News & Views |
Featured
-
-
Article |
Actively tunable laser action in GeSn nanomechanical oscillators
An on-chip tunable laser operates by harnessing nanomechanical resonances at the radio frequency, achieving ultralow tuning power consumption.
- Hyo-Jun Joo
- , Jiawen Liu
- & Donguk Nam
-
Article |
Optical gain and lasing from bulk cadmium sulfide nanocrystals through bandgap renormalization
Solution-processable CdS ‘bulk’ nanocrystals show efficient on-chip lasing under quasi-continuous-wave conditions with excellent beam quality and pump thresholds.
- Ivo Tanghe
- , Margarita Samoli
- & Pieter Geiregat
-
Article |
A high-performance topological bulk laser based on band-inversion-induced reflection
The interface between photonic crystals with distinct in-band topologies confines electromagnetic modes and gives rise to lasing emission in the bulk.
- Zeng-Kai Shao
- , Hua-Zhou Chen
- & Ren-Min Ma
-
Article |
Directional lasing in resonant semiconductor nanoantenna arrays
Active dielectric nanoantenna arrays exhibit low-threshold and high-quality-factor directional lasing achieved via a leaky resonance excited in coupled gallium arsenide (GaAs) nanopillars.
- Son Tung Ha
- , Yuan Hsing Fu
- & Arseniy I. Kuznetsov
-
Article |
Towards zero-threshold optical gain using charged semiconductor quantum dots
Blocking band-edge absorption of compositionally graded quantum dots with suppressed Auger recombination by pre-existing electrons allows for demonstrating near-zero-threshold optical gain and amplified spontaneous emission at sub-single-exciton pump levels.
- Kaifeng Wu
- , Young-Shin Park
- & Victor I. Klimov
-
Article |
Room-temperature continuous-wave lasing from monolayer molybdenum ditelluride integrated with a silicon nanobeam cavity
A silicon nanobeam cavity laser integrated with monolayer molybdenum ditelluride enables room-temperature lasing in the near infrared.
- Yongzhuo Li
- , Jianxing Zhang
- & C. Z. Ning
-
Review Article |
Origin and control of blinking in quantum dots
Semiconductor nanocrystals offer an enormous diversity of device applications that have been potentially limited by intermittent fluorescence intensity or 'blinking' dynamics. However, recent progress in both experiment and theory suggest a more promising outlook.
- Alexander L. Efros
- & David J. Nesbitt
-
Commentary |
What future for quantum dot-based light emitters?
Synthesis of semiconductor colloidal quantum dots by low-cost, solution-based methods has produced an abundance of basic science. Can these materials be transformed to high-performance light emitters to disrupt established photonics technologies, particularly semiconductor lasers?
- Arto Nurmikko
-
Article |
A monolithic white laser
A monolithic heterostructure nanosheet composed of a ZnCdSSe multi-segment quaternary alloy can simultaneously emit laser light in the red, green and blue.
- Fan Fan
- , Sunay Turkdogan
- & C. Z. Ning
-
News & Views |
Taken for a spin
A built-in semiconductor/nanomagnet interface acts as a spin filter in a conventional laser to produce circularly polarized emission without the need for external spin-polarized pumping.
- Igor Žutić
- & Paulo E. Faria Junior
-
Letter |
Continuous-wave biexciton lasing at room temperature using solution-processed quantum wells
Colloidal quantum wells can be used to achieve continuous-wave-pumped stimulated emission and, if placed in a cavity, lasing.
- Joel Q. Grim
- , Sotirios Christodoulou
- & Iwan Moreels
-
Article |
Self-polarized spin-nanolasers
Fe3O4 nanoparticles deposited on top of GaN nanorods produce a spin-up and spin-down imbalance that makes the semiconductor emit coherent spin-polarized light.
- Ju-Ying Chen
- , Tong-Ming Wong
- & Yang-Fang Chen
-
Letter |
Random nanolasing in the Anderson localized regime
Anderson localization of light in photonic-crystal waveguides enables highly efficient, stable and broadband random nanolasing.
- J. Liu
- , P. D. Garcia
- & P. Lodahl
Tuning light by the vibes