Advanced Photonics Congress

26 July 2021 – 30 July 2021
Optica Virtual Event - Eastern Daylight/Summer Time (UTC - 04:00)

Keynote Speaker: Eli Yablonovitch

University of California, Berkeley

Light Trapping in Perspective; Not Just for Current, it Boosts Voltage Too

Almost all commercial solar panels use Light Trapping which increases the internal optical path length by 4(n squared), increasing the current, where n is refractive index.  In spite of numerous ingenious attempts, that classical enhancement factor has not been superseded.  It is sometimes over-looked that operating point Voltage also increases, by (kT/q)ln{4(n squared)}~100mVolts.

About the Speaker

Eli Yablonovitch is Director of the NSF Center for Energy Efficient Electronics Science (E3S), a multi-University Center headquartered at Berkeley. Yablonovitch introduced the idea that strained semiconductor lasers could have superior performance due to reduced effective mass (holes). With almost every human interaction with the internet, optical telecommunication occurs by strained semiconductor lasers. He is regarded as a Father of the Photonic BandGap concept, and he coined the term "Photonic Crystal". The geometrical structure of the first experimentally realized Photonic bandgap, is sometimes called “Yablonovite”. He was elected to NAE, NAS, NAI, AmAcArSci, and as Foreign Member, UK Royal Society.