Terahertz optics articles from across Nature Portfolio

Picosecond pulses of terahertz light used for rapid and reversible switching of charged excitons (trions) into neutral excitons in a two-dimensional semiconductor open perspectives for high-speed optoelectronic devices and fundamental studies of new electronic phases of matter.

Using short pulses in the terahertz spectral range following optical injection, ultrafast excitation of trions to excitons and free carriers in monolayer MoSe₂ can be realized within picoseconds, advancing nanoscale optoelectronics devices.

A Brillouin laser-driven terahertz oscillator is developed. The phase noise level of the generated terahertz waves is less than –100 dBc Hz^–1, translating to timing noise below 10 as Hz^–1/2 at 10 kHz Fourier frequency, over a carrier frequency range from 300 GHz to 3 THz.

The 30-years development of quantum cascade lasers has established them as a go-to source of coherent radiation in the Mid-IR and THz ranges. In this comment, the authors guide the reader through the landmark achievements of this technology, from a lab curiosity to a mature technology adopted by research groups and companies.

Picosecond pulses of terahertz light used for rapid and reversible switching of charged excitons (trions) into neutral excitons in a two-dimensional semiconductor open perspectives for high-speed optoelectronic devices and fundamental studies of new electronic phases of matter.

Prof. Manijeh Razeghi, a true star who radiates energy and light, calls on all women to realize their true value and potential.

A new design of electron gun that uses terahertz waves to accelerate electrons in a high field gradient brings a tabletop answer to the generation of ultrashort electron bunches.

Excitation of magnons — quanta of spin-waves — in an antiferromagnet can be used for high-speed data processing. The addition and subtraction of two such modes opens up possibilities for magnon-based information transfer in the terahertz spectral region.