Highly Sensitive, Gate-Tunable, Room-Temperature Mid-Infrared Photodetection Based on Graphene-Bi2Se3 Heterostructure

Jaeseok Kim, Sungjoon Park, Houk Jang, Nikesh Koirala, Jae Bok Lee, Un Jeong Kim, Hong Seok Lee, Young Geun Roh, Hyangsook Lee, Sangwan Sim, Soonyoung Cha, Chihun In, Jun Park, Jekwan Lee, Minji Noh, Jisoo Moon, Maryam Salehi, Jiho Sung, Sang Soo Chee, Moon Ho Ham & 6 others Moon Ho Jo, Seongshik Oh, Jong-Hyun Ahn, Sung Woo Hwang, Dohun Kim, Hyunyong Choi

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Broadband detection of mid-infrared (IR) photons extends to advanced optoelectronic applications such as imaging, sensing, and telecommunications. While graphene offers an attractive platform for broadband visible/IR photodetection, previous efforts to improve its responsivity, for example, by integrating light-absorbing colloids or waveguide or antenna fabrication, were achieved at the cost of reduced photon detection bandwidth. In this work, we demonstrate room-temperature operation of a novel mid-IR photodetector based on a graphene-Bi2Se3 heterostructure showing broadband detection and high responsivity (1.97 and 8.18 A/W at mid- and near-IR, respectively), in which simultaneous improvement of the spectral range and responsivity is achieved via exploiting broadband absorption of mid-IR and IR photons in a small-band-gap Bi2Se3 topological insulator and efficient hot carrier separation and strong photogating across the Bi2Se3/graphene interface. With sufficient room for further improvement by interface engineering, our results show a promising route to realize ultrabroadband, high-responsivity hot-carrier optoelectronics at room temperature.

Original languageEnglish
Pages (from-to)482-488
Number of pages7
JournalACS Photonics
Volume4
Issue number3
DOIs
Publication statusPublished - 2017 Mar 15

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Photons
Graphene
Heterojunctions
graphene
broadband
Infrared radiation
Temperature
room temperature
Telecommunications
photons
Hot carriers
Colloids
Optoelectronic devices
rooms
photometers
colloids
Light
telecommunication
antennas

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

Kim, Jaeseok ; Park, Sungjoon ; Jang, Houk ; Koirala, Nikesh ; Lee, Jae Bok ; Kim, Un Jeong ; Lee, Hong Seok ; Roh, Young Geun ; Lee, Hyangsook ; Sim, Sangwan ; Cha, Soonyoung ; In, Chihun ; Park, Jun ; Lee, Jekwan ; Noh, Minji ; Moon, Jisoo ; Salehi, Maryam ; Sung, Jiho ; Chee, Sang Soo ; Ham, Moon Ho ; Jo, Moon Ho ; Oh, Seongshik ; Ahn, Jong-Hyun ; Hwang, Sung Woo ; Kim, Dohun ; Choi, Hyunyong. / Highly Sensitive, Gate-Tunable, Room-Temperature Mid-Infrared Photodetection Based on Graphene-Bi2Se3 Heterostructure. In: ACS Photonics. 2017 ; Vol. 4, No. 3. pp. 482-488.
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abstract = "Broadband detection of mid-infrared (IR) photons extends to advanced optoelectronic applications such as imaging, sensing, and telecommunications. While graphene offers an attractive platform for broadband visible/IR photodetection, previous efforts to improve its responsivity, for example, by integrating light-absorbing colloids or waveguide or antenna fabrication, were achieved at the cost of reduced photon detection bandwidth. In this work, we demonstrate room-temperature operation of a novel mid-IR photodetector based on a graphene-Bi2Se3 heterostructure showing broadband detection and high responsivity (1.97 and 8.18 A/W at mid- and near-IR, respectively), in which simultaneous improvement of the spectral range and responsivity is achieved via exploiting broadband absorption of mid-IR and IR photons in a small-band-gap Bi2Se3 topological insulator and efficient hot carrier separation and strong photogating across the Bi2Se3/graphene interface. With sufficient room for further improvement by interface engineering, our results show a promising route to realize ultrabroadband, high-responsivity hot-carrier optoelectronics at room temperature.",
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Kim, J, Park, S, Jang, H, Koirala, N, Lee, JB, Kim, UJ, Lee, HS, Roh, YG, Lee, H, Sim, S, Cha, S, In, C, Park, J, Lee, J, Noh, M, Moon, J, Salehi, M, Sung, J, Chee, SS, Ham, MH, Jo, MH, Oh, S, Ahn, J-H, Hwang, SW, Kim, D & Choi, H 2017, 'Highly Sensitive, Gate-Tunable, Room-Temperature Mid-Infrared Photodetection Based on Graphene-Bi2Se3 Heterostructure', ACS Photonics, vol. 4, no. 3, pp. 482-488. https://doi.org/10.1021/acsphotonics.6b00972

Highly Sensitive, Gate-Tunable, Room-Temperature Mid-Infrared Photodetection Based on Graphene-Bi2Se3 Heterostructure. / Kim, Jaeseok; Park, Sungjoon; Jang, Houk; Koirala, Nikesh; Lee, Jae Bok; Kim, Un Jeong; Lee, Hong Seok; Roh, Young Geun; Lee, Hyangsook; Sim, Sangwan; Cha, Soonyoung; In, Chihun; Park, Jun; Lee, Jekwan; Noh, Minji; Moon, Jisoo; Salehi, Maryam; Sung, Jiho; Chee, Sang Soo; Ham, Moon Ho; Jo, Moon Ho; Oh, Seongshik; Ahn, Jong-Hyun; Hwang, Sung Woo; Kim, Dohun; Choi, Hyunyong.

In: ACS Photonics, Vol. 4, No. 3, 15.03.2017, p. 482-488.

Research output: Contribution to journalArticle

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AU - Kim, Jaeseok

AU - Park, Sungjoon

AU - Jang, Houk

AU - Koirala, Nikesh

AU - Lee, Jae Bok

AU - Kim, Un Jeong

AU - Lee, Hong Seok

AU - Roh, Young Geun

AU - Lee, Hyangsook

AU - Sim, Sangwan

AU - Cha, Soonyoung

AU - In, Chihun

AU - Park, Jun

AU - Lee, Jekwan

AU - Noh, Minji

AU - Moon, Jisoo

AU - Salehi, Maryam

AU - Sung, Jiho

AU - Chee, Sang Soo

AU - Ham, Moon Ho

AU - Jo, Moon Ho

AU - Oh, Seongshik

AU - Ahn, Jong-Hyun

AU - Hwang, Sung Woo

AU - Kim, Dohun

AU - Choi, Hyunyong

PY - 2017/3/15

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