Kroemer Symposium, May 20, 2013

STANFORD

JSH 1

Mentoring and Great Times with Herb Kroemer

Herbert Kroemer Symposium, May 20, 2013

James S. Harris

Kroemer Symposium, May 20, 2013

STANFORD

JSH 2

If,in discussing a semiconductor problem, you cannot draw anEnergy Band Diagram,

then you don't knowwhat you are talking about.

Corollary: If you can, but don't,then your audience won't know

what you are talking about

Kroemer’s Lemma ofProven Ignorance

H. Kroemer-Prof. UCSB2000 Nobel lecture

Kroemer Symposium, May 20, 2013

STANFORD

JSH 3

Heterojunction Confusion

Kroemer Symposium, May 20, 2013

STANFORD

JSH 4

The Saga of Heterojunction Barriers

Kroemer Symposium, May 20, 2013

STANFORD

JSH 5

The Heterojunction Barrier Mystery Solved

Kroemer Symposium, May 20, 2013

STANFORD

JSH 6

Heterojunction LaserProc. IEEE, Dec. 1963

Kroemer Symposium, May 20, 2013

STANFORD

JSH 7

Microdisk Ge QW Photoluminescence

• Amplified spontaneous emission pumped by 900nm pulsed laser

• Two small peaks on each fringe

TE / TM or higher order mode

• PL intensity is super linear, estimated gain of 1500 cm-1

-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1350 1400 1450 1500 15500

2000

4000

6000

8000

Wavelength (nm)

PL

inte

nsity

(a.u

.)

10 mW20 mW30 mW40 mW60 mW