Optoelectronics Research Group

News

December 18, 2017

Important advances: 

  1. Record low threshold current density for growth on (100) Si: 198 A/cm^2 
  2. Record low threshold current for any F-P laser grown on Si
  3. Record high injection efficiency: 87%
  4. Record long…
December 12, 2017

Silicon photonic integration is an enabling technology for power- and cost-effective optical interconnects in exascale performance computers and datacenters which require extremely low power consumption and dense integration for a higher…

November 21, 2017

We demonstrate integrated optical isolators with broadband behavior for the standard silicon-on-insulator platform. We achieve over 20 dB of optical isolation across 18 nm of optical bandwidth. The isolator is completely electrically controlled…

November 20, 2017

We demonstrate a technique to precisely control and stabilize the beat frequency of a photonic microwave signal generator based on beating the optical signals of two lasers on a high-speed photodetector. The approach does not require high-speed…

October 24, 2017

We report 1300 nm continuous wave lasing on an on-axis GaP/Si (001) virtual substrate operating up to 60°C with record low threshold current of 27 mA. Ridge and broad area lasers were fabricated with seven layers of p-modulation doped quantum…

October 12, 2017

We demonstrate the first interband cascade lasers heterogeneously integrated with silicon waveguides. The 3.6 μm wavelength lasers operate in pulsed mode at room temperature, with threshold currents as low as 394 mA.

September 27, 2017

As a result of record low threading dislocation densities, the threshold current and threshold current density have gone down in our Quantum Dot lasers, and we see record high wallplug efficiencies for any laser on silicon.

August 1, 2017

The cover of the latest issue of Optica shows the latest quantum dot microring lasers on silicon with record low lasing thresholds.  This is promising for next generation data center interconnects.

July 1, 2017

We are looking for two photonics students and two postdocs for design, fabrication and testing of photonic integrated circuits. Students should apply to the ECE or Materials departments for Fall 2018 admission. Postdocs should apply directly to…

June 30, 2017

UCSB and HKUST demonstrated the integration of quantum dot lasers and photodetectors on silicon substrates. An ultra-low dark current of 0.8 nA and an internal responsivity of 0.9 A/W were measured in the O band.

June 29, 2017

Gordon Kino was my PhD advisor and a great mentor and researcher.  He was my inspiration and model for a great professor. He will be missed by so many researchers across the world.

January 8, 2017

UCSB successfully demonstrated an electrically pumped hybrid silicon laser a decade ago. That advance has paved the way for the commercial production of high-bandwidth silicon photonic devices. Today, Bowers is leading UC Santa Barbara’s…

Events & Seminars

Wolfgang Stolz
Professor, Philipps-Universität Marburg; Co-Founder of NAsP…
December 8, 2017, 9:00 am

Abstract: In recent years, the monolithic integration of III/V-semiconductor materials and heterostructures on CMOS-compatible (001) Si-substrate is gaining…

Frédéric Grillot
Professor, Télécom ParisTech, France, Research Professor,…
November 20, 2017, 2:00 pm

Abstract: By the reduction of semiconductor structure dimensionality, from bulk to quantum-well and finally to quantum-dots (QDs), we gain in control over the energetic…

Urs Hölzle
Senior Vice President, Technical Infrastructure &…
October 20, 2017, 4:30 pm

Abstract: Today, the IT industry accounts for about 2 percent of total greenhouse gas emissions, comparable to the footprint of air travel. This footprint includes everything from…

Publications

D. Jung, P. G. Callahan, B. Shin, K. Murherjee, A…
December 1, 2017
A. S. P. Khope, T. Hirokawa, A. M. Netherton, M.…
November 27, 2017
W. Jin, E. J. Stanton, N. Volet, R. G. Polcawich…
November 23, 2017
E. J. Stanton, N. Volet, and J. E. Bowers
November 22, 2017
D. Huang, P. Pintus, Y. Shoji, P. Morton, T.…
November 21, 2017