展开更多
关键词 microdisk lasers SEMICONDUCTOR precision lasing photoelectrochemical etching laser particle NANOPHOTONICS
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Electrically pumped metallic and plasmonic nanolasers 被引量:3
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作者 Martin T Hill 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第11期158-166,共9页
In recent years, there have been a significant number of demonstrations of small metallic and plasmonic lasers. The vast majority of these demonstrations have been for optically pumped devices. Electrically pumped dev... In recent years, there have been a significant number of demonstrations of small metallic and plasmonic lasers. The vast majority of these demonstrations have been for optically pumped devices. Electrically pumped devices are advantageous for applications and could demonstrate concepts not amenable for optical pumping. However, there have been relatively few demonstrations of electrically pumped small metal cavity lasers. This lack of results is due to the following reasons: there are limited types of electrically pumped gain media available; there is a significantly greater level of complexity required in the fabrication of electrically pumped devices; finally, the required components for electrical pumping restrict cavity design options and furthermore make it intrinsically more difficult to achieve lasing. This review looks at the motivation for electrically pumped nanolasers, the key issues that need addressing for them to be realized, the results that have been achieved so far including devices where lasing has not been achieved, and potential new directions that could be pursued. 展开更多
关键词 semiconductor lasers laser diode microcavity and microdisk laser integrated optics
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Mode characteristics of VCSELs with different shape and size oxidation apertures 被引量:1
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作者 谢新宇 李健 +3 位作者 邱小浪 王永丽 李川川 韦欣 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第4期347-351,共5页
Vertical cavity surface emitting laser(VCSELs)as the ideal light source for rubidium(Rb)and cesium(Cs)atomic clocks is analyzed for its mode and polarization control.We fabricated three kinds of shapes:triangular,elli... Vertical cavity surface emitting laser(VCSELs)as the ideal light source for rubidium(Rb)and cesium(Cs)atomic clocks is analyzed for its mode and polarization control.We fabricated three kinds of shapes:triangular,elliptic,and circular oxidation apertures which also have different sizes.We formed three different shape oxide apertures by wetoxidation with 36μm-39μm circular mesa.Our results show that triangular oxidized-VCSEL has the advantages of mode and polarization selection over elliptic and circular oxide apertures.When triangular oxide-confined VCSELs emit in single mode,the measured side mode suppression ratio(SMSR)is larger than 20 d B and orthogonal polarization suppression ratio achieves 10 d B.Resonant blueshift of VCSELs with triangular and elliptic apertures is observed with the decrease of aperture size. 展开更多
关键词 semiconductor lasers laser diodes microcavity and microdisk lasers semiconductor-device characterization design modeling
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Erbium-ytterbium co-doped lithium niobate single-mode microdisk laser with an ultralow threshold of 1μW
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作者 李明慧 高仁宏 +9 位作者 黎春桃 管江林 张海粟 林锦添 赵光辉 乔迁 汪旻 乔玲玲 邓莉 程亚 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第4期48-52,共5页
We demonstrate single-mode microdisk lasers in the telecom band with ultralow thresholds on erbium-ytterbium co-doped thin-film lithium niobate(TFLN).The active microdisk was fabricated with high-Q factors by photolit... We demonstrate single-mode microdisk lasers in the telecom band with ultralow thresholds on erbium-ytterbium co-doped thin-film lithium niobate(TFLN).The active microdisk was fabricated with high-Q factors by photolithography-assisted chemomechanical etching.Thanks to the erbium-ytterbium co-doping providing high optical gain,the ultralow loss nanostructuring,and the excitation of high-Q coherent polygon modes,which suppresses multimode lasing and allows high spatial mode overlap between pump and lasing modes,single-mode laser emission operating at 1530 nm wavelength was observed with an ultralow threshold,under a 980-nm-band optical pump.The threshold was measured as low as 1μW,which is one order of magnitude smaller than the best results previously reported in single-mode active TFLN microlasers.The conversion efficiency reaches 4.06×10^(-3),which is also the highest value reported in single-mode active TFLN microlasers. 展开更多
关键词 lithium niobate MICROCAVITIES microdisk lasers
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