52:
71:
For use as a terahertz detector, the switch consists of the same geometry but without the applied bias voltage. Instead, the incident terahertz pulse itself provides the bias field for the charge carriers during the interval when the switch is activated by the (much shorter) laser pulse. The induced
67:
pulses is focused on the gap, it excites charge carriers into the semiconductor's conduction band, which are subsequently accelerated by the bias voltage. The induced acceleration from the photocurrent causes the charge carriers to radiate in terahertz frequencies, generating a pulse lasting several
59:
An Auston switch consists of a transmission line antenna with a gap that is bridged by a semiconductor. For terahertz generation, a DC bias voltage is applied across the antenna. When light from a
72:
photocurrent can then be amplified and measured. To map the entire span of the terahertz pulse, the time delay between the femtosecond pulses at generation and detection can be varied.
251:
32:
98:
293:
303:
298:
191:
Schmuttenmaer, Charles A. (April 2004). "Exploring
Dynamics in the Far-Infrared with Terahertz Spectroscopy".
55:
Typical time response of a photocurrent generated with an Auston switch using a femtosecond laser pulse.
231:
150:
135:
51:
261:
166:
108:
247:
208:
94:
25:
239:
200:
158:
273:
120:
36:
28:
235:
154:
287:
170:
60:
64:
162:
40:
212:
243:
204:
50:
31:
that is commonly used in the generation and detection of pulsed
93:(Online-Ausg. ed.). Dordrecht: Springer. p. 112.
230:. Topics in Applied Physics. Vol. 74. pp. 7–50.
89:
Bartolo, edited by
Baldassare Di; Forte, Ottavio (2006).
143:
IEEE Transactions on
Terahertz Science and Technology
91:Advances in spectroscopy for lasers and sensing
8:
226:Nuss, Martin C.; Orenstein, Joseph (1998).
35:radiation. It is named after the physicist
81:
269:
259:
116:
106:
39:who first developed the technology at
7:
136:"Terahertz Pioneer: David H. Auston"
134:Siegel, Peter H. (September 2011).
228:Terahertz time-domain spectroscopy
14:
1:
320:
163:10.1109/TTHZ.2011.2151130
56:
22:photoconductive switch
54:
294:Terahertz technology
236:1998msws.book....7N
155:2011ITTST...1....6S
244:10.1007/BFb0103419
119:has generic name (
57:
24:) is an optically
253:978-3-540-62860-6
205:10.1021/cr020685g
20:(also known as a
311:
278:
277:
271:
267:
265:
257:
223:
217:
216:
199:(4): 1759–1780.
193:Chemical Reviews
188:
182:
181:
179:
177:
140:
131:
125:
124:
118:
114:
112:
104:
86:
319:
318:
314:
313:
312:
310:
309:
308:
304:Optoelectronics
299:Optical devices
284:
283:
282:
281:
268:
258:
254:
225:
224:
220:
190:
189:
185:
175:
173:
138:
133:
132:
128:
115:
105:
101:
88:
87:
83:
78:
49:
37:David H. Auston
12:
11:
5:
317:
315:
307:
306:
301:
296:
286:
285:
280:
279:
270:|journal=
252:
218:
183:
126:
99:
80:
79:
77:
74:
48:
45:
43:in the 1960s.
13:
10:
9:
6:
4:
3:
2:
316:
305:
302:
300:
297:
295:
292:
291:
289:
275:
263:
255:
249:
245:
241:
237:
233:
229:
222:
219:
214:
210:
206:
202:
198:
194:
187:
184:
172:
168:
164:
160:
156:
152:
148:
144:
137:
130:
127:
122:
117:|first1=
110:
102:
100:9781402047893
96:
92:
85:
82:
75:
73:
69:
68:picoseconds.
66:
62:
53:
46:
44:
42:
38:
34:
30:
27:
23:
19:
18:Auston switch
227:
221:
196:
192:
186:
174:. Retrieved
146:
142:
129:
90:
84:
70:
61:pulsed laser
58:
21:
17:
15:
65:femtosecond
288:Categories
176:4 November
149:(1): 6–8.
76:References
272:ignored (
262:cite book
109:cite book
41:Bell Labs
33:terahertz
213:15080711
171:42732371
232:Bibcode
151:Bibcode
47:Working
29:antenna
250:
211:
169:
97:
167:S2CID
139:(PDF)
63:with
26:gated
274:help
248:ISBN
209:PMID
178:2014
121:help
95:ISBN
240:doi
201:doi
197:104
159:doi
16:An
290::
266::
264:}}
260:{{
246:.
238:.
207:.
195:.
165:.
157:.
145:.
141:.
113::
111:}}
107:{{
276:)
256:.
242::
234::
215:.
203::
180:.
161::
153::
147:1
123:)
103:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
