[3분논문] 제28회 - 전기구동 나노빔 레이저

황용섭의 3분논문 제28회입니다.

총시간은 4분 51초입니다.

재미있게 들어보세요.

# 방송 바로 듣기

1. 28_3분논문_제28회.mp3

# 방송 mp3 파일 내려받기

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팟캐스트 검색: "3분논문"

팟캐스트 주소: http://itunes.apple.com/us/podcast/3bunnonmun/id568397433

RSS 피드: http://www.iblug.com/xml/itunes/3minpaper.xml

# 논문표지

# 간단한 정보

글쓴이: Kwang-Yong Jeong, You-Shin No, Yongsop Hwang, Ki Soo Kim,

Min-Kyo Seo, Hong-Gyu Park and Yong-Hee Lee

제목: Electrically driven nanobeam laser

학술지: Nature  Communications

발행년월: 2013년 11월 

이어가기: http://dx.doi.org/10.1038/ncomms3822

# 용어

- nanobeam: 나노빔

1차원 광자결정구조. 2차원 슬랩형태로 제작되어오던 광자결정을 1차원으로 변형한 것. 직선의 막대기모양에 공기구멍을 주기적으로 뚫은 것이 대표적이다.

# 발췌

1. 

In this article, we demonstrate an electrically driven, photonic-well, metal-free, 1D nanobeam laser whose physical footprint approaches the smallest possible.

2.

In summary, we demonstrated an electrically driven, photonic well 1D nanobeam laser with a footprint approaching the smallest possible value achievable from metal-free cavities.

# 그림

Figure 2: Electrically driven photonic well nanobeam laser.

(a) Schematic diagram of an electrically driven nanobeam laser. (b) Schematic diagram showing the injection of electrons and holes into the nanobeam cavity. An n-i-p slab structure including three InGaAsP QWs is used. (c) Top-view SEM image of a fabricated nanobeam structure. Only 11 air holes are used to achieve lasing. (d) Magnified top-view SEM image of (c). One can see the post underneath the slab at a high SEM voltage. (e) Tilted-view SEM image of the nanobeam structure. The scale bars in c–e are all 1 μm. (f) Measured output power (red circles) and linewidth (blue triangles) as a function of injected peak current. The lasing threshold is ~65 μA. The inset shows an above-threshold lasing spectrum. Single-mode lasing is observed at a wavelength of 1,556 nm.

Figure 3: Lasing mode profile of the photonic well nanobeam laser.

(a) Lasing mode profile captured by an infrared camera. (b) Calculated vertical component of time-averaged Poynting vector distribution at a position 3.6 μm above the slab, which represents those propagating photons that have escaped from the bound mode shown in (c). The scale bars in (a,b) are 1 μm. (c) Top and side views of the calculated mode profile of log |E|². The SEM image of Fig. 2c is used for this simulation. The resonant wavelength of the mode is 1,588 nm.

#결론

물리적으로 매우 작은 크기의 전기로 구동되는 레이저를 금속을 사용하지 않고 구현하였다는 점에서 의미가 크다. 문턱전류값도 매우 낮다는 것이 특징이다.

끝.

2013년 11월 25일