A CVD Diamond-Based Photodetector for the Visible and Near-IR Spectral Range

Journal Article · Fri Dec 15 04:00:00 EST 2017 · Technical Physics Letters

DOI:https://doi.org/10.1134/S1063785017120215· OSTI ID:22783989

Radischev, D. B.; Lobaev, M. A.; Bogdanov, S. A. ^[1]; Zdoroveischev, A. V.; Chunin, I. I. ^[2]

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1. Federal Research Center, Institute of Applied Physics, Russian Academy of Sciences (Russian Federation)
2. Lobachevsky State University of Nizhny Novgorod, Physical-Technical Research Institute (Russian Federation)

A photodetector for the visible and near-IR spectral range has been created on the basis of a chemical- vapor-deposited diamond modulation-doped with boron. The detected electromagnetic radiation is absorbed in a thin Cr (7 nm)–Au (5.5 nm) bimetallic sublayer deposited on the surface of a modulationdoped diamond film comprising a highly doped (up to 5 × 10{sup 19} cm{sup –3}) 3-nm-thick delta-layer, low-doped (~10{sup 17} cm{sup –3}) 800-nm-thick sublayer, and highly doped (10{sup 20} cm{sup –3}) ~10-μm-thick sublayer with an ohmic Ti(50 nm)/Pt(15 nm)/Au(30 nm) contact. Holes generated in the bimetallic sublayer diffuse into diamond and are accelerated by an electric field in the low-doped sublayer to form a response photocurrent. The ampere/watt responsivity of the photodetector reaches 1 μA/W at a radiation wavelength of 445 nm and 0.18 μA/W at 1.06 μm.

• OSTI ID: 22783989
• Journal Information: Technical Physics Letters, Journal Name: Technical Physics Letters Journal Issue: 12 Vol. 43; ISSN 1063-7850
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BORON ADDITIONS
CHEMICAL VAPOR DEPOSITION
CHROMIUM
DIAMONDS
DOPED MATERIALS
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
FILMS
GOLD
INFRARED SPECTRA
LAYERS
MODULATION
PHOTOCURRENTS
PHOTODETECTORS
PLATINUM
SURFACES
TITANIUM
WAVELENGTHS