Phonon black-body radiation limit for heat dissipation in electronics

• Thermal dissipation at the active region of electronic devices is a fundamental process of considerable importance. Inadequate heat dissipation can lead to prohibitively large temperature rises that degrade performance, and intensive efforts are under way to mitigate this self-heating. At room temperature, thermal resistance is due to scattering, often by defects and interfaces in the active region, that impedes the transport of phonons. Here, we demonstrate that heat dissipation in widely used cryogenic electronicdevices instead occurs by phonon black-body radiationwith the complete absence of scattering, leading to largeself-heating at cryogenic temperatures and setting a key limiton the noise floor. Our result has important implications for the many fields that require ultralow-noise electronic devices.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Keyword

phonon black-body radiation

electronics

Heat dissipation

cryogenic

Publication and Content Type

art (subject category)

ref (subject category)